Speed up the initial loading of Privacy Browser.
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index 908979b..895f20a 100644 (file)
@@ -95,6 +95,7 @@ import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
 import androidx.core.view.GravityCompat;
@@ -104,6 +105,7 @@ import androidx.fragment.app.FragmentManager;
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 import androidx.viewpager.widget.ViewPager;
 
+import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.navigation.NavigationView;
 import com.google.android.material.snackbar.Snackbar;
@@ -113,6 +115,7 @@ import com.stoutner.privacybrowser.BuildConfig;
 import com.stoutner.privacybrowser.R;
 import com.stoutner.privacybrowser.adapters.WebViewPagerAdapter;
 import com.stoutner.privacybrowser.asynctasks.GetHostIpAddresses;
+import com.stoutner.privacybrowser.asynctasks.PopulateBlocklists;
 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
@@ -128,7 +131,7 @@ import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
 import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
 import com.stoutner.privacybrowser.helpers.AdHelper;
-import com.stoutner.privacybrowser.helpers.BlockListHelper;
+import com.stoutner.privacybrowser.helpers.BlocklistHelper;
 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
 import com.stoutner.privacybrowser.helpers.CheckPinnedMismatchHelper;
 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
@@ -155,7 +158,7 @@ import java.util.Set;
 // AppCompatActivity from android.support.v7.app.AppCompatActivity must be used to have access to the SupportActionBar until the minimum API is >= 21.
 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
         DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener, DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener,
-        EditBookmarkFolderDialog.EditBookmarkFolderListener, NavigationView.OnNavigationItemSelectedListener, WebViewTabFragment.NewTabListener {
+        EditBookmarkFolderDialog.EditBookmarkFolderListener, NavigationView.OnNavigationItemSelectedListener, PopulateBlocklists.PopulateBlocklistsListener, WebViewTabFragment.NewTabListener {
 
     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
     public static String orbotStatus;
@@ -197,7 +200,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // The options menu is set in `onCreateOptionsMenu()` and used in `onOptionsItemSelected()`, `updatePrivacyIcons()`, and `initializeWebView()`.
     private Menu optionsMenu;
 
-    // The blocklists are populated in `onCreate()` and accessed from `initializeWebView()`.
+    // The blocklists are populated in `finishedPopulatingBlocklists()` and accessed from `initializeWebView()`.
     private ArrayList<List<String[]>> easyList;
     private ArrayList<List<String[]>> easyPrivacy;
     private ArrayList<List<String[]>> fanboysAnnoyanceList;
@@ -219,8 +222,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
     private boolean inFullScreenBrowsingMode;
 
-    // The hide app bar tracker is used in `applyAppSettings()` and `initializeWebView()`.
+    // The app bar trackers are set in `applyAppSettings()` and used in `initializeWebView()`.
     private boolean hideAppBar;
+    private boolean scrollAppBar;
+
+    // The loading new intent tracker is set in `onNewIntent()` and used in `setCurrentWebView()`.
+    private boolean loadingNewIntent;
 
     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
     private boolean reapplyDomainSettingsOnRestart;
@@ -266,6 +273,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
     private ValueCallback<Uri[]> fileChooserCallback;
 
+    // The default progress view offsets are set in `onCreate()` and used in `initializeWebView()`.
+    private int defaultProgressViewStartOffset;
+    private int defaultProgressViewEndOffset;
+
+    // The swipe refresh layout top padding is used when exiting full screen browsing mode.  It is used in an inner class in `initializeWebView()`.
+    private int swipeRefreshLayoutPaddingTop;
+
+    // The URL sanitizers are set in `applyAppSettings()` and used in `sanitizeUrl()`.
+    private boolean sanitizeGoogleAnalytics;
+    private boolean sanitizeFacebookClickIds;
+    private boolean sanitizeTwitterAmpRedirects;
+
     // The download strings are used in `onCreate()`, `onRequestPermissionResult()` and `initializeWebView()`.
     private String downloadUrl;
     private String downloadContentDisposition;
@@ -282,6 +301,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
     @SuppressLint("ClickableViewAccessibility")
     protected void onCreate(Bundle savedInstanceState) {
+        // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
+        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
+
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
@@ -306,15 +328,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
         // Set the content view.
         setContentView(R.layout.main_framelayout);
-
-        // Get a handle for the input method.
-        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
-
-        // Remove the lint warning below that the input method manager might be null.
-        assert inputMethodManager != null;
-
-        // Get a handle for the toolbar.
+        // Get handles for the views that need to be modified.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
         Toolbar toolbar = findViewById(R.id.toolbar);
+        ViewPager webViewPager = findViewById(R.id.webviewpager);
 
         // Set the action bar.  `SupportActionBar` must be used until the minimum API is >= 21.
         setSupportActionBar(toolbar);
@@ -329,649 +346,571 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         actionBar.setCustomView(R.layout.url_app_bar);
         actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
 
-        // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
-        redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
-        initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
-        finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
-
-        // Get handles for the URL views.
-        EditText urlEditText = findViewById(R.id.url_edittext);
-
-        // Remove the formatting from `urlTextBar` when the user is editing the text.
-        urlEditText.setOnFocusChangeListener((View v, boolean hasFocus) -> {
-            if (hasFocus) {  // The user is editing the URL text box.
-                // Remove the highlighting.
-                urlEditText.getText().removeSpan(redColorSpan);
-                urlEditText.getText().removeSpan(initialGrayColorSpan);
-                urlEditText.getText().removeSpan(finalGrayColorSpan);
-            } else {  // The user has stopped editing the URL text box.
-                // Move to the beginning of the string.
-                urlEditText.setSelection(0);
+        // Initially disable the sliding drawers.  They will be enabled once the blocklists are loaded.
+        drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 
-                // Reapply the highlighting.
-                highlightUrlText();
-            }
-        });
+        // Create the hamburger icon at the start of the AppBar.
+        actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
 
-        // Set the go button on the keyboard to load the URL in `urlTextBox`.
-        urlEditText.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
-            // If the event is a key-down event on the `enter` button, load the URL.
-            if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
-                // Load the URL into the mainWebView and consume the event.
-                loadUrlFromTextBox();
+        // Initialize the web view pager adapter.
+        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
 
-                // If the enter key was pressed, consume the event.
-                return true;
-            } else {
-                // If any other key was pressed, do not consume the event.
-                return false;
-            }
-        });
+        // Set the pager adapter on the web view pager.
+        webViewPager.setAdapter(webViewPagerAdapter);
 
-        // Initialize the Orbot status and the waiting for Orbot trackers.
-        orbotStatus = "unknown";
-        waitingForOrbot = false;
+        // Store up to 100 tabs in memory.
+        webViewPager.setOffscreenPageLimit(100);
 
-        // Create an Orbot status `BroadcastReceiver`.
-        orbotStatusBroadcastReceiver = new BroadcastReceiver() {
-            @Override
-            public void onReceive(Context context, Intent intent) {
-                // Store the content of the status message in `orbotStatus`.
-                orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
+        // Populate the blocklists.
+        new PopulateBlocklists(this, this).execute();
+    }
 
-                // If Privacy Browser is waiting on Orbot, load the website now that Orbot is connected.
-                if (orbotStatus.equals("ON") && waitingForOrbot) {
-                    // Reset the waiting for Orbot status.
-                    waitingForOrbot = false;
+    @Override
+    protected void onNewIntent(Intent intent) {
+        // Get the information from the intent.
+        String intentAction = intent.getAction();
+        Uri intentUriData = intent.getData();
 
-                    // Get the intent that started the app.
-                    Intent launchingIntent = getIntent();
+        // Determine if this is a web search.
+        boolean isWebSearch = ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH));
 
-                    // Get the information from the intent.
-                    String launchingIntentAction = launchingIntent.getAction();
-                    Uri launchingIntentUriData = launchingIntent.getData();
+        // Only process the URI if it contains data or it is a web search.  If the user pressed the desktop icon after the app was already running the URI will be null.
+        if (intentUriData != null || isWebSearch) {
+            // Get the shared preferences.
+            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // If the intent action is a web search, perform the search.
-                    if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
-                        // Create an encoded URL string.
-                        String encodedUrlString;
+            // Create a URL string.
+            String url;
 
-                        // Sanitize the search input and convert it to a search.
-                        try {
-                            encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
-                        } catch (UnsupportedEncodingException exception) {
-                            encodedUrlString = "";
-                        }
+            // If the intent action is a web search, perform the search.
+            if (isWebSearch) {
+                // Create an encoded URL string.
+                String encodedUrlString;
 
-                        // Load the completed search URL.
-                        loadUrl(searchURL + encodedUrlString);
-                    } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
-                        // Load the URL from the intent.
-                        loadUrl(launchingIntentUriData.toString());
-                    } else {  // The is no URL in the intent.
-                        // Select the homepage based on the proxy through Orbot status.
-                        if (proxyThroughOrbot) {
-                            // Load the Tor homepage.
-                            loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
-                        } else {
-                            // Load the normal homepage.
-                            loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
-                        }
-                    }
+                // Sanitize the search input and convert it to a search.
+                try {
+                    encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                } catch (UnsupportedEncodingException exception) {
+                    encodedUrlString = "";
                 }
+
+                // Add the base search URL.
+                url = searchURL + encodedUrlString;
+            } else {  // The intent should contain a URL.
+                // Set the intent data as the URL.
+                url = intentUriData.toString();
             }
-        };
 
-        // Register `orbotStatusBroadcastReceiver` on `this` context.
-        this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
+            // Add a new tab if specified in the preferences.
+            if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {  // Load the URL in a new tab.
+                // Set the loading new intent flag.
+                loadingNewIntent = true;
 
-        // Instantiate the blocklist helper.
-        BlockListHelper blockListHelper = new BlockListHelper();
+                // Add a new tab.
+                addNewTab(url);
+            } else {  // Load the URL in the current tab.
+                // Make it so.
+                loadUrl(url);
+            }
 
-        // Parse the block lists.
-        easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
-        easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
-        fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
-        fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
-        ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
+            // Get a handle for the drawer layout.
+            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-        // Get handles for views that need to be modified.
-        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
-        NavigationView navigationView = findViewById(R.id.navigationview);
-        TabLayout tabLayout = findViewById(R.id.tablayout);
-        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
-        ViewPager webViewPager = findViewById(R.id.webviewpager);
-        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
-        FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
-        FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
-        FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
-        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
+            // Close the navigation drawer if it is open.
+            if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
+                drawerLayout.closeDrawer(GravityCompat.START);
+            }
 
-        // Listen for touches on the navigation menu.
-        navigationView.setNavigationItemSelectedListener(this);
+            // Close the bookmarks drawer if it is open.
+            if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
+                drawerLayout.closeDrawer(GravityCompat.END);
+            }
+        }
+    }
 
-        // Get handles for the navigation menu and the back and forward menu items.  The menu is zero-based.
-        Menu navigationMenu = navigationView.getMenu();
-        MenuItem navigationCloseTabMenuItem = navigationMenu.getItem(0);
-        MenuItem navigationBackMenuItem = navigationMenu.getItem(3);
-        MenuItem navigationForwardMenuItem = navigationMenu.getItem(4);
-        MenuItem navigationHistoryMenuItem = navigationMenu.getItem(5);
-        MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
+    @Override
+    public void onRestart() {
+        // Run the default commands.
+        super.onRestart();
 
-        // Initialize the web view pager adapter.
-        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
+        // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
+        if (proxyThroughOrbot) {
+            // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
+            Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
 
-        // Set the pager adapter on the web view pager.
-        webViewPager.setAdapter(webViewPagerAdapter);
+            // Send the intent to the Orbot package.
+            orbotIntent.setPackage("org.torproject.android");
 
-        // Store up to 100 tabs in memory.
-        webViewPager.setOffscreenPageLimit(100);
+            // Make it so.
+            sendBroadcast(orbotIntent);
+        }
 
-        // Update the web view pager every time a tab is modified.
-        webViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
-            @Override
-            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
-                // Do nothing.
-            }
+        // Apply the app settings if returning from the Settings activity.
+        if (reapplyAppSettingsOnRestart) {
+            // Reset the reapply app settings on restart tracker.
+            reapplyAppSettingsOnRestart = false;
 
-            @Override
-            public void onPageSelected(int position) {
-                // Close the find on page bar if it is open.
-                closeFindOnPage(null);
+            // Apply the app settings.
+            applyAppSettings();
+        }
 
-                // Set the current WebView.
-                setCurrentWebView(position);
+        // Apply the domain settings if returning from the settings or domains activity.
+        if (reapplyDomainSettingsOnRestart) {
+            // Reset the reapply domain settings on restart tracker.
+            reapplyDomainSettingsOnRestart = false;
 
-                // Select the corresponding tab if it does not match the currently selected page.  This will happen if the page was scrolled via swiping in the view pager or by creating a new tab.
-                if (tabLayout.getSelectedTabPosition() != position) {
-                    // Create a handler to select the tab.
-                    Handler selectTabHandler = new Handler();
+            // Reapply the domain settings for each tab.
+            for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                // Get the WebView tab fragment.
+                WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-                    // Create a runnable select the new tab.
-                    Runnable selectTabRunnable = () -> {
-                        // Get a handle for the tab.
-                        TabLayout.Tab tab = tabLayout.getTabAt(position);
+                // Get the fragment view.
+                View fragmentView = webViewTabFragment.getView();
 
-                        // Assert that the tab is not null.
-                        assert tab != null;
+                // Only reload the WebViews if they exist.
+                if (fragmentView != null) {
+                    // Get the nested scroll WebView from the tab fragment.
+                    NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-                        // Select the tab.
-                        tab.select();
-                    };
+                    // Reset the current domain name so the domain settings will be reapplied.
+                    nestedScrollWebView.resetCurrentDomainName();
 
-                    // Select the tab layout after 100 milliseconds, which leaves enough time for a new tab to be created.
-                    selectTabHandler.postDelayed(selectTabRunnable, 100);
+                    // Reapply the domain settings if the URL is not null, which can happen if an empty tab is active when returning from settings.
+                    if (nestedScrollWebView.getUrl() != null) {
+                        applyDomainSettings(nestedScrollWebView, nestedScrollWebView.getUrl(), false, true);
+                    }
                 }
             }
+        }
 
-            @Override
-            public void onPageScrollStateChanged(int state) {
-                // Do nothing.
-            }
-        });
+        // Load the URL on restart (used when loading a bookmark).
+        if (loadUrlOnRestart) {
+            // Load the specified URL.
+            loadUrl(urlToLoadOnRestart);
 
-        // Display the View SSL Certificate dialog when the currently selected tab is reselected.
-        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
-            @Override
-            public void onTabSelected(TabLayout.Tab tab) {
-                // Select the same page in the view pager.
-                webViewPager.setCurrentItem(tab.getPosition());
-            }
+            // Reset the load on restart tracker.
+            loadUrlOnRestart = false;
+        }
 
-            @Override
-            public void onTabUnselected(TabLayout.Tab tab) {
-                // Do nothing.
-            }
+        // Update the bookmarks drawer if returning from the Bookmarks activity.
+        if (restartFromBookmarksActivity) {
+            // Get a handle for the drawer layout.
+            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-            @Override
-            public void onTabReselected(TabLayout.Tab tab) {
-                // Instantiate the View SSL Certificate dialog.
-                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId());
-
-                // Display the View SSL Certificate dialog.
-                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
-            }
-        });
+            // Close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
 
-        // Add the first tab.
-        addTab(null);
+            // Reload the bookmarks drawer.
+            loadBookmarksFolder();
 
-        // Set the bookmarks drawer resources according to the theme.  This can't be done in the layout due to compatibility issues with the `DrawerLayout` support widget.
-        // The deprecated `getResources().getDrawable()` must be used until the minimum API >= 21 and and `getResources().getColor()` must be used until the minimum API >= 23.
-        if (darkTheme) {
-            launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
-            createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
-            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_dark));
-            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.gray_850));
-        } else {
-            launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_light));
-            createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_light));
-            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_light));
-            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.white));
+            // Reset `restartFromBookmarksActivity`.
+            restartFromBookmarksActivity = false;
         }
 
-        // Set the launch bookmarks activity FAB to launch the bookmarks activity.
-        launchBookmarksActivityFab.setOnClickListener(v -> {
-            // Get a copy of the favorite icon bitmap.
-            Bitmap favoriteIconBitmap = currentWebView.getFavoriteOrDefaultIcon();
+        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
+        updatePrivacyIcons(true);
+    }
 
-            // Create a favorite icon byte array output stream.
-            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
+    @Override
+    public void onResume() {
+        // Run the default commands.
+        super.onResume();
 
-            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // Convert the favorite icon byte array stream to a byte array.
-            byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-            // Create an intent to launch the bookmarks activity.
-            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
+            // Only resume the WebViews if they exist (they won't when the app is first created).
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-            // Add the extra information to the intent.
-            bookmarksIntent.putExtra("current_url", currentWebView.getUrl());
-            bookmarksIntent.putExtra("current_title", currentWebView.getTitle());
-            bookmarksIntent.putExtra("current_folder", currentBookmarksFolder);
-            bookmarksIntent.putExtra("favorite_icon_byte_array", favoriteIconByteArray);
+                // Resume the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.resumeTimers();
 
-            // Make it so.
-            startActivity(bookmarksIntent);
-        });
+                // Resume the nested scroll WebView.
+                nestedScrollWebView.onResume();
+            }
+        }
 
-        // Set the create new bookmark folder FAB to display an alert dialog.
-        createBookmarkFolderFab.setOnClickListener(v -> {
-            // Create a create bookmark folder dialog.
-            DialogFragment createBookmarkFolderDialog = CreateBookmarkFolderDialog.createBookmarkFolder(currentWebView.getFavoriteOrDefaultIcon());
+        // Display a message to the user if waiting for Orbot.
+        if (waitingForOrbot && !orbotStatus.equals("ON")) {
+            // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
+            currentWebView.getSettings().setUseWideViewPort(false);
 
-            // Show the create bookmark folder dialog.
-            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
-        });
+            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+            currentWebView.loadData("<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>", "text/html", null);
+        }
 
-        // Set the create new bookmark FAB to display an alert dialog.
-        createBookmarkFab.setOnClickListener(view -> {
-            // Instantiate the create bookmark dialog.
-            DialogFragment createBookmarkDialog = CreateBookmarkDialog.createBookmark(currentWebView.getUrl(), currentWebView.getTitle(), currentWebView.getFavoriteOrDefaultIcon());
+        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
+            // Get a handle for the root frame layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-            // Display the create bookmark dialog.
-            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
-        });
+            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-        // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
-        findOnPageEditText.addTextChangedListener(new TextWatcher() {
-            @Override
-            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
-                // Do nothing.
-            }
+            /* Hide the system bars.
+             * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+             * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+             */
+            rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // Resume the adView for the free flavor.
+            // Resume the ad.
+            AdHelper.resumeAd(findViewById(R.id.adview));
+        }
+    }
 
-            @Override
-            public void onTextChanged(CharSequence s, int start, int before, int count) {
-                // Do nothing.
-            }
+    @Override
+    public void onPause() {
+        // Run the default commands.
+        super.onPause();
 
-            @Override
-            public void afterTextChanged(Editable s) {
-                // Search for the text in the WebView if it is not null.  Sometimes on resume after a period of non-use the WebView will be null.
-                if (currentWebView != null) {
-                    currentWebView.findAllAsync(findOnPageEditText.getText().toString());
-                }
-            }
-        });
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
-        findOnPageEditText.setOnKeyListener((v, keyCode, event) -> {
-            if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
-                // Hide the soft keyboard.
-                inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-                // Consume the event.
-                return true;
-            } else {  // A different key was pressed.
-                // Do not consume the event.
-                return false;
-            }
-        });
+            // Only pause the WebViews if they exist (they won't when the app is first created).
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-        // Implement swipe to refresh.
-        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
+                // Pause the nested scroll WebView.
+                nestedScrollWebView.onPause();
 
-        // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
-        swipeRefreshLayout.setProgressViewOffset(false, swipeRefreshLayout.getProgressViewStartOffset() - 10, swipeRefreshLayout.getProgressViewEndOffset());
+                // Pause the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.pauseTimers();
+            }
+        }
 
-        // Set the swipe to refresh color according to the theme.
-        if (darkTheme) {
-            swipeRefreshLayout.setColorSchemeResources(R.color.blue_800);
-            swipeRefreshLayout.setProgressBackgroundColorSchemeResource(R.color.gray_850);
-        } else {
-            swipeRefreshLayout.setColorSchemeResources(R.color.blue_500);
+        // Pause the ad or it will continue to consume resources in the background on the free flavor.
+        if (BuildConfig.FLAVOR.contentEquals("free")) {
+            // Pause the ad.
+            AdHelper.pauseAd(findViewById(R.id.adview));
         }
+    }
 
-        // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
-        drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
-        drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
+    @Override
+    public void onDestroy() {
+        // Unregister the Orbot status broadcast receiver.
+        this.unregisterReceiver(orbotStatusBroadcastReceiver);
 
-        // Initialize the bookmarks database helper.  The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
-        bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
 
-        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
-        currentBookmarksFolder = "";
+        // Run the default commands.
+        super.onDestroy();
+    }
 
-        // Load the home folder, which is `""` in the database.
-        loadBookmarksFolder();
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu.  This adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.webview_options_menu, menu);
 
-        bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
-            // Convert the id from long to int to match the format of the bookmarks database.
-            int databaseID = (int) id;
+        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
+        optionsMenu = menu;
 
-            // Get the bookmark cursor for this ID and move it to the first row.
-            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
-            bookmarkCursor.moveToFirst();
+        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
+        updatePrivacyIcons(false);
 
-            // Act upon the bookmark according to the type.
-            if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
-                // Store the new folder name in `currentBookmarksFolder`.
-                currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+        // Get handles for the menu items.
+        MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
+        MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
+        MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
+        MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
+        MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
 
-                // Load the new folder.
-                loadBookmarksFolder();
-            } else {  // The selected bookmark is not a folder.
-                // Load the bookmark URL.
-                loadUrl(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
+        // Only display third-party cookies if API >= 21
+        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
-                // Close the bookmarks drawer.
-                drawerLayout.closeDrawer(GravityCompat.END);
-            }
+        // Only display the form data menu items if the API < 26.
+        toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
+        clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
 
-            // Close the `Cursor`.
-            bookmarkCursor.close();
-        });
+        // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
+        clearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
 
-        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
-            // Convert the database ID from `long` to `int`.
-            int databaseId = (int) id;
+        // Only show Ad Consent if this is the free flavor.
+        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 
-            // Find out if the selected bookmark is a folder.
-            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
+        // Get the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            if (isFolder) {
-                // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
-                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+        // Get the dark theme and app bar preferences..
+        boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-                // Show the edit bookmark folder `AlertDialog` and name the instance `@string/edit_folder`.
-                DialogFragment editBookmarkFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
-                editBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.edit_folder));
-            } else {
-                // Show the edit bookmark `AlertDialog` and name the instance `@string/edit_bookmark`.
-                DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
-                editBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.edit_bookmark));
-            }
+        // Set the status of the additional app bar icons.  Setting the refresh menu item to `SHOW_AS_ACTION_ALWAYS` makes it appear even on small devices like phones.
+        if (displayAdditionalAppBarIcons) {
+            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
+        } else { //Do not display the additional icons.
+            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+        }
 
-            // Consume the event.
-            return true;
-        });
+        // Replace Refresh with Stop if a URL is already loading.
+        if (currentWebView != null && currentWebView.getProgress() != 100) {
+            // Set the title.
+            refreshMenuItem.setTitle(R.string.stop);
 
-        // Get the status bar pixel size.
-        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
-        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+            // If the icon is displayed in the AppBar, set it according to the theme.
+            if (displayAdditionalAppBarIcons) {
+                if (darkTheme) {
+                    refreshMenuItem.setIcon(R.drawable.close_dark);
+                } else {
+                    refreshMenuItem.setIcon(R.drawable.close_light);
+                }
+            }
+        }
 
-        // Get the resource density.
-        float screenDensity = getResources().getDisplayMetrics().density;
+        // Done.
+        return true;
+    }
 
-        // Calculate the drawer header padding.  This is used to move the text in the drawer headers below any cutouts.
-        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
-        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
-        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        // Get handles for the menu items.
+        MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
+        MenuItem firstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
+        MenuItem thirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
+        MenuItem domStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
+        MenuItem saveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
+        MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
+        MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
+        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem blocklistsMenuItem = menu.findItem(R.id.blocklists);
+        MenuItem easyListMenuItem = menu.findItem(R.id.easylist);
+        MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
+        MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
+        MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
+        MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
+        MenuItem blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
+        MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
+        MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
+        MenuItem wideViewportMenuItem = menu.findItem(R.id.wide_viewport);
+        MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
+        MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
+        MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
 
-        // The drawer listener is used to update the navigation menu.`
-        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
-            @Override
-            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
-            }
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-            @Override
-            public void onDrawerOpened(@NonNull View drawerView) {
-            }
+        // Initialize the current user agent string and the font size.
+        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
+        int fontSize = 100;
 
-            @Override
-            public void onDrawerClosed(@NonNull View drawerView) {
+        // Set items that require the current web view to be populated.  It will be null when the program is first opened, as `onPrepareOptionsMenu()` is called before the first WebView is initialized.
+        if (currentWebView != null) {
+            // Set the add or edit domain text.
+            if (currentWebView.getDomainSettingsApplied()) {
+                addOrEditDomain.setTitle(R.string.edit_domain_settings);
+            } else {
+                addOrEditDomain.setTitle(R.string.add_domain_settings);
             }
 
-            @Override
-            public void onDrawerStateChanged(int newState) {
-                if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
-                    // Get handles for the drawer headers.
-                    TextView navigationHeaderTextView = findViewById(R.id.navigationText);
-                    TextView bookmarksHeaderTextView = findViewById(R.id.bookmarks_title_textview);
+            // Get the current user agent from the WebView.
+            currentUserAgent = currentWebView.getSettings().getUserAgentString();
 
-                    // Apply the navigation header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
-                    if (navigationHeaderTextView != null) {
-                        navigationHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
-                    }
+            // Get the current font size from the
+            fontSize = currentWebView.getSettings().getTextZoom();
 
-                    // Apply the bookmarks header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
-                    if (bookmarksHeaderTextView != null) {
-                        bookmarksHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
-                    }
+            // Set the status of the menu item checkboxes.
+            domStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+            saveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
+            easyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
+            easyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
+            fanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+            fanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+            ultraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
+            blockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            swipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
+            wideViewportMenuItem.setChecked(currentWebView.getSettings().getUseWideViewPort());
+            displayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
+            nightModeMenuItem.setChecked(currentWebView.getNightMode());
 
-                    // Update the navigation menu items.
-                    navigationCloseTabMenuItem.setEnabled(tabLayout.getTabCount() > 1);
-                    navigationBackMenuItem.setEnabled(currentWebView.canGoBack());
-                    navigationForwardMenuItem.setEnabled(currentWebView.canGoForward());
-                    navigationHistoryMenuItem.setEnabled((currentWebView.canGoBack() || currentWebView.canGoForward()));
-                    navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+            // Initialize the display names for the blocklists with the number of blocked requests.
+            blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+            easyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASY_LIST) + " - " + getString(R.string.easylist));
+            easyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASY_PRIVACY) + " - " + getString(R.string.easyprivacy));
+            fanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
+            fanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
+            ultraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRA_PRIVACY) + " - " + getString(R.string.ultraprivacy));
+            blockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
 
-                    // Hide the keyboard (if displayed).
-                    inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+            // Only modify third-party cookies if the API >= 21.
+            if (Build.VERSION.SDK_INT >= 21) {
+                // Set the status of the third-party cookies checkbox.
+                thirdPartyCookiesMenuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
 
-                    // Clear the focus from from the URL text box and the WebView.  This removes any text selection markers and context menus, which otherwise draw above the open drawers.
-                    urlEditText.clearFocus();
-                    currentWebView.clearFocus();
-                }
+                // Enable third-party cookies if first-party cookies are enabled.
+                thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
             }
-        });
 
-        // Create the hamburger icon at the start of the AppBar.
-        actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
+            // Enable DOM Storage if JavaScript is enabled.
+            domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
+        }
 
-        // Replace the header that `WebView` creates for `X-Requested-With` with a null value.  The default value is the application ID (com.stoutner.privacybrowser.standard).
-        customHeaders.put("X-Requested-With", "");
+        // Set the status of the menu item checkboxes.
+        firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
+        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
 
-        // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
-        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
+        // Enable Clear Cookies if there are any.
+        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
 
-        // Inflate a bare WebView to get the default user agent.  It is not used to render content on the screen.
-        @SuppressLint("InflateParams") View webViewLayout = getLayoutInflater().inflate(R.layout.bare_webview, null, false);
+        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
+        String privateDataDirectoryString = getApplicationInfo().dataDir;
 
-        // Get a handle for the WebView.
-        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
+        // Get a count of the number of files in the Local Storage directory.
+        File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
+        int localStorageDirectoryNumberOfFiles = 0;
+        if (localStorageDirectory.exists()) {
+            localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
+        }
 
-        // Store the default user agent.
-        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
+        // Get a count of the number of files in the IndexedDB directory.
+        File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
+        int indexedDBDirectoryNumberOfFiles = 0;
+        if (indexedDBDirectory.exists()) {
+            indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
+        }
 
-        // Destroy the bare WebView.
-        bareWebView.destroy();
-    }
+        // Enable Clear DOM Storage if there is any.
+        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
 
-    @Override
-    protected void onNewIntent(Intent intent) {
-        // Get the information from the intent.
-        String intentAction = intent.getAction();
-        Uri intentUriData = intent.getData();
+        // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
+        if (Build.VERSION.SDK_INT < 26) {
+            // Get the WebView database.
+            WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
 
-        // Only process the URI if it contains data.  If the user pressed the desktop icon after the app was already running the URI will be null.
-        if (intentUriData != null) {
-            // Sets the new intent as the activity intent, which replaces the one that originally started the app.
-            setIntent(intent);
+            // Enable the clear form data menu item if there is anything to clear.
+            clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
+        }
 
-            // Add a new tab.
-            addTab(null);
+        // Enable Clear Data if any of the submenu items are enabled.
+        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
 
-            // Create a URL string.
-            String url;
+        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
+        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
 
-            // If the intent action is a web search, perform the search.
-            if ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH)) {
-                // Create an encoded URL string.
-                String encodedUrlString;
+        // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
+        if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
+            menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
+        } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
+            menu.findItem(R.id.user_agent_webview_default).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
+            menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
+            menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
+            menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
+            menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
+            menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
+            menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
+            menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
+            menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
+            menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
+        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
+            menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
+        } else {  // Custom user agent.
+            menu.findItem(R.id.user_agent_custom).setChecked(true);
+        }
 
-                // Sanitize the search input and convert it to a search.
-                try {
-                    encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
-                } catch (UnsupportedEncodingException exception) {
-                    encodedUrlString = "";
-                }
+        // Instantiate the font size title and the selected font size menu item.
+        String fontSizeTitle;
+        MenuItem selectedFontSizeMenuItem;
 
-                // Add the base search URL.
-                url = searchURL + encodedUrlString;
-            } else {  // The intent should contain a URL.
-                // Set the intent data as the URL.
-                url = intentUriData.toString();
-            }
+        // Prepare the font size title and current size menu item.
+        switch (fontSize) {
+            case 25:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
+                break;
 
-            // Load the URL.
-            loadUrl(url);
+            case 50:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
+                break;
 
-            // Get a handle for the drawer layout.
-            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+            case 75:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
+                break;
 
-            // Close the navigation drawer if it is open.
-            if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
-                drawerLayout.closeDrawer(GravityCompat.START);
-            }
-
-            // Close the bookmarks drawer if it is open.
-            if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
-                drawerLayout.closeDrawer(GravityCompat.END);
-            }
-
-            // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
-            currentWebView.requestFocus();
-        }
-    }
-
-    @Override
-    public void onRestart() {
-        // Run the default commands.
-        super.onRestart();
-
-        // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
-        if (proxyThroughOrbot) {
-            // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
-            Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
-
-            // Send the intent to the Orbot package.
-            orbotIntent.setPackage("org.torproject.android");
-
-            // Make it so.
-            sendBroadcast(orbotIntent);
-        }
-
-        // Apply the app settings if returning from the Settings activity.
-        if (reapplyAppSettingsOnRestart) {
-            // Reset the reapply app settings on restart tracker.
-            reapplyAppSettingsOnRestart = false;
-
-            // Apply the app settings.
-            applyAppSettings();
-        }
-
-        // Apply the domain settings if returning from the settings or domains activity.
-        if (reapplyDomainSettingsOnRestart) {
-            // Reset the reapply domain settings on restart tracker.
-            reapplyDomainSettingsOnRestart = false;
-
-            // Reapply the domain settings for each tab.
-            for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-                // Get the WebView tab fragment.
-                WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
-
-                // Get the fragment view.
-                View fragmentView = webViewTabFragment.getView();
+            case 100:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                break;
 
-                // Only reload the WebViews if they exist.
-                if (fragmentView != null) {
-                    // Get the nested scroll WebView from the tab fragment.
-                    NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+            case 125:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
+                break;
 
-                    // Reset the current domain name so the domain settings will be reapplied.
-                    nestedScrollWebView.resetCurrentDomainName();
+            case 150:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
+                break;
 
-                    // Reapply the domain settings if the URL is not null, which can happen if an empty tab is active when returning from settings.
-                    if (nestedScrollWebView.getUrl() != null) {
-                        applyDomainSettings(nestedScrollWebView, nestedScrollWebView.getUrl(), false, true);
-                    }
-                }
-            }
-        }
+            case 175:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
+                break;
 
-        // Load the URL on restart (used when loading a bookmark).
-        if (loadUrlOnRestart) {
-            // Load the specified URL.
-            loadUrl(urlToLoadOnRestart);
+            case 200:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
+                break;
 
-            // Reset the load on restart tracker.
-            loadUrlOnRestart = false;
+            default:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                break;
         }
 
-        // Update the bookmarks drawer if returning from the Bookmarks activity.
-        if (restartFromBookmarksActivity) {
-            // Get a handle for the drawer layout.
-            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
-
-            // Close the bookmarks drawer.
-            drawerLayout.closeDrawer(GravityCompat.END);
-
-            // Reload the bookmarks drawer.
-            loadBookmarksFolder();
+        // Set the font size title and select the current size menu item.
+        fontSizeMenuItem.setTitle(fontSizeTitle);
+        selectedFontSizeMenuItem.setChecked(true);
 
-            // Reset `restartFromBookmarksActivity`.
-            restartFromBookmarksActivity = false;
-        }
+        // Run all the other default commands.
+        super.onPrepareOptionsMenu(menu);
 
-        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
-        updatePrivacyIcons(true);
+        // Display the menu.
+        return true;
     }
 
-    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
     @Override
-    public void onResume() {
-        // Run the default commands.
-        super.onResume();
-
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
-
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
-
-            // Only resume the WebViews if they exist (they won't when the app is first created).
-            if (fragmentView != null) {
-                // Get the nested scroll WebView from the tab fragment.
-                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
-
-                // Resume the nested scroll WebView JavaScript timers.
-                nestedScrollWebView.resumeTimers();
-
-                // Resume the nested scroll WebView.
-                nestedScrollWebView.onResume();
-            }
-        }
-
-        // Display a message to the user if waiting for Orbot.
-        if (waitingForOrbot && !orbotStatus.equals("ON")) {
-            // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
-            currentWebView.getSettings().setUseWideViewPort(false);
-
-            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
-            currentWebView.loadData("<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>", "text/html", null);
-        }
-
-        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
-            // Get a handle for the root frame layouts.
-            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
-
+    // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
+    @SuppressLint("SetJavaScriptEnabled")
+    public boolean onOptionsItemSelected(MenuItem menuItem) {
+        // Reenter full screen browsing mode if it was interrupted by the options menu.  <https://redmine.stoutner.com/issues/389>
+        if (inFullScreenBrowsingMode) {
             // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+
             /* Hide the system bars.
              * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
              * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
@@ -980,421 +919,66 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
              */
             rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                     View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-        } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // Resume the adView for the free flavor.
-            // Resume the ad.
-            AdHelper.resumeAd(findViewById(R.id.adview));
         }
-    }
-
-    @Override
-    public void onPause() {
-        // Run the default commands.
-        super.onPause();
 
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+        // Get the selected menu item ID.
+        int menuItemId = menuItem.getItemId();
 
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            // Only pause the WebViews if they exist (they won't when the app is first created).
-            if (fragmentView != null) {
-                // Get the nested scroll WebView from the tab fragment.
-                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-                // Pause the nested scroll WebView.
-                nestedScrollWebView.onPause();
+        // Run the commands that correlate to the selected menu item.
+        switch (menuItemId) {
+            case R.id.toggle_javascript:
+                // Toggle the JavaScript status.
+                currentWebView.getSettings().setJavaScriptEnabled(!currentWebView.getSettings().getJavaScriptEnabled());
 
-                // Pause the nested scroll WebView JavaScript timers.
-                nestedScrollWebView.pauseTimers();
-            }
-        }
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-        // Pause the ad or it will continue to consume resources in the background on the free flavor.
-        if (BuildConfig.FLAVOR.contentEquals("free")) {
-            // Pause the ad.
-            AdHelper.pauseAd(findViewById(R.id.adview));
-        }
-    }
+                // Display a `Snackbar`.
+                if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
+                } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
+                } else {  // Privacy mode.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
+                }
 
-    @Override
-    public void onDestroy() {
-        // Unregister the Orbot status broadcast receiver.
-        this.unregisterReceiver(orbotStatusBroadcastReceiver);
+                // Reload the current WebView.
+                currentWebView.reload();
+                return true;
 
-        // Close the bookmarks cursor and database.
-        bookmarksCursor.close();
-        bookmarksDatabaseHelper.close();
+            case R.id.add_or_edit_domain:
+                if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
+                    // Reapply the domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
 
-        // Run the default commands.
-        super.onDestroy();
-    }
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        // Inflate the menu.  This adds items to the action bar if it is present.
-        getMenuInflater().inflate(R.menu.webview_options_menu, menu);
+                    // Add the extra information to the intent.
+                    domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
+                    domainsIntent.putExtra("close_on_back", true);
+                    domainsIntent.putExtra("current_url", currentWebView.getUrl());
 
-        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
-        optionsMenu = menu;
+                    // Get the current certificate.
+                    SslCertificate sslCertificate = currentWebView.getCertificate();
 
-        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(false);
-
-        // Get handles for the menu items.
-        MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
-        MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
-        MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
-        MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
-        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
-        MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
-        MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
-
-        // Only display third-party cookies if API >= 21
-        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
-
-        // Only display the form data menu items if the API < 26.
-        toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
-        clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
-
-        // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
-        clearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
-
-        // Only show Ad Consent if this is the free flavor.
-        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
-
-        // Get the shared preference values.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
-
-        // Get the dark theme and app bar preferences..
-        boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
-        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
-
-        // Set the status of the additional app bar icons.  Setting the refresh menu item to `SHOW_AS_ACTION_ALWAYS` makes it appear even on small devices like phones.
-        if (displayAdditionalAppBarIcons) {
-            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
-            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
-            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
-        } else { //Do not display the additional icons.
-            toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-            toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-            refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
-        }
-
-        // Replace Refresh with Stop if a URL is already loading.
-        if (currentWebView != null && currentWebView.getProgress() != 100) {
-            // Set the title.
-            refreshMenuItem.setTitle(R.string.stop);
-
-            // If the icon is displayed in the AppBar, set it according to the theme.
-            if (displayAdditionalAppBarIcons) {
-                if (darkTheme) {
-                    refreshMenuItem.setIcon(R.drawable.close_dark);
-                } else {
-                    refreshMenuItem.setIcon(R.drawable.close_light);
-                }
-            }
-        }
-
-        return true;
-    }
-
-    @Override
-    public boolean onPrepareOptionsMenu(Menu menu) {
-        // Get handles for the menu items.
-        MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
-        MenuItem firstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
-        MenuItem thirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
-        MenuItem domStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
-        MenuItem saveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
-        MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
-        MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
-        MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
-        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
-        MenuItem blocklistsMenuItem = menu.findItem(R.id.blocklists);
-        MenuItem easyListMenuItem = menu.findItem(R.id.easylist);
-        MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
-        MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
-        MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
-        MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
-        MenuItem blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
-        MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
-        MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
-        MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
-        MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
-        MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
-
-        // Get a handle for the cookie manager.
-        CookieManager cookieManager = CookieManager.getInstance();
-
-        // Initialize the current user agent string and the font size.
-        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
-        int fontSize = 100;
-
-        // Set items that require the current web view to be populated.  It will be null when the program is first opened, as `onPrepareOptionsMenu()` is called before the first WebView is initialized.
-        if (currentWebView != null) {
-            // Set the add or edit domain text.
-            if (currentWebView.getDomainSettingsApplied()) {
-                addOrEditDomain.setTitle(R.string.edit_domain_settings);
-            } else {
-                addOrEditDomain.setTitle(R.string.add_domain_settings);
-            }
-
-            // Get the current user agent from the WebView.
-            currentUserAgent = currentWebView.getSettings().getUserAgentString();
-
-            // Get the current font size from the
-            fontSize = currentWebView.getSettings().getTextZoom();
-
-            // Set the status of the menu item checkboxes.
-            domStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
-            saveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
-            easyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
-            easyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
-            fanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
-            fanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
-            ultraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
-            blockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
-            swipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
-            displayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
-            nightModeMenuItem.setChecked(currentWebView.getNightMode());
-
-            // Initialize the display names for the blocklists with the number of blocked requests.
-            blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-            easyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASY_LIST) + " - " + getString(R.string.easylist));
-            easyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASY_PRIVACY) + " - " + getString(R.string.easyprivacy));
-            fanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
-            fanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
-            ultraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRA_PRIVACY) + " - " + getString(R.string.ultraprivacy));
-            blockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
-
-            // Only modify third-party cookies if the API >= 21.
-            if (Build.VERSION.SDK_INT >= 21) {
-                // Set the status of the third-party cookies checkbox.
-                thirdPartyCookiesMenuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
-
-                // Enable third-party cookies if first-party cookies are enabled.
-                thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
-            }
-
-            // Enable DOM Storage if JavaScript is enabled.
-            domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
-        }
-
-        // Set the status of the menu item checkboxes.
-        firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
-        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
-
-        // Enable Clear Cookies if there are any.
-        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
-
-        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
-        String privateDataDirectoryString = getApplicationInfo().dataDir;
-
-        // Get a count of the number of files in the Local Storage directory.
-        File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
-        int localStorageDirectoryNumberOfFiles = 0;
-        if (localStorageDirectory.exists()) {
-            localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
-        }
-
-        // Get a count of the number of files in the IndexedDB directory.
-        File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
-        int indexedDBDirectoryNumberOfFiles = 0;
-        if (indexedDBDirectory.exists()) {
-            indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
-        }
-
-        // Enable Clear DOM Storage if there is any.
-        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
-
-        // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
-        if (Build.VERSION.SDK_INT < 26) {
-            // Get the WebView database.
-            WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
-
-            // Enable the clear form data menu item if there is anything to clear.
-            clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
-        }
-
-        // Enable Clear Data if any of the submenu items are enabled.
-        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
-
-        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
-        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
-
-        // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
-        if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
-            menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
-        } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
-            menu.findItem(R.id.user_agent_webview_default).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
-            menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
-            menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
-            menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
-            menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
-            menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
-            menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
-            menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
-            menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
-            menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
-        } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
-            menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
-        } else {  // Custom user agent.
-            menu.findItem(R.id.user_agent_custom).setChecked(true);
-        }
-
-        // Instantiate the font size title and the selected font size menu item.
-        String fontSizeTitle;
-        MenuItem selectedFontSizeMenuItem;
-
-        // Prepare the font size title and current size menu item.
-        switch (fontSize) {
-            case 25:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
-                break;
-
-            case 50:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
-                break;
-
-            case 75:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
-                break;
-
-            case 100:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
-
-            case 125:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
-                break;
-
-            case 150:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
-                break;
-
-            case 175:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
-                break;
-
-            case 200:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
-                break;
-
-            default:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
-        }
-
-        // Set the font size title and select the current size menu item.
-        fontSizeMenuItem.setTitle(fontSizeTitle);
-        selectedFontSizeMenuItem.setChecked(true);
-
-        // Run all the other default commands.
-        super.onPrepareOptionsMenu(menu);
-
-        // Display the menu.
-        return true;
-    }
-
-    @Override
-    // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
-    @SuppressLint("SetJavaScriptEnabled")
-    public boolean onOptionsItemSelected(MenuItem menuItem) {
-        // Reenter full screen browsing mode if it was interrupted by the options menu.  <https://redmine.stoutner.com/issues/389>
-        if (inFullScreenBrowsingMode) {
-            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-
-            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
-
-            /* Hide the system bars.
-             * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-             * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
-             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
-             */
-            rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
-                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-        }
-
-        // Get the selected menu item ID.
-        int menuItemId = menuItem.getItemId();
-
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
-
-        // Get a handle for the cookie manager.
-        CookieManager cookieManager = CookieManager.getInstance();
-
-        // Run the commands that correlate to the selected menu item.
-        switch (menuItemId) {
-            case R.id.toggle_javascript:
-                // Toggle the JavaScript status.
-                currentWebView.getSettings().setJavaScriptEnabled(!currentWebView.getSettings().getJavaScriptEnabled());
-
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
-
-                // Display a `Snackbar`.
-                if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
-                } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
-                } else {  // Privacy mode.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
-                }
-
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
-
-            case R.id.add_or_edit_domain:
-                if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
-                    // Reapply the domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
-
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
-
-                    // Add the extra information to the intent.
-                    domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
-                    domainsIntent.putExtra("close_on_back", true);
-                    domainsIntent.putExtra("current_url", currentWebView.getUrl());
-
-                    // Get the current certificate.
-                    SslCertificate sslCertificate = currentWebView.getCertificate();
-
-                    // Check to see if the SSL certificate is populated.
-                    if (sslCertificate != null) {
-                        // Extract the certificate to strings.
-                        String issuedToCName = sslCertificate.getIssuedTo().getCName();
-                        String issuedToOName = sslCertificate.getIssuedTo().getOName();
-                        String issuedToUName = sslCertificate.getIssuedTo().getUName();
-                        String issuedByCName = sslCertificate.getIssuedBy().getCName();
-                        String issuedByOName = sslCertificate.getIssuedBy().getOName();
-                        String issuedByUName = sslCertificate.getIssuedBy().getUName();
-                        long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
-                        long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
+                    // Check to see if the SSL certificate is populated.
+                    if (sslCertificate != null) {
+                        // Extract the certificate to strings.
+                        String issuedToCName = sslCertificate.getIssuedTo().getCName();
+                        String issuedToOName = sslCertificate.getIssuedTo().getOName();
+                        String issuedToUName = sslCertificate.getIssuedTo().getUName();
+                        String issuedByCName = sslCertificate.getIssuedBy().getCName();
+                        String issuedByOName = sslCertificate.getIssuedBy().getOName();
+                        String issuedByUName = sslCertificate.getIssuedBy().getUName();
+                        long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
+                        long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
 
                         // Add the certificate to the intent.
                         domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
@@ -1875,19 +1459,19 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Update the swipe refresh layout.
                 if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
-                    if (Build.VERSION.SDK_INT >= 23) {  // For API >= 23, the status of the scroll refresh listener is continuously updated by the on scroll change listener.
-                        // Only enable the swipe refresh layout if the WebView is scrolled to the top.
-                        swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
-                    } else {  // For API < 23, the swipe refresh layout is always enabled.
-                        // Enable the swipe refresh layout.
-                        swipeRefreshLayout.setEnabled(true);
-                    }
+                    // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
+                    swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
                 } else {  // Swipe to refresh is disabled.
                     // Disable the swipe refresh layout.
                     swipeRefreshLayout.setEnabled(false);
                 }
                 return true;
 
+            case R.id.wide_viewport:
+                // Toggle the viewport.
+                currentWebView.getSettings().setUseWideViewPort(!currentWebView.getSettings().getUseWideViewPort());
+                return true;
+
             case R.id.display_images:
                 if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
                     // Disable loading of images.
@@ -1956,6 +1540,29 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }, 200);
                 return true;
 
+            case R.id.print:
+                // Get a print manager instance.
+                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+
+                // Remove the lint error below that print manager might be null.
+                assert printManager != null;
+
+                // Create a print document adapter from the current WebView.
+                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
+
+                // Print the document.
+                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
+                return true;
+
+            case R.id.add_to_homescreen:
+                // Instantiate the create home screen shortcut dialog.
+                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
+                        currentWebView.getFavoriteOrDefaultIcon());
+
+                // Show the create home screen shortcut dialog.
+                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
+                return true;
+
             case R.id.view_source:
                 // Create an intent to launch the view source activity.
                 Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
@@ -1978,1406 +1585,1629 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 shareIntent.setType("text/plain");
 
                 // Make it so.
-                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
-                return true;
-
-            case R.id.print:
-                // Get a print manager instance.
-                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
+                return true;
+
+            case R.id.open_with_app:
+                openWithApp(currentWebView.getUrl());
+                return true;
+
+            case R.id.open_with_browser:
+                openWithBrowser(currentWebView.getUrl());
+                return true;
+
+            case R.id.proxy_through_orbot:
+                // Toggle the proxy through Orbot variable.
+                proxyThroughOrbot = !proxyThroughOrbot;
+
+                // Apply the proxy through Orbot settings.
+                applyProxyThroughOrbot(true);
+                return true;
+
+            case R.id.refresh:
+                if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
+                    // Reload the current WebView.
+                    currentWebView.reload();
+                } else {  // The stop button was pushed.
+                    // Stop the loading of the WebView.
+                    currentWebView.stopLoading();
+                }
+                return true;
+
+            case R.id.ad_consent:
+                // Display the ad consent dialog.
+                DialogFragment adConsentDialogFragment = new AdConsentDialog();
+                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
+                return true;
+
+            default:
+                // Don't consume the event.
+                return super.onOptionsItemSelected(menuItem);
+        }
+    }
+
+    // removeAllCookies is deprecated, but it is required for API < 21.
+    @Override
+    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
+        // Get the menu item ID.
+        int menuItemId = menuItem.getItemId();
+
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Run the commands that correspond to the selected menu item.
+        switch (menuItemId) {
+            case R.id.clear_and_exit:
+                // Clear and exit Privacy Browser.
+                clearAndExit();
+                break;
+
+            case R.id.home:
+                // Select the homepage based on the proxy through Orbot status.
+                if (proxyThroughOrbot) {
+                    // Load the Tor homepage.
+                    loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
+                } else {
+                    // Load the normal homepage.
+                    loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+                }
+                break;
+
+            case R.id.back:
+                if (currentWebView.canGoBack()) {
+                    // Reset the current domain name so that navigation works if third-party requests are blocked.
+                    currentWebView.resetCurrentDomainName();
+
+                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
+                    currentWebView.setNavigatingHistory(true);
+
+                    // Load the previous website in the history.
+                    currentWebView.goBack();
+                }
+                break;
+
+            case R.id.forward:
+                if (currentWebView.canGoForward()) {
+                    // Reset the current domain name so that navigation works if third-party requests are blocked.
+                    currentWebView.resetCurrentDomainName();
+
+                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
+                    currentWebView.setNavigatingHistory(true);
+
+                    // Load the next website in the history.
+                    currentWebView.goForward();
+                }
+                break;
+
+            case R.id.history:
+                // Instantiate the URL history dialog.
+                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
+
+                // Show the URL history dialog.
+                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
+                break;
+
+            case R.id.requests:
+                // Populate the resource requests.
+                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
+
+                // Create an intent to launch the Requests activity.
+                Intent requestsIntent = new Intent(this, RequestsActivity.class);
+
+                // Add the block third-party requests status to the intent.
+                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+
+                // Make it so.
+                startActivity(requestsIntent);
+                break;
+
+            case R.id.downloads:
+                // Launch the system Download Manager.
+                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+
+                // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
+                downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+                startActivity(downloadManagerIntent);
+                break;
+
+            case R.id.domains:
+                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
+                reapplyDomainSettingsOnRestart = true;
+
+                // Launch the domains activity.
+                Intent domainsIntent = new Intent(this, DomainsActivity.class);
+
+                // Add the extra information to the intent.
+                domainsIntent.putExtra("current_url", currentWebView.getUrl());
+
+                // Get the current certificate.
+                SslCertificate sslCertificate = currentWebView.getCertificate();
+
+                // Check to see if the SSL certificate is populated.
+                if (sslCertificate != null) {
+                    // Extract the certificate to strings.
+                    String issuedToCName = sslCertificate.getIssuedTo().getCName();
+                    String issuedToOName = sslCertificate.getIssuedTo().getOName();
+                    String issuedToUName = sslCertificate.getIssuedTo().getUName();
+                    String issuedByCName = sslCertificate.getIssuedBy().getCName();
+                    String issuedByOName = sslCertificate.getIssuedBy().getOName();
+                    String issuedByUName = sslCertificate.getIssuedBy().getUName();
+                    long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
+                    long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
+
+                    // Add the certificate to the intent.
+                    domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
+                    domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
+                    domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
+                    domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
+                    domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
+                    domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
+                    domainsIntent.putExtra("ssl_start_date", startDateLong);
+                    domainsIntent.putExtra("ssl_end_date", endDateLong);
+                }
+
+                // Check to see if the current IP addresses have been received.
+                if (currentWebView.hasCurrentIpAddresses()) {
+                    // Add the current IP addresses to the intent.
+                    domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
+                }
+
+                // Make it so.
+                startActivity(domainsIntent);
+                break;
 
-                // Remove the lint error below that print manager might be null.
-                assert printManager != null;
+            case R.id.settings:
+                // Set the flag to reapply app settings on restart when returning from Settings.
+                reapplyAppSettingsOnRestart = true;
 
-                // Create a print document adapter from the current WebView.
-                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
+                // Set the flag to reapply the domain settings on restart when returning from Settings.
+                reapplyDomainSettingsOnRestart = true;
 
-                // Print the document.
-                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
-                return true;
+                // Launch the settings activity.
+                Intent settingsIntent = new Intent(this, SettingsActivity.class);
+                startActivity(settingsIntent);
+                break;
 
-            case R.id.open_with_app:
-                openWithApp(currentWebView.getUrl());
-                return true;
+            case R.id.import_export:
+                // Launch the import/export activity.
+                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
+                startActivity(importExportIntent);
+                break;
 
-            case R.id.open_with_browser:
-                openWithBrowser(currentWebView.getUrl());
-                return true;
+            case R.id.logcat:
+                // Launch the logcat activity.
+                Intent logcatIntent = new Intent(this, LogcatActivity.class);
+                startActivity(logcatIntent);
+                break;
 
-            case R.id.add_to_homescreen:
-                // Instantiate the create home screen shortcut dialog.
-                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
-                        currentWebView.getFavoriteOrDefaultIcon());
+            case R.id.guide:
+                // Launch `GuideActivity`.
+                Intent guideIntent = new Intent(this, GuideActivity.class);
+                startActivity(guideIntent);
+                break;
 
-                // Show the create home screen shortcut dialog.
-                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
-                return true;
+            case R.id.about:
+                // Create an intent to launch the about activity.
+                Intent aboutIntent = new Intent(this, AboutActivity.class);
 
-            case R.id.proxy_through_orbot:
-                // Toggle the proxy through Orbot variable.
-                proxyThroughOrbot = !proxyThroughOrbot;
+                // Create a string array for the blocklist versions.
+                String[] blocklistVersions = new String[] {easyList.get(0).get(0)[0], easyPrivacy.get(0).get(0)[0], fanboysAnnoyanceList.get(0).get(0)[0], fanboysSocialList.get(0).get(0)[0],
+                        ultraPrivacy.get(0).get(0)[0]};
 
-                // Apply the proxy through Orbot settings.
-                applyProxyThroughOrbot(true);
-                return true;
+                // Add the blocklist versions to the intent.
+                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
 
-            case R.id.refresh:
-                if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
-                    // Reload the current WebView.
-                    currentWebView.reload();
-                } else {  // The stop button was pushed.
-                    // Stop the loading of the WebView.
-                    currentWebView.stopLoading();
-                }
-                return true;
+                // Make it so.
+                startActivity(aboutIntent);
+                break;
+        }
 
-            case R.id.ad_consent:
-                // Display the ad consent dialog.
-                DialogFragment adConsentDialogFragment = new AdConsentDialog();
-                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
-                return true;
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-            default:
-                // Don't consume the event.
-                return super.onOptionsItemSelected(menuItem);
-        }
+        // Close the navigation drawer.
+        drawerLayout.closeDrawer(GravityCompat.START);
+        return true;
     }
 
-    // removeAllCookies is deprecated, but it is required for API < 21.
     @Override
-    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
-        // Get the menu item ID.
-        int menuItemId = menuItem.getItemId();
+    public void onPostCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onPostCreate(savedInstanceState);
 
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
+        actionBarDrawerToggle.syncState();
+    }
 
-        // Run the commands that correspond to the selected menu item.
-        switch (menuItemId) {
-            case R.id.close_tab:
-                // Get a handle for the tab layout and the view pager.
-                TabLayout tabLayout = findViewById(R.id.tablayout);
-                ViewPager webViewPager = findViewById(R.id.webviewpager);
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        // Run the default commands.
+        super.onConfigurationChanged(newConfig);
 
-                // Get the current tab number.
-                int currentTabNumber = tabLayout.getSelectedTabPosition();
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-                // Delete the current tab.
-                tabLayout.removeTabAt(currentTabNumber);
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-                // Delete the current page.  If the selected page number did not change during the delete, it will return true, meaning that the current WebView must be reset.
-                if (webViewPagerAdapter.deletePage(currentTabNumber, webViewPager)) {
-                    setCurrentWebView(currentTabNumber);
-                }
-                break;
+        // Recalculate the drawer header padding.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
 
-            case R.id.clear_and_exit:
-                // Close the bookmarks cursor and database.
-                bookmarksCursor.close();
-                bookmarksDatabaseHelper.close();
+        // Reload the ad for the free flavor if not in full screen mode.
+        if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
+            // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
+            AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
+        }
 
-                // Get the status of the clear everything preference.
-                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
+        // https://code.google.com/p/android/issues/detail?id=20493#c8
+        // ActivityCompat.invalidateOptionsMenu(this);
+    }
 
-                // Get a handle for the runtime.
-                Runtime runtime = Runtime.getRuntime();
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
+        // Store the hit test result.
+        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
 
-                // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
-                // which links to `/data/data/com.stoutner.privacybrowser.standard`.
-                String privateDataDirectoryString = getApplicationInfo().dataDir;
+        // Create the URL strings.
+        final String imageUrl;
+        final String linkUrl;
 
-                // Clear cookies.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
-                    // The command to remove cookies changed slightly in API 21.
-                    if (Build.VERSION.SDK_INT >= 21) {
-                        CookieManager.getInstance().removeAllCookies(null);
-                    } else {
-                        CookieManager.getInstance().removeAllCookie();
-                    }
+        // Get handles for the system managers.
+        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+        FragmentManager fragmentManager = getSupportFragmentManager();
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
-                    try {
-                        // Two commands must be used because `Runtime.exec()` does not like `*`.
-                        Process deleteCookiesProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
-                        Process deleteCookiesJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
-
-                        // Wait until the processes have finished.
-                        deleteCookiesProcess.waitFor();
-                        deleteCookiesJournalProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+        // Remove the lint errors below that the clipboard manager might be null.
+        assert clipboardManager != null;
 
-                // Clear DOM storage.
-                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                    // Ask `WebStorage` to clear the DOM storage.
-                    WebStorage webStorage = WebStorage.getInstance();
-                    webStorage.deleteAllData();
+        // Process the link according to the type.
+        switch (hitTestResult.getType()) {
+            // `SRC_ANCHOR_TYPE` is a link.
+            case WebView.HitTestResult.SRC_ANCHOR_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
 
-                    // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
-                    try {
-                        // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
-                        Process deleteLocalStorageProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
-
-                        // Multiple commands must be used because `Runtime.exec()` does not like `*`.
-                        Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
-                        Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
-                        Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
-                        Process deleteDatabaseProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
-
-                        // Wait until the processes have finished.
-                        deleteLocalStorageProcess.waitFor();
-                        deleteIndexProcess.waitFor();
-                        deleteQuotaManagerProcess.waitFor();
-                        deleteQuotaManagerJournalProcess.waitFor();
-                        deleteDatabaseProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-                // Clear form data if the API < 26.
-                if ((Build.VERSION.SDK_INT < 26) && (clearEverything || sharedPreferences.getBoolean("clear_form_data", true))) {
-                    WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
-                    webViewDatabase.clearFormData();
+                // Add an Open in New Tab entry.
+                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the link URL in a new tab.
+                    addNewTab(linkUrl);
+                    return false;
+                });
 
-                    // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
-                    try {
-                        // A string array must be used because the database contains a space and `Runtime.exec` will not otherwise escape the string correctly.
-                        Process deleteWebDataProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
-                        Process deleteWebDataJournalProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
-
-                        // Wait until the processes have finished.
-                        deleteWebDataProcess.waitFor();
-                        deleteWebDataJournalProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(linkUrl);
+                    return false;
+                });
 
-                // Clear the cache.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
-                    // Clear the cache from each WebView.
-                    for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-                        // Get the WebView tab fragment.
-                        WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(linkUrl);
+                    return false;
+                });
 
-                        // Get the fragment view.
-                        View fragmentView = webViewTabFragment.getView();
+                // Add a Copy URL entry.
+                menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Save the link URL in a `ClipData`.
+                    ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
 
-                        // Only clear the cache if the WebView exists.
-                        if (fragmentView != null) {
-                            // Get the nested scroll WebView from the tab fragment.
-                            NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
+                    return false;
+                });
 
-                            // Clear the cache for this WebView.
-                            nestedScrollWebView.clearCache(true);
-                        }
-                    }
+                // Add a Download URL entry.
+                menu.add(R.string.download_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(linkUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the variables for future use by `onRequestPermissionsResult()`.
+                            downloadUrl = linkUrl;
+                            downloadContentDisposition = "none";
+                            downloadContentLength = -1;
 
-                    // Manually delete the cache directories.
-                    try {
-                        // Delete the main cache directory.
-                        Process deleteCacheProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+                            // Show a dialog if the user has previously denied the permission.
+                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
+                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
+                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
 
-                        // Delete the secondary `Service Worker` cache directory.
-                        // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
-                        Process deleteServiceWorkerProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
+                                // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
+                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
+                            } else {  // Show the permission request directly.
+                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
+                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
+                            }
+                        } else {  // The storage permission has already been granted.
+                            // Get a handle for the download file alert dialog.
+                            DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(linkUrl, "none", -1);
 
-                        // Wait until the processes have finished.
-                        deleteCacheProcess.waitFor();
-                        deleteServiceWorkerProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
+                            // Show the download file alert dialog.
+                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
                     }
-                }
-
-                // Wipe out each WebView.
-                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-                    // Get the WebView tab fragment.
-                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+                    return false;
+                });
 
-                    // Get the fragment view.
-                    View fragmentView = webViewTabFragment.getView();
+                // Add a Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
 
-                    // Only wipe out the WebView if it exists.
-                    if (fragmentView != null) {
-                        // Get the nested scroll WebView from the tab fragment.
-                        NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+            case WebView.HitTestResult.EMAIL_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
 
-                        // Clear SSL certificate preferences for this WebView.
-                        nestedScrollWebView.clearSslPreferences();
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-                        // Clear the back/forward history for this WebView.
-                        nestedScrollWebView.clearHistory();
+                // Add a Write Email entry.
+                menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
+                    // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
+                    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
 
-                        // Destroy the internal state of `mainWebView`.
-                        nestedScrollWebView.destroy();
-                    }
-                }
+                    // Parse the url and set it as the data for the `Intent`.
+                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
 
-                // Clear the custom headers.
-                customHeaders.clear();
+                    // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
+                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-                // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
-                // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
-                if (clearEverything) {
-                    try {
-                        // Delete the folder.
-                        Process deleteAppWebviewProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
+                    // Make it so.
+                    startActivity(emailIntent);
+                    return false;
+                });
 
-                        // Wait until the process has finished.
-                        deleteAppWebviewProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+                // Add a Copy Email Address entry.
+                menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
+                    // Save the email address in a `ClipData`.
+                    ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
 
-                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    finishAndRemoveTask();
-                } else {
-                    finish();
-                }
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
+                    return false;
+                });
 
-                // Remove the terminated program from RAM.  The status code is `0`.
-                System.exit(0);
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
                 break;
 
-            case R.id.home:
-                // Select the homepage based on the proxy through Orbot status.
-                if (proxyThroughOrbot) {
-                    // Load the Tor homepage.
-                    loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
-                } else {
-                    // Load the normal homepage.
-                    loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
-                }
-                break;
+            // `IMAGE_TYPE` is an image. `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.  Privacy Browser processes them the same.
+            case WebView.HitTestResult.IMAGE_TYPE:
+            case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
+                // Get the image URL.
+                imageUrl = hitTestResult.getExtra();
 
-            case R.id.back:
-                if (currentWebView.canGoBack()) {
-                    // Reset the current domain name so that navigation works if third-party requests are blocked.
-                    currentWebView.resetCurrentDomainName();
+                // Set the image URL as the title of the context menu.
+                menu.setHeaderTitle(imageUrl);
 
-                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
-                    currentWebView.setNavigatingHistory(true);
+                // Add an Open in New Tab entry.
+                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the image URL in a new tab.
+                    addNewTab(imageUrl);
+                    return false;
+                });
 
-                    // Load the previous website in the history.
-                    currentWebView.goBack();
-                }
-                break;
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    loadUrl(imageUrl);
+                    return false;
+                });
 
-            case R.id.forward:
-                if (currentWebView.canGoForward()) {
-                    // Reset the current domain name so that navigation works if third-party requests are blocked.
-                    currentWebView.resetCurrentDomainName();
+                // Add a `Download Image` entry.
+                menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(imageUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the image URL for use by `onRequestPermissionResult()`.
+                            downloadImageUrl = imageUrl;
 
-                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
-                    currentWebView.setNavigatingHistory(true);
+                            // Show a dialog if the user has previously denied the permission.
+                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
+                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
+                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
 
-                    // Load the next website in the history.
-                    currentWebView.goForward();
-                }
-                break;
+                                // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
+                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
+                            } else {  // Show the permission request directly.
+                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
+                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
+                            }
+                        } else {  // The storage permission has already been granted.
+                            // Get a handle for the download image alert dialog.
+                            DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
 
-            case R.id.history:
-                // Instantiate the URL history dialog.
-                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
+                    return false;
+                });
 
-                // Show the URL history dialog.
-                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
-                break;
+                // Add a `Copy URL` entry.
+                menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
+                    // Save the image URL in a `ClipData`.
+                    ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
 
-            case R.id.requests:
-                // Populate the resource requests.
-                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
+                    return false;
+                });
 
-                // Create an intent to launch the Requests activity.
-                Intent requestsIntent = new Intent(this, RequestsActivity.class);
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(imageUrl);
+                    return false;
+                });
 
-                // Add the block third-party requests status to the intent.
-                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(imageUrl);
+                    return false;
+                });
 
-                // Make it so.
-                startActivity(requestsIntent);
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
                 break;
+        }
+    }
 
-            case R.id.downloads:
-                // Launch the system Download Manager.
-                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+    @Override
+    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-                // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
-                downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        // Get the views from the dialog fragment.
+        EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
+        EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 
-                startActivity(downloadManagerIntent);
-                break;
+        // Extract the strings from the edit texts.
+        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 
-            case R.id.domains:
-                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
-                reapplyDomainSettingsOnRestart = true;
+        // Create a favorite icon byte array output stream.
+        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Launch the domains activity.
-                Intent domainsIntent = new Intent(this, DomainsActivity.class);
+        // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 
-                // Add the extra information to the intent.
-                domainsIntent.putExtra("current_url", currentWebView.getUrl());
+        // Convert the favorite icon byte array stream to a byte array.
+        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-                // Get the current certificate.
-                SslCertificate sslCertificate = currentWebView.getCertificate();
+        // Display the new bookmark below the current items in the (0 indexed) list.
+        int newBookmarkDisplayOrder = bookmarksListView.getCount();
 
-                // Check to see if the SSL certificate is populated.
-                if (sslCertificate != null) {
-                    // Extract the certificate to strings.
-                    String issuedToCName = sslCertificate.getIssuedTo().getCName();
-                    String issuedToOName = sslCertificate.getIssuedTo().getOName();
-                    String issuedToUName = sslCertificate.getIssuedTo().getUName();
-                    String issuedByCName = sslCertificate.getIssuedBy().getCName();
-                    String issuedByOName = sslCertificate.getIssuedBy().getOName();
-                    String issuedByUName = sslCertificate.getIssuedBy().getUName();
-                    long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
-                    long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
+        // Create the bookmark.
+        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 
-                    // Add the certificate to the intent.
-                    domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
-                    domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
-                    domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
-                    domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
-                    domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
-                    domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
-                    domainsIntent.putExtra("ssl_start_date", startDateLong);
-                    domainsIntent.putExtra("ssl_end_date", endDateLong);
-                }
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Check to see if the current IP addresses have been received.
-                if (currentWebView.hasCurrentIpAddresses()) {
-                    // Add the current IP addresses to the intent.
-                    domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
-                }
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                // Make it so.
-                startActivity(domainsIntent);
-                break;
+        // Scroll to the new bookmark.
+        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    }
 
-            case R.id.settings:
-                // Set the flag to reapply app settings on restart when returning from Settings.
-                reapplyAppSettingsOnRestart = true;
+    @Override
+    public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-                // Set the flag to reapply the domain settings on restart when returning from Settings.
-                reapplyDomainSettingsOnRestart = true;
+        // Get handles for the views in the dialog fragment.
+        EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
+        RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
+        ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
 
-                // Launch the settings activity.
-                Intent settingsIntent = new Intent(this, SettingsActivity.class);
-                startActivity(settingsIntent);
-                break;
+        // Get new folder name string.
+        String folderNameString = createFolderNameEditText.getText().toString();
 
-            case R.id.import_export:
-                // Launch the import/export activity.
-                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
-                startActivity(importExportIntent);
-                break;
+        // Create a folder icon bitmap.
+        Bitmap folderIconBitmap;
 
-            case R.id.logcat:
-                // Launch the logcat activity.
-                Intent logcatIntent = new Intent(this, LogcatActivity.class);
-                startActivity(logcatIntent);
-                break;
+        // Set the folder icon bitmap according to the dialog.
+        if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
+            // Get the default folder icon drawable.
+            Drawable folderIconDrawable = folderIconImageView.getDrawable();
 
-            case R.id.guide:
-                // Launch `GuideActivity`.
-                Intent guideIntent = new Intent(this, GuideActivity.class);
-                startActivity(guideIntent);
-                break;
+            // Convert the folder icon drawable to a bitmap drawable.
+            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-            case R.id.about:
-                // Create an intent to launch the about activity.
-                Intent aboutIntent = new Intent(this, AboutActivity.class);
+            // Convert the folder icon bitmap drawable to a bitmap.
+            folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+        } else {  // Use the WebView favorite icon.
+            // Copy the favorite icon bitmap to the folder icon bitmap.
+            folderIconBitmap = favoriteIconBitmap;
+        }
 
-                // Create a string array for the blocklist versions.
-                String[] blocklistVersions = new String[] {easyList.get(0).get(0)[0], easyPrivacy.get(0).get(0)[0], fanboysAnnoyanceList.get(0).get(0)[0], fanboysSocialList.get(0).get(0)[0],
-                        ultraPrivacy.get(0).get(0)[0]};
+        // Create a folder icon byte array output stream.
+        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Add the blocklist versions to the intent.
-                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
+        // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 
-                // Make it so.
-                startActivity(aboutIntent);
-                break;
+        // Convert the folder icon byte array stream to a byte array.
+        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+
+        // Move all the bookmarks down one in the display order.
+        for (int i = 0; i < bookmarksListView.getCount(); i++) {
+            int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
+            bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
         }
 
-        // Get a handle for the drawer layout.
-        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        // Create the folder, which will be placed at the top of the `ListView`.
+        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
 
-        // Close the navigation drawer.
-        drawerLayout.closeDrawer(GravityCompat.START);
-        return true;
-    }
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-    @Override
-    public void onPostCreate(Bundle savedInstanceState) {
-        // Run the default commands.
-        super.onPostCreate(savedInstanceState);
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
-        actionBarDrawerToggle.syncState();
+        // Scroll to the new folder.
+        bookmarksListView.setSelection(0);
     }
 
     @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        // Run the default commands.
-        super.onConfigurationChanged(newConfig);
+    public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
+        // Get handles for the views from `dialogFragment`.
+        EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
+        EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
+        RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 
-        // Get the status bar pixel size.
-        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
-        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+        // Store the bookmark strings.
+        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 
-        // Get the resource density.
-        float screenDensity = getResources().getDisplayMetrics().density;
+        // Update the bookmark.
+        if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
+        } else {  // Update the bookmark using the `WebView` favorite icon.
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-        // Recalculate the drawer header padding.
-        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
-        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
-        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
+            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 
-        // Reload the ad for the free flavor if not in full screen mode.
-        if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
-            // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-            AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
+
+            //  Update the bookmark and the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
         }
 
-        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
-        // https://code.google.com/p/android/issues/detail?id=20493#c8
-        // ActivityCompat.invalidateOptionsMenu(this);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
     }
 
     @Override
-    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
-        // Store the hit test result.
-        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
-
-        // Create the URL strings.
-        final String imageUrl;
-        final String linkUrl;
-
-        // Get handles for the system managers.
-        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
-        FragmentManager fragmentManager = getSupportFragmentManager();
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
-
-        // Remove the lint errors below that the clipboard manager might be null.
-        assert clipboardManager != null;
-
-        // Process the link according to the type.
-        switch (hitTestResult.getType()) {
-            // `SRC_ANCHOR_TYPE` is a link.
-            case WebView.HitTestResult.SRC_ANCHOR_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
-
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
-
-                // Add a Load URL entry.
-                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Add a new tab.
-                    addTab(null);
+    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
+        // Get handles for the views from `dialogFragment`.
+        EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
+        RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
+        RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
+        ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
 
-                    // Load the URL.
-                    loadUrl(linkUrl);
-                    return false;
-                });
+        // Get the new folder name.
+        String newFolderNameString = editFolderNameEditText.getText().toString();
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(linkUrl);
-                    return false;
-                });
+        // Check if the favorite icon has changed.
+        if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
+            // Update the name in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
+        } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
+            // Create the new folder icon Bitmap.
+            Bitmap folderIconBitmap;
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(linkUrl);
-                    return false;
-                });
+            // Populate the new folder icon bitmap.
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 
-                // Add a Copy URL entry.
-                menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Save the link URL in a `ClipData`.
-                    ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
-                    return false;
-                });
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Copy the favorite icon bitmap to the folder icon bitmap.
+                folderIconBitmap = favoriteIconBitmap;
+            }
 
-                // Add a Download URL entry.
-                menu.add(R.string.download_url).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Check if the download should be processed by an external app.
-                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
-                        openUrlWithExternalApp(linkUrl);
-                    } else {  // Download with Android's download manager.
-                        // Check to see if the storage permission has already been granted.
-                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
-                            // Store the variables for future use by `onRequestPermissionsResult()`.
-                            downloadUrl = linkUrl;
-                            downloadContentDisposition = "none";
-                            downloadContentLength = -1;
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                            // Show a dialog if the user has previously denied the permission.
-                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
-                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
 
-                                // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
-                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
-                            } else {  // Show the permission request directly.
-                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
-                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
-                            }
-                        } else {  // The storage permission has already been granted.
-                            // Get a handle for the download file alert dialog.
-                            DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(linkUrl, "none", -1);
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-                            // Show the download file alert dialog.
-                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+            // Update the folder icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, newFolderIconByteArray);
+        } else {  // The folder icon and the name have changed.
+            // Get the new folder icon `Bitmap`.
+            Bitmap folderIconBitmap;
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 
-                // Add a Cancel entry, which by default closes the context menu.
-                menu.add(R.string.cancel);
-                break;
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-            case WebView.HitTestResult.EMAIL_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Copy the favorite icon bitmap to the folder icon bitmap.
+                folderIconBitmap = favoriteIconBitmap;
+            }
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Add a Write Email entry.
-                menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
-                    // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
-                    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
 
-                    // Parse the url and set it as the data for the `Intent`.
-                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-                    // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
-                    emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+            // Update the folder name and icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+        }
 
-                    // Make it so.
-                    startActivity(emailIntent);
-                    return false;
-                });
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Add a Copy Email Address entry.
-                menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
-                    // Save the email address in a `ClipData`.
-                    ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
-                    return false;
-                });
+    @Override
+    public void onCloseDownloadLocationPermissionDialog(int downloadType) {
+        switch (downloadType) {
+            case DownloadLocationPermissionDialog.DOWNLOAD_FILE:
+                // Request the WRITE_EXTERNAL_STORAGE permission with a file request code.
+                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
+                break;
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
+            case DownloadLocationPermissionDialog.DOWNLOAD_IMAGE:
+                // Request the WRITE_EXTERNAL_STORAGE permission with an image request code.
+                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
                 break;
+        }
+    }
 
-            // `IMAGE_TYPE` is an image.
-            case WebView.HitTestResult.IMAGE_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        // Get a handle for the fragment manager.
+        FragmentManager fragmentManager = getSupportFragmentManager();
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+        switch (requestCode) {
+            case DOWNLOAD_FILE_REQUEST_CODE:
+                // Show the download file alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
+                DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, downloadContentDisposition, downloadContentLength);
 
-                // Add a View Image entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+                // On API 23, displaying the fragment must be delayed or the app will crash.
+                if (Build.VERSION.SDK_INT == 23) {
+                    new Handler().postDelayed(() -> downloadFileDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
+                } else {
+                    downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                }
 
-                // Add a Download Image entry.
-                menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Check if the download should be processed by an external app.
-                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
-                        openUrlWithExternalApp(imageUrl);
-                    } else {  // Download with Android's download manager.
-                        // Check to see if the storage permission has already been granted.
-                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
-                            // Store the image URL for use by `onRequestPermissionResult()`.
-                            downloadImageUrl = imageUrl;
+                // Reset the download variables.
+                downloadUrl = "";
+                downloadContentDisposition = "";
+                downloadContentLength = 0;
+                break;
 
-                            // Show a dialog if the user has previously denied the permission.
-                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
-                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
+            case DOWNLOAD_IMAGE_REQUEST_CODE:
+                // Show the download image alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
+                DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(downloadImageUrl);
 
-                                // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
-                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
-                            } else {  // Show the permission request directly.
-                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
-                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
-                            }
-                        } else {  // The storage permission has already been granted.
-                            // Get a handle for the download image alert dialog.
-                            DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
+                // On API 23, displaying the fragment must be delayed or the app will crash.
+                if (Build.VERSION.SDK_INT == 23) {
+                    new Handler().postDelayed(() -> downloadImageDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
+                } else {
+                    downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                }
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+                // Reset the image URL variable.
+                downloadImageUrl = "";
+                break;
+        }
+    }
 
-                // Add a Copy URL entry.
-                menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
-                    // Save the image URL in a `ClipData`.
-                    ClipData srcImageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
+    @Override
+    public void onDownloadImage(DialogFragment dialogFragment, String imageUrl) {
+        // Download the image if it has an HTTP or HTTPS URI.
+        if (imageUrl.startsWith("http")) {
+            // Get a handle for the system `DOWNLOAD_SERVICE`.
+            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageTypeClipData);
-                    return false;
-                });
+            // Parse `imageUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(imageUrl);
-                    return false;
-                });
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(imageUrl);
-                    return false;
-                });
+            // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
+            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
+            if (cookieManager.acceptCookie()) {
+                // Get the cookies for `imageUrl`.
+                String cookies = cookieManager.getCookie(imageUrl);
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
+            // Get the file name from the dialog fragment.
+            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
+            String imageName = downloadImageNameEditText.getText().toString();
 
-            // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
-            case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+            // Specify the download location.
+            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
+                // Download to the public download directory.
+                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, imageName);
+            } else {  // External write permission denied.
+                // Download to the app's external download directory.
+                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, imageName);
+            }
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-                // Add a `View Image` entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(imageUrl);
 
-                // Add a `Download Image` entry.
-                menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Check if the download should be processed by an external app.
-                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
-                        openUrlWithExternalApp(imageUrl);
-                    } else {  // Download with Android's download manager.
-                        // Check to see if the storage permission has already been granted.
-                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
-                            // Store the image URL for use by `onRequestPermissionResult()`.
-                            downloadImageUrl = imageUrl;
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-                            // Show a dialog if the user has previously denied the permission.
-                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
-                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-                                // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
-                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
-                            } else {  // Show the permission request directly.
-                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
-                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
-                            }
-                        } else {  // The storage permission has already been granted.
-                            // Get a handle for the download image alert dialog.
-                            DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
+            // Initiate the download.
+            downloadManager.enqueue(downloadRequest);
+        } else {  // The image is not an HTTP or HTTPS URI.
+            Snackbar.make(currentWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
+        }
+    }
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+    @Override
+    public void onDownloadFile(DialogFragment dialogFragment, String downloadUrl) {
+        // Download the file if it has an HTTP or HTTPS URI.
+        if (downloadUrl.startsWith("http")) {
+            // Get a handle for the system `DOWNLOAD_SERVICE`.
+            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
 
-                // Add a `Copy URL` entry.
-                menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
-                    // Save the image URL in a `ClipData`.
-                    ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
+            // Parse `downloadUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
-                    return false;
-                });
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(imageUrl);
-                    return false;
-                });
+            // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
+            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
+            if (cookieManager.acceptCookie()) {
+                // Get the cookies for `downloadUrl`.
+                String cookies = cookieManager.getCookie(downloadUrl);
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(imageUrl);
-                    return false;
-                });
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
-        }
-    }
+            // Get the file name from the dialog fragment.
+            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
+            String fileName = downloadFileNameEditText.getText().toString();
 
-    @Override
-    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
-        // Get a handle for the bookmarks list view.
-        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+            // Specify the download location.
+            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
+                // Download to the public download directory.
+                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
+            } else {  // External write permission denied.
+                // Download to the app's external download directory.
+                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, fileName);
+            }
 
-        // Get the views from the dialog fragment.
-        EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
-        EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-        // Extract the strings from the edit texts.
-        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(downloadUrl);
 
-        // Create a favorite icon byte array output stream.
-        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-        // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-        favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-        // Convert the favorite icon byte array stream to a byte array.
-        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+            // Initiate the download.
+            downloadManager.enqueue(downloadRequest);
+        } else {  // The download is not an HTTP or HTTPS URI.
+            Snackbar.make(currentWebView, R.string.cannot_download_file, Snackbar.LENGTH_INDEFINITE).show();
+        }
+    }
 
-        // Display the new bookmark below the current items in the (0 indexed) list.
-        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+    // Override `onBackPressed` to handle the navigation drawer and and the WebView.
+    @Override
+    public void onBackPressed() {
+        // Get a handle for the drawer layout and the tab layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
 
-        // Create the bookmark.
-        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
+        if (drawerLayout.isDrawerVisible(GravityCompat.START)) {  // The navigation drawer is open.
+            // Close the navigation drawer.
+            drawerLayout.closeDrawer(GravityCompat.START);
+        } else if (drawerLayout.isDrawerVisible(GravityCompat.END)){  // The bookmarks drawer is open.
+            if (currentBookmarksFolder.isEmpty()) {  // The home folder is displayed.
+                // close the bookmarks drawer.
+                drawerLayout.closeDrawer(GravityCompat.END);
+            } else {  // A subfolder is displayed.
+                // Place the former parent folder in `currentFolder`.
+                currentBookmarksFolder = bookmarksDatabaseHelper.getParentFolderName(currentBookmarksFolder);
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+                // Load the new folder.
+                loadBookmarksFolder();
+            }
+        } else if (currentWebView.canGoBack()) {  // There is at least one item in the current WebView history.
+            // Reset the current domain name so that navigation works if third-party requests are blocked.
+            currentWebView.resetCurrentDomainName();
 
-        // Update the list view.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+            // Set navigating history so that the domain settings are applied when the new URL is loaded.
+            currentWebView.setNavigatingHistory(true);
 
-        // Scroll to the new bookmark.
-        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+            // Go back.
+            currentWebView.goBack();
+        } else if (tabLayout.getTabCount() > 1) {  // There are at least two tabs.
+            // Close the current tab.
+            closeCurrentTab();
+        } else {  // There isn't anything to do in Privacy Browser.
+            // Run the default commands.
+            super.onBackPressed();
+
+            // Manually kill Privacy Browser.  Otherwise, it is glitchy when restarted.
+            System.exit(0);
+        }
     }
 
+    // Process the results of an upload file chooser.  Currently there is only one `startActivityForResult` in this activity, so the request code, used to differentiate them, is ignored.
     @Override
-    public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
-        // Get a handle for the bookmarks list view.
-        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        // File uploads only work on API >= 21.
+        if (Build.VERSION.SDK_INT >= 21) {
+            // Pass the file to the WebView.
+            fileChooserCallback.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
+        }
+    }
 
-        // Get handles for the views in the dialog fragment.
-        EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
-        RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
-        ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
+    private void loadUrlFromTextBox() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-        // Get new folder name string.
-        String folderNameString = createFolderNameEditText.getText().toString();
+        // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
+        String unformattedUrlString = urlEditText.getText().toString().trim();
 
-        // Create a folder icon bitmap.
-        Bitmap folderIconBitmap;
+        // Initialize the formatted URL string.
+        String url = "";
 
-        // Set the folder icon bitmap according to the dialog.
-        if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
-            // Get the default folder icon drawable.
-            Drawable folderIconDrawable = folderIconImageView.getDrawable();
+        // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
+        if (unformattedUrlString.startsWith("content://")) {  // This is a Content URL.
+            // Load the entire content URL.
+            url = unformattedUrlString;
+        } else if (Patterns.WEB_URL.matcher(unformattedUrlString).matches() || unformattedUrlString.startsWith("http://") || unformattedUrlString.startsWith("https://") ||
+                unformattedUrlString.startsWith("file://")) {  // This is a standard URL.
+            // Add `https://` at the beginning if there is no protocol.  Otherwise the app will segfault.
+            if (!unformattedUrlString.startsWith("http") && !unformattedUrlString.startsWith("file://") && !unformattedUrlString.startsWith("content://")) {
+                unformattedUrlString = "https://" + unformattedUrlString;
+            }
 
-            // Convert the folder icon drawable to a bitmap drawable.
-            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+            // Initialize `unformattedUrl`.
+            URL unformattedUrl = null;
 
-            // Convert the folder icon bitmap drawable to a bitmap.
-            folderIconBitmap = folderIconBitmapDrawable.getBitmap();
-        } else {  // Use the WebView favorite icon.
-            // Copy the favorite icon bitmap to the folder icon bitmap.
-            folderIconBitmap = favoriteIconBitmap;
-        }
+            // Convert `unformattedUrlString` to a `URL`, then to a `URI`, and then back to a `String`, which sanitizes the input and adds in any missing components.
+            try {
+                unformattedUrl = new URL(unformattedUrlString);
+            } catch (MalformedURLException e) {
+                e.printStackTrace();
+            }
 
-        // Create a folder icon byte array output stream.
-        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
+            // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
+            String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
+            String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
+            String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
+            String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
+            String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
 
-        // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-        folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
+            // Build the URI.
+            Uri.Builder uri = new Uri.Builder();
+            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
 
-        // Convert the folder icon byte array stream to a byte array.
-        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+            // Decode the URI as a UTF-8 string in.
+            try {
+                url = URLDecoder.decode(uri.build().toString(), "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                // Do nothing.  The formatted URL string will remain blank.
+            }
+        } else if (!unformattedUrlString.isEmpty()){  // This is not a URL, but rather a search string.
+            // Create an encoded URL String.
+            String encodedUrlString;
 
-        // Move all the bookmarks down one in the display order.
-        for (int i = 0; i < bookmarksListView.getCount(); i++) {
-            int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
-            bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
+            // Sanitize the search input.
+            try {
+                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
+
+            // Add the base search URL.
+            url = searchURL + encodedUrlString;
         }
 
-        // Create the folder, which will be placed at the top of the `ListView`.
-        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
+        // Clear the focus from the URL edit text.  Otherwise, proximate typing in the box will retain the colorized formatting instead of being reset during refocus.
+        urlEditText.clearFocus();
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+        // Make it so.
+        loadUrl(url);
+    }
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    private void loadUrl(String url) {
+        // Sanitize the URL.
+        url = sanitizeUrl(url);
 
-        // Scroll to the new folder.
-        bookmarksListView.setSelection(0);
-    }
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, true, false);
 
-    @Override
-    public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
-        // Get handles for the views from `dialogFragment`.
-        EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
-        EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
-        RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
+        // Load the URL.
+        currentWebView.loadUrl(url, customHeaders);
+    }
 
-        // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+    public void findPreviousOnPage(View view) {
+        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
+        currentWebView.findNext(false);
+    }
 
-        // Update the bookmark.
-        if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
-        } else {  // Update the bookmark using the `WebView` favorite icon.
-            // Create a favorite icon byte array output stream.
-            ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+    public void findNextOnPage(View view) {
+        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
+        currentWebView.findNext(true);
+    }
 
-            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
+    public void closeFindOnPage(View view) {
+        // Get a handle for the views.
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
+        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
 
-            // Convert the favorite icon byte array stream to a byte array.
-            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
+        // Delete the contents of `find_on_page_edittext`.
+        findOnPageEditText.setText(null);
 
-            //  Update the bookmark and the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+        // Clear the highlighted phrases if the WebView is not null.
+        if (currentWebView != null) {
+            currentWebView.clearMatches();
         }
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+        // Hide the find on page linear layout.
+        findOnPageLinearLayout.setVisibility(View.GONE);
 
-        // Update the list view.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // Show the toolbar.
+        toolbar.setVisibility(View.VISIBLE);
 
-    @Override
-    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
-        // Get handles for the views from `dialogFragment`.
-        EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
-        RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
-        RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
-        ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
+        // Get a handle for the input method manager.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-        // Get the new folder name.
-        String newFolderNameString = editFolderNameEditText.getText().toString();
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-        // Check if the favorite icon has changed.
-        if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
-            // Update the name in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
-        } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
-            // Create the new folder icon Bitmap.
-            Bitmap folderIconBitmap;
+        // Hide the keyboard.
+        inputMethodManager.hideSoftInputFromWindow(toolbar.getWindowToken(), 0);
+    }
 
-            // Populate the new folder icon bitmap.
-            if (defaultFolderIconRadioButton.isChecked()) {
-                // Get the default folder icon drawable.
-                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
+    private void applyAppSettings() {
+        // Initialize the app if this is the first run.  This is done here instead of in `onCreate()` to shorten the time that an unthemed background is displayed on app startup.
+        if (webViewDefaultUserAgent == null) {
+            initializeApp();
+        }
 
-                // Convert the folder icon drawable to a bitmap drawable.
-                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                // Convert the folder icon bitmap drawable to a bitmap.
-                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
-            } else {  // Use the `WebView` favorite icon.
-                // Copy the favorite icon bitmap to the folder icon bitmap.
-                folderIconBitmap = favoriteIconBitmap;
-            }
+        // Store the values from the shared preferences in variables.
+        incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
+        boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
+        sanitizeGoogleAnalytics = sharedPreferences.getBoolean("google_analytics", true);
+        sanitizeFacebookClickIds = sharedPreferences.getBoolean("facebook_click_ids", true);
+        sanitizeTwitterAmpRedirects = sharedPreferences.getBoolean("twitter_amp_redirects", true);
+        proxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
+        fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
+        hideAppBar = sharedPreferences.getBoolean("hide_app_bar", true);
+        scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
 
-            // Create a folder icon byte array output stream.
-            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+        // Get handles for the views that need to be modified.
+        FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+        AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
+        ActionBar actionBar = getSupportActionBar();
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
+        LinearLayout tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
+        // Remove the incorrect lint warning below that the action bar might be null.
+        assert actionBar != null;
 
-            // Convert the folder icon byte array stream to a byte array.
-            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+        // Apply the proxy through Orbot settings.
+        applyProxyThroughOrbot(false);
 
-            // Update the folder icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, newFolderIconByteArray);
-        } else {  // The folder icon and the name have changed.
-            // Get the new folder icon `Bitmap`.
-            Bitmap folderIconBitmap;
-            if (defaultFolderIconRadioButton.isChecked()) {
-                // Get the default folder icon drawable.
-                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
+        // Set Do Not Track status.
+        if (doNotTrackEnabled) {
+            customHeaders.put("DNT", "1");
+        } else {
+            customHeaders.remove("DNT");
+        }
 
-                // Convert the folder icon drawable to a bitmap drawable.
-                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+        // Get the current layout parameters.  Using coordinator layout parameters allows the `setBehavior()` command and using app bar layout parameters allows the `setScrollFlags()` command.
+        CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
+        AppBarLayout.LayoutParams toolbarLayoutParams = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
+        AppBarLayout.LayoutParams findOnPageLayoutParams = (AppBarLayout.LayoutParams) findOnPageLinearLayout.getLayoutParams();
+        AppBarLayout.LayoutParams tabsLayoutParams = (AppBarLayout.LayoutParams) tabsLinearLayout.getLayoutParams();
+
+        // Add the scrolling behavior to the layout parameters.
+        if (scrollAppBar) {
+            // Enable scrolling of the app bar.
+            swipeRefreshLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
+            toolbarLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+            findOnPageLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+            tabsLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+        } else {
+            // Disable scrolling of the app bar.
+            swipeRefreshLayoutParams.setBehavior(null);
+            toolbarLayoutParams.setScrollFlags(0);
+            findOnPageLayoutParams.setScrollFlags(0);
+            tabsLayoutParams.setScrollFlags(0);
+
+            // Expand the app bar if it is currently collapsed.
+            appBarLayout.setExpanded(true);
+        }
 
-                // Convert the folder icon bitmap drawable to a bitmap.
-                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
-            } else {  // Use the `WebView` favorite icon.
-                // Copy the favorite icon bitmap to the folder icon bitmap.
-                folderIconBitmap = favoriteIconBitmap;
-            }
+        // Apply the modified layout parameters.
+        swipeRefreshLayout.setLayoutParams(swipeRefreshLayoutParams);
+        toolbar.setLayoutParams(toolbarLayoutParams);
+        findOnPageLinearLayout.setLayoutParams(findOnPageLayoutParams);
+        tabsLinearLayout.setLayoutParams(tabsLayoutParams);
 
-            // Create a folder icon byte array output stream.
-            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+        // Set the app bar scrolling for each WebView.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-            // Convert the folder icon byte array stream to a byte array.
-            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+            // Only modify the WebViews if they exist.
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-            // Update the folder name and icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+                // Set the app bar scrolling.
+                nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
+            }
         }
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+        // Update the full screen browsing mode settings.
+        if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+            // Update the visibility of the app bar, which might have changed in the settings.
+            if (hideAppBar) {
+                // Hide the tab linear layout.
+                tabsLinearLayout.setVisibility(View.GONE);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+                // Hide the action bar.
+                actionBar.hide();
+            } else {
+                // Show the tab linear layout.
+                tabsLinearLayout.setVisibility(View.VISIBLE);
 
-    @Override
-    public void onCloseDownloadLocationPermissionDialog(int downloadType) {
-        switch (downloadType) {
-            case DownloadLocationPermissionDialog.DOWNLOAD_FILE:
-                // Request the WRITE_EXTERNAL_STORAGE permission with a file request code.
-                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
-                break;
+                // Show the action bar.
+                actionBar.show();
+            }
 
-            case DownloadLocationPermissionDialog.DOWNLOAD_IMAGE:
-                // Request the WRITE_EXTERNAL_STORAGE permission with an image request code.
-                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
-                break;
-        }
-    }
+            // Hide the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                AdHelper.hideAd(findViewById(R.id.adview));
+            }
 
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-        // Get a handle for the fragment manager.
-        FragmentManager fragmentManager = getSupportFragmentManager();
+            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-        switch (requestCode) {
-            case DOWNLOAD_FILE_REQUEST_CODE:
-                // Show the download file alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
-                DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, downloadContentDisposition, downloadContentLength);
+            /* Hide the system bars.
+             * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+             * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+             */
+            rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        } else {  // Privacy Browser is not in full screen browsing mode.
+            // Reset the full screen tracker, which could be true if Privacy Browser was in full screen mode before entering settings and full screen browsing was disabled.
+            inFullScreenBrowsingMode = false;
 
-                // On API 23, displaying the fragment must be delayed or the app will crash.
-                if (Build.VERSION.SDK_INT == 23) {
-                    new Handler().postDelayed(() -> downloadFileDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
-                } else {
-                    downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
-                }
+            // Show the tab linear layout.
+            tabsLinearLayout.setVisibility(View.VISIBLE);
 
-                // Reset the download variables.
-                downloadUrl = "";
-                downloadContentDisposition = "";
-                downloadContentLength = 0;
-                break;
+            // Show the action bar.
+            actionBar.show();
 
-            case DOWNLOAD_IMAGE_REQUEST_CODE:
-                // Show the download image alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
-                DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(downloadImageUrl);
+            // Show the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                // Initialize the ads.  If this isn't the first run, `loadAd()` will be automatically called instead.
+                AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getSupportFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
+            }
 
-                // On API 23, displaying the fragment must be delayed or the app will crash.
-                if (Build.VERSION.SDK_INT == 23) {
-                    new Handler().postDelayed(() -> downloadImageDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
-                } else {
-                    downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
-                }
+            // Remove the `SYSTEM_UI` flags from the root frame layout.
+            rootFrameLayout.setSystemUiVisibility(0);
 
-                // Reset the image URL variable.
-                downloadImageUrl = "";
-                break;
+            // Add the translucent status flag.
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
         }
     }
 
-    @Override
-    public void onDownloadImage(DialogFragment dialogFragment, String imageUrl) {
-        // Download the image if it has an HTTP or HTTPS URI.
-        if (imageUrl.startsWith("http")) {
-            // Get a handle for the system `DOWNLOAD_SERVICE`.
-            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
+    private void initializeApp() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            // Parse `imageUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
+        // Get the theme preference.
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-            // Get a handle for the cookie manager.
-            CookieManager cookieManager = CookieManager.getInstance();
+        // Get a handle for the input method.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-            // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
-            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
-            if (cookieManager.acceptCookie()) {
-                // Get the cookies for `imageUrl`.
-                String cookies = cookieManager.getCookie(imageUrl);
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
+        // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
+        redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
+        initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
+        finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
+
+        // Get handles for the URL views.
+        EditText urlEditText = findViewById(R.id.url_edittext);
+
+        // Remove the formatting from the URL edit text when the user is editing the text.
+        urlEditText.setOnFocusChangeListener((View v, boolean hasFocus) -> {
+            if (hasFocus) {  // The user is editing the URL text box.
+                // Remove the highlighting.
+                urlEditText.getText().removeSpan(redColorSpan);
+                urlEditText.getText().removeSpan(initialGrayColorSpan);
+                urlEditText.getText().removeSpan(finalGrayColorSpan);
+            } else {  // The user has stopped editing the URL text box.
+                // Move to the beginning of the string.
+                urlEditText.setSelection(0);
+
+                // Reapply the highlighting.
+                highlightUrlText();
             }
+        });
 
-            // Get the file name from the dialog fragment.
-            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
-            String imageName = downloadImageNameEditText.getText().toString();
+        // Set the go button on the keyboard to load the URL in `urlTextBox`.
+        urlEditText.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
+            // If the event is a key-down event on the `enter` button, load the URL.
+            if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
+                // Load the URL into the mainWebView and consume the event.
+                loadUrlFromTextBox();
 
-            // Specify the download location.
-            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
-                // Download to the public download directory.
-                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, imageName);
-            } else {  // External write permission denied.
-                // Download to the app's external download directory.
-                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, imageName);
+                // If the enter key was pressed, consume the event.
+                return true;
+            } else {
+                // If any other key was pressed, do not consume the event.
+                return false;
             }
+        });
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+        // Initialize the Orbot status and the waiting for Orbot trackers.
+        orbotStatus = "unknown";
+        waitingForOrbot = false;
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(imageUrl);
+        // Create an Orbot status `BroadcastReceiver`.
+        orbotStatusBroadcastReceiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                // Store the content of the status message in `orbotStatus`.
+                orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+                // If Privacy Browser is waiting on Orbot, load the website now that Orbot is connected.
+                if (orbotStatus.equals("ON") && waitingForOrbot) {
+                    // Reset the waiting for Orbot status.
+                    waitingForOrbot = false;
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+                    // Get the intent that started the app.
+                    Intent launchingIntent = getIntent();
 
-            // Initiate the download.
-            downloadManager.enqueue(downloadRequest);
-        } else {  // The image is not an HTTP or HTTPS URI.
-            Snackbar.make(currentWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
-        }
-    }
+                    // Get the information from the intent.
+                    String launchingIntentAction = launchingIntent.getAction();
+                    Uri launchingIntentUriData = launchingIntent.getData();
+
+                    // If the intent action is a web search, perform the search.
+                    if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
+                        // Create an encoded URL string.
+                        String encodedUrlString;
+
+                        // Sanitize the search input and convert it to a search.
+                        try {
+                            encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                        } catch (UnsupportedEncodingException exception) {
+                            encodedUrlString = "";
+                        }
+
+                        // Load the completed search URL.
+                        loadUrl(searchURL + encodedUrlString);
+                    } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
+                        // Load the URL from the intent.
+                        loadUrl(launchingIntentUriData.toString());
+                    } else {  // The is no URL in the intent.
+                        // Select the homepage based on the proxy through Orbot status.
+                        if (proxyThroughOrbot) {
+                            // Load the Tor homepage.
+                            loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
+                        } else {
+                            // Load the normal homepage.
+                            loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+                        }
+                    }
+                }
+            }
+        };
 
-    @Override
-    public void onDownloadFile(DialogFragment dialogFragment, String downloadUrl) {
-        // Download the file if it has an HTTP or HTTPS URI.
-        if (downloadUrl.startsWith("http")) {
-            // Get a handle for the system `DOWNLOAD_SERVICE`.
-            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
+        // Register `orbotStatusBroadcastReceiver` on `this` context.
+        this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
 
-            // Parse `downloadUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
+        // Get handles for views that need to be modified.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        NavigationView navigationView = findViewById(R.id.navigationview);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+        ViewPager webViewPager = findViewById(R.id.webviewpager);
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+        FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
+        FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
+        FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
+        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
 
-            // Get a handle for the cookie manager.
-            CookieManager cookieManager = CookieManager.getInstance();
+        // Listen for touches on the navigation menu.
+        navigationView.setNavigationItemSelectedListener(this);
 
-            // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
-            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
-            if (cookieManager.acceptCookie()) {
-                // Get the cookies for `downloadUrl`.
-                String cookies = cookieManager.getCookie(downloadUrl);
+        // Get handles for the navigation menu and the back and forward menu items.  The menu is zero-based.
+        Menu navigationMenu = navigationView.getMenu();
+        MenuItem navigationBackMenuItem = navigationMenu.getItem(2);
+        MenuItem navigationForwardMenuItem = navigationMenu.getItem(3);
+        MenuItem navigationHistoryMenuItem = navigationMenu.getItem(4);
+        MenuItem navigationRequestsMenuItem = navigationMenu.getItem(5);
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
+        // Update the web view pager every time a tab is modified.
+        webViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+            @Override
+            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+                // Do nothing.
             }
 
-            // Get the file name from the dialog fragment.
-            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
-            String fileName = downloadFileNameEditText.getText().toString();
+            @Override
+            public void onPageSelected(int position) {
+                // Close the find on page bar if it is open.
+                closeFindOnPage(null);
 
-            // Specify the download location.
-            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
-                // Download to the public download directory.
-                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
-            } else {  // External write permission denied.
-                // Download to the app's external download directory.
-                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, fileName);
-            }
+                // Set the current WebView.
+                setCurrentWebView(position);
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+                // Select the corresponding tab if it does not match the currently selected page.  This will happen if the page was scrolled via swiping in the view pager or by creating a new tab.
+                if (tabLayout.getSelectedTabPosition() != position) {
+                    // Create a handler to select the tab.
+                    Handler selectTabHandler = new Handler();
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(downloadUrl);
+                    // Create a runnable to select the tab.
+                    Runnable selectTabRunnable = () -> {
+                        // Get a handle for the tab.
+                        TabLayout.Tab tab = tabLayout.getTabAt(position);
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+                        // Assert that the tab is not null.
+                        assert tab != null;
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+                        // Select the tab.
+                        tab.select();
+                    };
 
-            // Initiate the download.
-            downloadManager.enqueue(downloadRequest);
-        } else {  // The download is not an HTTP or HTTPS URI.
-            Snackbar.make(currentWebView, R.string.cannot_download_file, Snackbar.LENGTH_INDEFINITE).show();
-        }
-    }
+                    // Select the tab layout after 150 milliseconds, which leaves enough time for a new tab to be inflated.
+                    selectTabHandler.postDelayed(selectTabRunnable, 150);
+                }
+            }
 
-    // Override `onBackPressed` to handle the navigation drawer and and the WebView.
-    @Override
-    public void onBackPressed() {
-        // Get a handle for the drawer layout.
-        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+            @Override
+            public void onPageScrollStateChanged(int state) {
+                // Do nothing.
+            }
+        });
 
-        if (drawerLayout.isDrawerVisible(GravityCompat.START)) {  // The navigation drawer is open.
-            // Close the navigation drawer.
-            drawerLayout.closeDrawer(GravityCompat.START);
-        } else if (drawerLayout.isDrawerVisible(GravityCompat.END)){  // The bookmarks drawer is open.
-            if (currentBookmarksFolder.isEmpty()) {  // The home folder is displayed.
-                // close the bookmarks drawer.
-                drawerLayout.closeDrawer(GravityCompat.END);
-            } else {  // A subfolder is displayed.
-                // Place the former parent folder in `currentFolder`.
-                currentBookmarksFolder = bookmarksDatabaseHelper.getParentFolderName(currentBookmarksFolder);
+        // Display the View SSL Certificate dialog when the currently selected tab is reselected.
+        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
+            @Override
+            public void onTabSelected(TabLayout.Tab tab) {
+                // Select the same page in the view pager.
+                webViewPager.setCurrentItem(tab.getPosition());
+            }
 
-                // Load the new folder.
-                loadBookmarksFolder();
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+                // Do nothing.
             }
-        } else if (currentWebView.canGoBack()) {  // There is at least one item in the current WebView history.
-            // Reset the current domain name so that navigation works if third-party requests are blocked.
-            currentWebView.resetCurrentDomainName();
 
-            // Set navigating history so that the domain settings are applied when the new URL is loaded.
-            currentWebView.setNavigatingHistory(true);
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {
+                // Instantiate the View SSL Certificate dialog.
+                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId());
 
-            // Go back.
-            currentWebView.goBack();
-        } else {  // There is nothing else to do.
-            // Load a blank website.
-            loadUrl("");
-        }
-    }
+                // Display the View SSL Certificate dialog.
+                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
+            }
+        });
 
-    // Process the results of an upload file chooser.  Currently there is only one `startActivityForResult` in this activity, so the request code, used to differentiate them, is ignored.
-    @Override
-    public void onActivityResult(int requestCode, int resultCode, Intent data) {
-        // File uploads only work on API >= 21.
-        if (Build.VERSION.SDK_INT >= 21) {
-            // Pass the file to the WebView.
-            fileChooserCallback.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
+        // Set the bookmarks drawer resources according to the theme.  This can't be done in the layout due to compatibility issues with the `DrawerLayout` support widget.
+        // The deprecated `getResources().getDrawable()` must be used until the minimum API >= 21 and and `getResources().getColor()` must be used until the minimum API >= 23.
+        if (darkTheme) {
+            launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
+            createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
+            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_dark));
+            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.gray_850));
+        } else {
+            launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_light));
+            createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_light));
+            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_light));
+            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.white));
         }
-    }
 
-    private void loadUrlFromTextBox() {
-        // Get a handle for the URL edit text.
-        EditText urlEditText = findViewById(R.id.url_edittext);
+        // Set the launch bookmarks activity FAB to launch the bookmarks activity.
+        launchBookmarksActivityFab.setOnClickListener(v -> {
+            // Get a copy of the favorite icon bitmap.
+            Bitmap favoriteIconBitmap = currentWebView.getFavoriteOrDefaultIcon();
 
-        // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
-        String unformattedUrlString = urlEditText.getText().toString().trim();
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-        // Initialize the formatted URL string.
-        String url = "";
+            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 
-        // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
-        if (unformattedUrlString.startsWith("content://")) {  // This is a Content URL.
-            // Load the entire content URL.
-            url = unformattedUrlString;
-        } else if (Patterns.WEB_URL.matcher(unformattedUrlString).matches() || unformattedUrlString.startsWith("http://") || unformattedUrlString.startsWith("https://") ||
-                unformattedUrlString.startsWith("file://")) {  // This is a standard URL.
-            // Add `https://` at the beginning if there is no protocol.  Otherwise the app will segfault.
-            if (!unformattedUrlString.startsWith("http") && !unformattedUrlString.startsWith("file://") && !unformattedUrlString.startsWith("content://")) {
-                unformattedUrlString = "https://" + unformattedUrlString;
-            }
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-            // Initialize `unformattedUrl`.
-            URL unformattedUrl = null;
+            // Create an intent to launch the bookmarks activity.
+            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
 
-            // Convert `unformattedUrlString` to a `URL`, then to a `URI`, and then back to a `String`, which sanitizes the input and adds in any missing components.
-            try {
-                unformattedUrl = new URL(unformattedUrlString);
-            } catch (MalformedURLException e) {
-                e.printStackTrace();
-            }
+            // Add the extra information to the intent.
+            bookmarksIntent.putExtra("current_url", currentWebView.getUrl());
+            bookmarksIntent.putExtra("current_title", currentWebView.getTitle());
+            bookmarksIntent.putExtra("current_folder", currentBookmarksFolder);
+            bookmarksIntent.putExtra("favorite_icon_byte_array", favoriteIconByteArray);
 
-            // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
-            String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
-            String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
-            String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
-            String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
-            String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
+            // Make it so.
+            startActivity(bookmarksIntent);
+        });
 
-            // Build the URI.
-            Uri.Builder uri = new Uri.Builder();
-            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+        // Set the create new bookmark folder FAB to display an alert dialog.
+        createBookmarkFolderFab.setOnClickListener(v -> {
+            // Create a create bookmark folder dialog.
+            DialogFragment createBookmarkFolderDialog = CreateBookmarkFolderDialog.createBookmarkFolder(currentWebView.getFavoriteOrDefaultIcon());
 
-            // Decode the URI as a UTF-8 string in.
-            try {
-                url = URLDecoder.decode(uri.build().toString(), "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                // Do nothing.  The formatted URL string will remain blank.
-            }
-        } else if (!unformattedUrlString.isEmpty()){  // This is not a URL, but rather a search string.
-            // Create an encoded URL String.
-            String encodedUrlString;
+            // Show the create bookmark folder dialog.
+            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
+        });
 
-            // Sanitize the search input.
-            try {
-                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
+        // Set the create new bookmark FAB to display an alert dialog.
+        createBookmarkFab.setOnClickListener(view -> {
+            // Instantiate the create bookmark dialog.
+            DialogFragment createBookmarkDialog = CreateBookmarkDialog.createBookmark(currentWebView.getUrl(), currentWebView.getTitle(), currentWebView.getFavoriteOrDefaultIcon());
+
+            // Display the create bookmark dialog.
+            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
+        });
+
+        // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
+        findOnPageEditText.addTextChangedListener(new TextWatcher() {
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+                // Do nothing.
             }
 
-            // Add the base search URL.
-            url = searchURL + encodedUrlString;
-        }
-
-        // Clear the focus from the URL edit text.  Otherwise, proximate typing in the box will retain the colorized formatting instead of being reset during refocus.
-        urlEditText.clearFocus();
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                // Do nothing.
+            }
 
-        // Make it so.
-        loadUrl(url);
-    }
+            @Override
+            public void afterTextChanged(Editable s) {
+                // Search for the text in the WebView if it is not null.  Sometimes on resume after a period of non-use the WebView will be null.
+                if (currentWebView != null) {
+                    currentWebView.findAllAsync(findOnPageEditText.getText().toString());
+                }
+            }
+        });
 
-    private void loadUrl(String url) {
-        // Apply the domain settings.
-        applyDomainSettings(currentWebView, url, true, false);
+        // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
+        findOnPageEditText.setOnKeyListener((v, keyCode, event) -> {
+            if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
+                // Hide the soft keyboard.
+                inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
 
-        // Load the URL.
-        currentWebView.loadUrl(url, customHeaders);
-    }
+                // Consume the event.
+                return true;
+            } else {  // A different key was pressed.
+                // Do not consume the event.
+                return false;
+            }
+        });
 
-    public void findPreviousOnPage(View view) {
-        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
-        currentWebView.findNext(false);
-    }
+        // Implement swipe to refresh.
+        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
 
-    public void findNextOnPage(View view) {
-        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
-        currentWebView.findNext(true);
-    }
+        // Store the default progress view offsets for use later in `initializeWebView()`.
+        defaultProgressViewStartOffset = swipeRefreshLayout.getProgressViewStartOffset();
+        defaultProgressViewEndOffset = swipeRefreshLayout.getProgressViewEndOffset();
 
-    public void closeFindOnPage(View view) {
-        // Get a handle for the views.
-        Toolbar toolbar = findViewById(R.id.toolbar);
-        LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
-        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
+        // Set the swipe to refresh color according to the theme.
+        if (darkTheme) {
+            swipeRefreshLayout.setColorSchemeResources(R.color.blue_800);
+            swipeRefreshLayout.setProgressBackgroundColorSchemeResource(R.color.gray_850);
+        } else {
+            swipeRefreshLayout.setColorSchemeResources(R.color.blue_500);
+        }
 
-        // Delete the contents of `find_on_page_edittext`.
-        findOnPageEditText.setText(null);
+        // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
+        drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
+        drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
 
-        // Clear the highlighted phrases.
-        currentWebView.clearMatches();
+        // Initialize the bookmarks database helper.  The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
+        bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
 
-        // Hide the find on page linear layout.
-        findOnPageLinearLayout.setVisibility(View.GONE);
+        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
+        currentBookmarksFolder = "";
 
-        // Show the toolbar.
-        toolbar.setVisibility(View.VISIBLE);
+        // Load the home folder, which is `""` in the database.
+        loadBookmarksFolder();
 
-        // Get a handle for the input method manager.
-        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+        bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
+            // Convert the id from long to int to match the format of the bookmarks database.
+            int databaseID = (int) id;
 
-        // Remove the lint warning below that the input method manager might be null.
-        assert inputMethodManager != null;
+            // Get the bookmark cursor for this ID and move it to the first row.
+            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
+            bookmarkCursor.moveToFirst();
 
-        // Hide the keyboard.
-        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
-    }
+            // Act upon the bookmark according to the type.
+            if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
+                // Store the new folder name in `currentBookmarksFolder`.
+                currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
-    private void applyAppSettings() {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Load the new folder.
+                loadBookmarksFolder();
+            } else {  // The selected bookmark is not a folder.
+                // Load the bookmark URL.
+                loadUrl(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
 
-        // Store the values from the shared preferences in variables.
-        incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
-        boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
-        proxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
-        fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
-        hideAppBar = sharedPreferences.getBoolean("hide_app_bar", true);
+                // Close the bookmarks drawer.
+                drawerLayout.closeDrawer(GravityCompat.END);
+            }
 
-        // Get handles for the views that need to be modified.
-        FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
-        ActionBar actionBar = getSupportActionBar();
-        LinearLayout tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
+            // Close the `Cursor`.
+            bookmarkCursor.close();
+        });
 
-        // Remove the incorrect lint warning below that the action bar might be null.
-        assert actionBar != null;
+        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
+            // Convert the database ID from `long` to `int`.
+            int databaseId = (int) id;
 
-        // Apply the proxy through Orbot settings.
-        applyProxyThroughOrbot(false);
+            // Find out if the selected bookmark is a folder.
+            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
+            if (isFolder) {
+                // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
+                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
-        // Set the app bar scrolling for each WebView.
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+                // Show the edit bookmark folder `AlertDialog` and name the instance `@string/edit_folder`.
+                DialogFragment editBookmarkFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
+                editBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.edit_folder));
+            } else {
+                // Show the edit bookmark `AlertDialog` and name the instance `@string/edit_bookmark`.
+                DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
+                editBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.edit_bookmark));
+            }
 
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
+            // Consume the event.
+            return true;
+        });
 
-            // Only modify the WebViews if they exist.
-            if (fragmentView != null) {
-                // Get the nested scroll WebView from the tab fragment.
-                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-                // Set the app bar scrolling.
-                nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
-            }
-        }
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-        // Update the full screen browsing mode settings.
-        if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
-            // Update the visibility of the app bar, which might have changed in the settings.
-            if (hideAppBar) {
-                // Hide the tab linear layout.
-                tabsLinearLayout.setVisibility(View.GONE);
+        // Calculate the drawer header padding.  This is used to move the text in the drawer headers below any cutouts.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
 
-                // Hide the action bar.
-                actionBar.hide();
-            } else {
-                // Show the tab linear layout.
-                tabsLinearLayout.setVisibility(View.VISIBLE);
+        // The drawer listener is used to update the navigation menu.`
+        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
+            @Override
+            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
+            }
 
-                // Show the action bar.
-                actionBar.show();
+            @Override
+            public void onDrawerOpened(@NonNull View drawerView) {
             }
 
-            // Hide the banner ad in the free flavor.
-            if (BuildConfig.FLAVOR.contentEquals("free")) {
-                AdHelper.hideAd(findViewById(R.id.adview));
+            @Override
+            public void onDrawerClosed(@NonNull View drawerView) {
             }
 
-            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            @Override
+            public void onDrawerStateChanged(int newState) {
+                if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
+                    // Get handles for the drawer headers.
+                    TextView navigationHeaderTextView = findViewById(R.id.navigationText);
+                    TextView bookmarksHeaderTextView = findViewById(R.id.bookmarks_title_textview);
 
-            /* Hide the system bars.
-             * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
-             * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
-             * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
-             * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
-             */
-            rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
-                    View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
-        } else {  // Privacy Browser is not in full screen browsing mode.
-            // Reset the full screen tracker, which could be true if Privacy Browser was in full screen mode before entering settings and full screen browsing was disabled.
-            inFullScreenBrowsingMode = false;
+                    // Apply the navigation header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
+                    if (navigationHeaderTextView != null) {
+                        navigationHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
+                    }
 
-            // Show the tab linear layout.
-            tabsLinearLayout.setVisibility(View.VISIBLE);
+                    // Apply the bookmarks header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
+                    if (bookmarksHeaderTextView != null) {
+                        bookmarksHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
+                    }
 
-            // Show the action bar.
-            actionBar.show();
+                    // Update the navigation menu items if the WebView is not null.
+                    if (currentWebView != null) {
+                        navigationBackMenuItem.setEnabled(currentWebView.canGoBack());
+                        navigationForwardMenuItem.setEnabled(currentWebView.canGoForward());
+                        navigationHistoryMenuItem.setEnabled((currentWebView.canGoBack() || currentWebView.canGoForward()));
+                        navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
 
-            // Show the banner ad in the free flavor.
-            if (BuildConfig.FLAVOR.contentEquals("free")) {
-                // Initialize the ads.  If this isn't the first run, `loadAd()` will be automatically called instead.
-                AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getSupportFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
+                        // Hide the keyboard (if displayed).
+                        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+                    }
+
+                    // Clear the focus from from the URL text box and the WebView.  This removes any text selection markers and context menus, which otherwise draw above the open drawers.
+                    urlEditText.clearFocus();
+                    currentWebView.clearFocus();
+                }
             }
+        });
 
-            // Remove the `SYSTEM_UI` flags from the root frame layout.
-            rootFrameLayout.setSystemUiVisibility(0);
+        // Replace the header that `WebView` creates for `X-Requested-With` with a null value.  The default value is the application ID (com.stoutner.privacybrowser.standard).
+        customHeaders.put("X-Requested-With", "");
 
-            // Add the translucent status flag.
-            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-        }
-    }
+        // Inflate a bare WebView to get the default user agent.  It is not used to render content on the screen.
+        @SuppressLint("InflateParams") View webViewLayout = getLayoutInflater().inflate(R.layout.bare_webview, null, false);
+
+        // Get a handle for the WebView.
+        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
+
+        // Store the default user agent.
+        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
 
+        // Destroy the bare WebView.
+        bareWebView.destroy();
+    }
 
     // `reloadWebsite` is used if returning from the Domains activity.  Otherwise JavaScript might not function correctly if it is newly enabled.
     @SuppressLint("SetJavaScriptEnabled")
@@ -3396,8 +3226,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             newHostName = "";
         }
 
-        // Only apply the domain settings if a new domain is being loaded.  This allows the user to set temporary settings for JavaScript, cookies, DOM storage, etc.
-        if (!nestedScrollWebView.getCurrentDomainName().equals(newHostName)) {
+        // Apply the domain settings if a new domain is being loaded or if the new domain is blank.  This allows the user to set temporary settings for JavaScript, cookies, DOM storage, etc.
+        if (!nestedScrollWebView.getCurrentDomainName().equals(newHostName) || newHostName.equals("")) {
             // Set the new host name as the current domain name.
             nestedScrollWebView.setCurrentDomainName(newHostName);
 
@@ -3422,24 +3252,24 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Get the corresponding tab.
                 TabLayout.Tab tab = tabLayout.getTabAt(currentPagePosition);
 
-                // Remove the warning below that the tab might be null.
-                assert tab != null;
-
-                // Get the tab custom view.
-                View tabCustomView = tab.getCustomView();
+                // Update the tab if it isn't null, which sometimes happens when restarting from the background.
+                if (tab != null) {
+                    // Get the tab custom view.
+                    View tabCustomView = tab.getCustomView();
 
-                // Remove the warning below that the tab custom view might be null.
-                assert tabCustomView != null;
+                    // Remove the warning below that the tab custom view might be null.
+                    assert tabCustomView != null;
 
-                // Get the tab views.
-                ImageView tabFavoriteIconImageView = tabCustomView.findViewById(R.id.favorite_icon_imageview);
-                TextView tabTitleTextView = tabCustomView.findViewById(R.id.title_textview);
+                    // Get the tab views.
+                    ImageView tabFavoriteIconImageView = tabCustomView.findViewById(R.id.favorite_icon_imageview);
+                    TextView tabTitleTextView = tabCustomView.findViewById(R.id.title_textview);
 
-                // Set the default favorite icon as the favorite icon for this tab.
-                tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(nestedScrollWebView.getFavoriteOrDefaultIcon(), 64, 64, true));
+                    // Set the default favorite icon as the favorite icon for this tab.
+                    tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(nestedScrollWebView.getFavoriteOrDefaultIcon(), 64, 64, true));
 
-                // Set the loading title text.
-                tabTitleTextView.setText(R.string.loading);
+                    // Set the loading title text.
+                    tabTitleTextView.setText(R.string.loading);
+                }
             }
 
             // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
@@ -3503,8 +3333,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             String defaultFontSizeString = sharedPreferences.getString("font_size", getString(R.string.font_size_default_value));
             String defaultUserAgentName = sharedPreferences.getString("user_agent", getString(R.string.user_agent_default_value));
             boolean defaultSwipeToRefresh = sharedPreferences.getBoolean("swipe_to_refresh", true);
-            boolean displayWebpageImages = sharedPreferences.getBoolean("display_webpage_images", true);
             boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
+            boolean wideViewport = sharedPreferences.getBoolean("wide_viewport", true);
+            boolean displayWebpageImages = sharedPreferences.getBoolean("display_webpage_images", true);
 
             // Get a handle for the cookie manager.
             CookieManager cookieManager = CookieManager.getInstance();
@@ -3546,6 +3377,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 int fontSize = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
                 int swipeToRefreshInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SWIPE_TO_REFRESH));
                 int nightModeInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.NIGHT_MODE));
+                int wideViewportInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.WIDE_VIEWPORT));
                 int displayWebpageImagesInt = currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
                 boolean pinnedSslCertificate = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.PINNED_SSL_CERTIFICATE)) == 1);
                 String pinnedSslIssuedToCName = currentDomainSettingsCursor.getString(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.SSL_ISSUED_TO_COMMON_NAME));
@@ -3588,17 +3420,17 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Set night mode according to the night mode int.
                 switch (nightModeInt) {
-                    case DomainsDatabaseHelper.NIGHT_MODE_SYSTEM_DEFAULT:
+                    case DomainsDatabaseHelper.SYSTEM_DEFAULT:
                         // Set night mode according to the current default.
                         nestedScrollWebView.setNightMode(sharedPreferences.getBoolean("night_mode", false));
                         break;
 
-                    case DomainsDatabaseHelper.NIGHT_MODE_ENABLED:
+                    case DomainsDatabaseHelper.ENABLED:
                         // Enable night mode.
                         nestedScrollWebView.setNightMode(true);
                         break;
 
-                    case DomainsDatabaseHelper.NIGHT_MODE_DISABLED:
+                    case DomainsDatabaseHelper.DISABLED:
                         // Disable night mode.
                         nestedScrollWebView.setNightMode(false);
                         break;
@@ -3636,59 +3468,55 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     nestedScrollWebView.getSettings().setTextZoom(fontSize);
                 }
 
-                // Only set the user agent if the webpage is not currently loading.  Otherwise, changing the user agent on redirects can cause the original website to reload.
-                // <https://redmine.stoutner.com/issues/160>
-                if (nestedScrollWebView.getProgress() == 100) {  // A URL is not loading.
-                    // Set the user agent.
-                    if (userAgentName.equals(getString(R.string.system_default_user_agent))) {  // Use the system default user agent.
-                        // Get the array position of the default user agent name.
-                        int defaultUserAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
-
-                        // Set the user agent according to the system default.
-                        switch (defaultUserAgentArrayPosition) {
-                            case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
-                                // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
-                                nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
-                                break;
-
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                nestedScrollWebView.getSettings().setUserAgentString("");
-                                break;
-
-                            case SETTINGS_CUSTOM_USER_AGENT:
-                                // Set the default custom user agent.
-                                nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
-                                break;
-
-                            default:
-                                // Get the user agent string from the user agent data array
-                                nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[defaultUserAgentArrayPosition]);
-                        }
-                    } else {  // Set the user agent according to the stored name.
-                        // Get the array position of the user agent name.
-                        int userAgentArrayPosition = userAgentNamesArray.getPosition(userAgentName);
-
-                        switch (userAgentArrayPosition) {
-                            case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
-                                nestedScrollWebView.getSettings().setUserAgentString(userAgentName);
-                                break;
-
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                nestedScrollWebView.getSettings().setUserAgentString("");
-                                break;
-
-                            default:
-                                // Get the user agent string from the user agent data array.
-                                nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
-                        }
+                // Set the user agent.
+                if (userAgentName.equals(getString(R.string.system_default_user_agent))) {  // Use the system default user agent.
+                    // Get the array position of the default user agent name.
+                    int defaultUserAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
+
+                    // Set the user agent according to the system default.
+                    switch (defaultUserAgentArrayPosition) {
+                        case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
+                            // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
+                            nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
+                            break;
+
+                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Set the user agent to `""`, which uses the default value.
+                            nestedScrollWebView.getSettings().setUserAgentString("");
+                            break;
+
+                        case SETTINGS_CUSTOM_USER_AGENT:
+                            // Set the default custom user agent.
+                            nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+                            break;
+
+                        default:
+                            // Get the user agent string from the user agent data array
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[defaultUserAgentArrayPosition]);
+                    }
+                } else {  // Set the user agent according to the stored name.
+                    // Get the array position of the user agent name.
+                    int userAgentArrayPosition = userAgentNamesArray.getPosition(userAgentName);
+
+                    switch (userAgentArrayPosition) {
+                        case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentName);
+                            break;
+
+                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Set the user agent to `""`, which uses the default value.
+                            nestedScrollWebView.getSettings().setUserAgentString("");
+                            break;
+
+                        default:
+                            // Get the user agent string from the user agent data array.
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
                     }
                 }
 
                 // Set swipe to refresh.
                 switch (swipeToRefreshInt) {
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_SYSTEM_DEFAULT:
+                    case DomainsDatabaseHelper.SYSTEM_DEFAULT:
                         // Store the swipe to refresh status in the nested scroll WebView.
                         nestedScrollWebView.setSwipeToRefresh(defaultSwipeToRefresh);
 
@@ -3696,7 +3524,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         swipeRefreshLayout.setEnabled(defaultSwipeToRefresh);
                         break;
 
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_ENABLED:
+                    case DomainsDatabaseHelper.ENABLED:
                         // Store the swipe to refresh status in the nested scroll WebView.
                         nestedScrollWebView.setSwipeToRefresh(true);
 
@@ -3704,7 +3532,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         swipeRefreshLayout.setEnabled(true);
                         break;
 
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_DISABLED:
+                    case DomainsDatabaseHelper.DISABLED:
                         // Store the swipe to refresh status in the nested scroll WebView.
                         nestedScrollWebView.setSwipeToRefresh(false);
 
@@ -3712,17 +3540,32 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         swipeRefreshLayout.setEnabled(false);
                 }
 
+                // Set the viewport.
+                switch (wideViewportInt) {
+                    case DomainsDatabaseHelper.SYSTEM_DEFAULT:
+                        nestedScrollWebView.getSettings().setUseWideViewPort(wideViewport);
+                        break;
+
+                    case DomainsDatabaseHelper.ENABLED:
+                        nestedScrollWebView.getSettings().setUseWideViewPort(true);
+                        break;
+
+                    case DomainsDatabaseHelper.DISABLED:
+                        nestedScrollWebView.getSettings().setUseWideViewPort(false);
+                        break;
+                }
+
                 // Set the loading of webpage images.
                 switch (displayWebpageImagesInt) {
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
+                    case DomainsDatabaseHelper.SYSTEM_DEFAULT:
                         nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
                         break;
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
+                    case DomainsDatabaseHelper.ENABLED:
                         nestedScrollWebView.getSettings().setLoadsImagesAutomatically(true);
                         break;
 
-                    case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
+                    case DomainsDatabaseHelper.DISABLED:
                         nestedScrollWebView.getSettings().setLoadsImagesAutomatically(false);
                         break;
                 }
@@ -3780,35 +3623,34 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     cookieManager.setAcceptThirdPartyCookies(nestedScrollWebView, defaultThirdPartyCookiesEnabled);
                 }
 
-                // Only set the user agent if the webpage is not currently loading.  Otherwise, changing the user agent on redirects can cause the original website to reload.
-                // <https://redmine.stoutner.com/issues/160>
-                if (nestedScrollWebView.getProgress() == 100) {  // A URL is not loading.
-                    // Get the array position of the user agent name.
-                    int userAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
+                // Get the array position of the user agent name.
+                int userAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
 
-                    // Set the user agent.
-                    switch (userAgentArrayPosition) {
-                        case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
-                            // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
-                            nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
-                            break;
+                // Set the user agent.
+                switch (userAgentArrayPosition) {
+                    case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
+                        // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
+                        nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
+                        break;
 
-                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                            // Set the user agent to `""`, which uses the default value.
-                            nestedScrollWebView.getSettings().setUserAgentString("");
-                            break;
+                    case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                        // Set the user agent to `""`, which uses the default value.
+                        nestedScrollWebView.getSettings().setUserAgentString("");
+                        break;
 
-                        case SETTINGS_CUSTOM_USER_AGENT:
-                            // Set the default custom user agent.
-                            nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
-                            break;
+                    case SETTINGS_CUSTOM_USER_AGENT:
+                        // Set the default custom user agent.
+                        nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+                        break;
 
-                        default:
-                            // Get the user agent string from the user agent data array
-                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
-                    }
+                    default:
+                        // Get the user agent string from the user agent data array
+                        nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
                 }
 
+                // Set the viewport.
+                nestedScrollWebView.getSettings().setUseWideViewPort(wideViewport);
+
                 // Set the loading of webpage images.
                 nestedScrollWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImages);
 
@@ -3843,11 +3685,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         String searchCustomUrlString = sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value));
         boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-        // Get a handle for the action bar.  `getSupportActionBar()` must be used until the minimum API >= 21.
-        ActionBar actionBar = getSupportActionBar();
-
-        // Remove the incorrect lint warning later that the action bar might be null.
-        assert actionBar != null;
+        // Get a handle for the app bar layout.
+        AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
 
         // Set the homepage, search, and proxy options.
         if (proxyThroughOrbot) {  // Set the Tor options.
@@ -3861,11 +3700,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
             OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
 
-            // Set the `appBar` background to indicate proxying through Orbot is enabled.
+            // Set the app bar background to indicate proxying through Orbot is enabled.
             if (darkTheme) {
-                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.dark_blue_30));
+                appBarLayout.setBackgroundResource(R.color.dark_blue_30);
             } else {
-                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
+                appBarLayout.setBackgroundResource(R.color.blue_50);
             }
 
             // Check to see if Orbot is ready.
@@ -3893,11 +3732,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Reset the proxy to default.  The host is `""` and the port is `"0"`.
             OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
 
-            // Set the default `appBar` background.
+            // Set the default app bar layout background.
             if (darkTheme) {
-                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_900));
+                appBarLayout.setBackgroundResource(R.color.gray_900);
             } else {
-                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_100));
+                appBarLayout.setBackgroundResource(R.color.gray_100);
             }
 
             // Reset `waitingForOrbot.
@@ -4155,7 +3994,66 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         startActivity(openWithBrowserIntent);
     }
 
+    private String sanitizeUrl(String url) {
+        // Sanitize Google Analytics.
+        if (sanitizeGoogleAnalytics) {
+            // Remove `?utm_`.
+            if (url.contains("?utm_")) {
+                url = url.substring(0, url.indexOf("?utm_"));
+            }
+
+            // Remove `&utm_`.
+            if (url.contains("&utm_")) {
+                url = url.substring(0, url.indexOf("&utm_"));
+            }
+        }
+
+        // Sanitize Facebook Click IDs.
+        if (sanitizeFacebookClickIds) {
+            // Remove `?fbclid=`.
+            if (url.contains("?fbclid=")) {
+                url = url.substring(0, url.indexOf("?fbclid="));
+            }
+
+            // Remove `&fbclid=`.
+            if (url.contains("&fbclid=")) {
+                url = url.substring(0, url.indexOf("&fbclid="));
+            }
+        }
+
+        // Sanitize Twitter AMP redirects.
+        if (sanitizeTwitterAmpRedirects) {
+            // Remove `?amp=1`.
+            if (url.contains("?amp=1")) {
+                url = url.substring(0, url.indexOf("?amp=1"));
+            }
+        }
+
+        // Return the sanitized URL.
+        return url;
+    }
+
+    public void finishedPopulatingBlocklists(ArrayList<ArrayList<List<String[]>>> combinedBlocklists) {
+        // Store the blocklists.
+        easyList = combinedBlocklists.get(0);
+        easyPrivacy = combinedBlocklists.get(1);
+        fanboysAnnoyanceList = combinedBlocklists.get(2);
+        fanboysSocialList = combinedBlocklists.get(3);
+        ultraPrivacy = combinedBlocklists.get(4);
+
+        // Add the first tab.
+        addNewTab("");
+    }
+
     public void addTab(View view) {
+        // Add a new tab with a blank URL.
+        addNewTab("");
+    }
+
+    private void addNewTab(String url) {
+        // Sanitize the URL.
+        url = sanitizeUrl(url);
+
         // Get a handle for the tab layout and the view pager.
         TabLayout tabLayout = findViewById(R.id.tablayout);
         ViewPager webViewPager = findViewById(R.id.webviewpager);
@@ -4176,7 +4074,218 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         newTab.setCustomView(R.layout.tab_custom_view);
 
         // Add the new WebView page.
-        webViewPagerAdapter.addPage(newTabNumber, webViewPager);
+        webViewPagerAdapter.addPage(newTabNumber, webViewPager, url);
+    }
+
+    public void closeTab(View view) {
+        // Get a handle for the tab layout.
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+
+        // Run the command according to the number of tabs.
+        if (tabLayout.getTabCount() > 1) {  // There is more than one tab open.
+            // Close the current tab.
+            closeCurrentTab();
+        } else {  // There is only one tab open.
+            clearAndExit();
+        }
+    }
+
+    private void closeCurrentTab() {
+        // Get handles for the views.
+        AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        ViewPager webViewPager = findViewById(R.id.webviewpager);
+
+        // Get the current tab number.
+        int currentTabNumber = tabLayout.getSelectedTabPosition();
+
+        // Delete the current tab.
+        tabLayout.removeTabAt(currentTabNumber);
+
+        // Delete the current page.  If the selected page number did not change during the delete, it will return true, meaning that the current WebView must be reset.
+        if (webViewPagerAdapter.deletePage(currentTabNumber, webViewPager)) {
+            setCurrentWebView(currentTabNumber);
+        }
+
+        // Expand the app bar if it is currently collapsed.
+        appBarLayout.setExpanded(true);
+    }
+
+    private void clearAndExit() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
+
+        // Get the status of the clear everything preference.
+        boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+
+        // Get a handle for the runtime.
+        Runtime runtime = Runtime.getRuntime();
+
+        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
+        // which links to `/data/data/com.stoutner.privacybrowser.standard`.
+        String privateDataDirectoryString = getApplicationInfo().dataDir;
+
+        // Clear cookies.
+        if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
+            // The command to remove cookies changed slightly in API 21.
+            if (Build.VERSION.SDK_INT >= 21) {
+                CookieManager.getInstance().removeAllCookies(null);
+            } else {
+                CookieManager.getInstance().removeAllCookie();
+            }
+
+            // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+            try {
+                // Two commands must be used because `Runtime.exec()` does not like `*`.
+                Process deleteCookiesProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
+                Process deleteCookiesJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
+
+                // Wait until the processes have finished.
+                deleteCookiesProcess.waitFor();
+                deleteCookiesJournalProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Clear DOM storage.
+        if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
+            // Ask `WebStorage` to clear the DOM storage.
+            WebStorage webStorage = WebStorage.getInstance();
+            webStorage.deleteAllData();
+
+            // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+            try {
+                // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                Process deleteLocalStorageProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
+
+                // Multiple commands must be used because `Runtime.exec()` does not like `*`.
+                Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
+                Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
+                Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
+                Process deleteDatabaseProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
+
+                // Wait until the processes have finished.
+                deleteLocalStorageProcess.waitFor();
+                deleteIndexProcess.waitFor();
+                deleteQuotaManagerProcess.waitFor();
+                deleteQuotaManagerJournalProcess.waitFor();
+                deleteDatabaseProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Clear form data if the API < 26.
+        if ((Build.VERSION.SDK_INT < 26) && (clearEverything || sharedPreferences.getBoolean("clear_form_data", true))) {
+            WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
+            webViewDatabase.clearFormData();
+
+            // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+            try {
+                // A string array must be used because the database contains a space and `Runtime.exec` will not otherwise escape the string correctly.
+                Process deleteWebDataProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
+                Process deleteWebDataJournalProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
+
+                // Wait until the processes have finished.
+                deleteWebDataProcess.waitFor();
+                deleteWebDataJournalProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Clear the cache.
+        if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
+            // Clear the cache from each WebView.
+            for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                // Get the WebView tab fragment.
+                WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+
+                // Get the fragment view.
+                View fragmentView = webViewTabFragment.getView();
+
+                // Only clear the cache if the WebView exists.
+                if (fragmentView != null) {
+                    // Get the nested scroll WebView from the tab fragment.
+                    NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                    // Clear the cache for this WebView.
+                    nestedScrollWebView.clearCache(true);
+                }
+            }
+
+            // Manually delete the cache directories.
+            try {
+                // Delete the main cache directory.
+                Process deleteCacheProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+
+                // Delete the secondary `Service Worker` cache directory.
+                // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                Process deleteServiceWorkerProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
+
+                // Wait until the processes have finished.
+                deleteCacheProcess.waitFor();
+                deleteServiceWorkerProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Wipe out each WebView.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
+
+            // Only wipe out the WebView if it exists.
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                // Clear SSL certificate preferences for this WebView.
+                nestedScrollWebView.clearSslPreferences();
+
+                // Clear the back/forward history for this WebView.
+                nestedScrollWebView.clearHistory();
+
+                // Destroy the internal state of `mainWebView`.
+                nestedScrollWebView.destroy();
+            }
+        }
+
+        // Clear the custom headers.
+        customHeaders.clear();
+
+        // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
+        // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
+        if (clearEverything) {
+            try {
+                // Delete the folder.
+                Process deleteAppWebviewProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
+
+                // Wait until the process has finished.
+                deleteAppWebviewProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
+        if (Build.VERSION.SDK_INT >= 21) {
+            finishAndRemoveTask();
+        } else {
+            finish();
+        }
+
+        // Remove the terminated program from RAM.  The status code is `0`.
+        System.exit(0);
     }
 
     private void setCurrentWebView(int pageNumber) {
@@ -4191,7 +4300,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         EditText urlEditText = findViewById(R.id.url_edittext);
         SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-        //Stop the swipe to refresh indicator if it is running
+        // Stop the swipe to refresh indicator if it is running
         swipeRefreshLayout.setRefreshing(false);
 
         // Get the WebView tab fragment.
@@ -4201,19 +4310,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         View fragmentView = webViewTabFragment.getView();
 
         // Set the current WebView if the fragment view is not null.
-        if (fragmentView != null) {
+        if (fragmentView != null) {  // The fragment has been populated.
             // Store the current WebView.
             currentWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
             // Update the status of swipe to refresh.
             if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
-                if (Build.VERSION.SDK_INT >= 23) {  // For API >= 23, swipe refresh layout is continuously updated with an on scroll change listener and only enabled if the WebView is scrolled to the top.
-                    // Enable the swipe refresh layout if the WebView is scrolled all the way to the top.
-                    swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
-                } else {
-                    // Enable the swipe refresh layout.
-                    swipeRefreshLayout.setEnabled(true);
-                }
+                // Enable the swipe refresh layout if the WebView is scrolled all the way to the top.  It is updated every time the scroll changes.
+                swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
             } else {  // Swipe to refresh is disabled.
                 // Disable the swipe refresh layout.
                 swipeRefreshLayout.setEnabled(false);
@@ -4237,27 +4341,33 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Get the current URL.
             String url = currentWebView.getUrl();
 
-            if ((url == null) || url.equals("about:blank")) {  // The WebView is blank.
-                // Display the hint in the URL edit text.
-                urlEditText.setText("");
+            // Update the URL edit text if not loading a new intent.  Otherwise, this will be handled by `onPageStarted()` (if called) and `onPageFinished()`.
+            if (!loadingNewIntent) {  // A new intent is not being loaded.
+                if ((url == null) || url.equals("about:blank")) {  // The WebView is blank.
+                    // Display the hint in the URL edit text.
+                    urlEditText.setText("");
 
-                // Request focus for the URL text box.
-                urlEditText.requestFocus();
+                    // Request focus for the URL text box.
+                    urlEditText.requestFocus();
 
-                // Display the keyboard.
-                inputMethodManager.showSoftInput(urlEditText, 0);
-            } else {  // The WebView has a loaded URL.
-                // Clear the focus from the URL text box.
-                urlEditText.clearFocus();
+                    // Display the keyboard.
+                    inputMethodManager.showSoftInput(urlEditText, 0);
+                } else {  // The WebView has a loaded URL.
+                    // Clear the focus from the URL text box.
+                    urlEditText.clearFocus();
 
-                // Hide the soft keyboard.
-                inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+                    // Hide the soft keyboard.
+                    inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
 
-                // Display the current URL in the URL text box.
-                urlEditText.setText(url);
+                    // Display the current URL in the URL text box.
+                    urlEditText.setText(url);
 
-                // Highlight the URL text.
-                highlightUrlText();
+                    // Highlight the URL text.
+                    highlightUrlText();
+                }
+            } else {  // A new intent is being loaded.
+                // Reset the loading new intent tracker.
+                loadingNewIntent = false;
             }
 
             // Set the background to indicate the domain settings status.
@@ -4271,11 +4381,23 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             } else {
                 urlRelativeLayout.setBackground(getResources().getDrawable(R.color.transparent));
             }
+        } else {  // The fragment has not been populated.  Try again in 100 milliseconds.
+            // Create a handler to set the current WebView.
+            Handler setCurrentWebViewHandler = new Handler();
+
+            // Create a runnable to set the current WebView.
+            Runnable setCurrentWebWebRunnable = () -> {
+                // Set the current WebView.
+                setCurrentWebView(pageNumber);
+            };
+
+            // Try setting the current WebView again after 100 milliseconds.
+            setCurrentWebViewHandler.postDelayed(setCurrentWebWebRunnable, 100);
         }
     }
 
     @Override
-    public void initializeWebView(NestedScrollWebView nestedScrollWebView, int pageNumber, ProgressBar progressBar) {
+    public void initializeWebView(NestedScrollWebView nestedScrollWebView, int pageNumber, ProgressBar progressBar, String url) {
         // Get handles for the activity views.
         FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
         DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
@@ -4296,7 +4418,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
         // Instantiate the blocklist helper.
-        BlockListHelper blockListHelper = new BlockListHelper();
+        BlocklistHelper blocklistHelper = new BlocklistHelper();
 
         // Remove the lint warning below that the input method manager might be null.
         assert inputMethodManager != null;
@@ -4304,9 +4426,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Get the relevant preferences.
-        boolean downloadWithExternalApp = sharedPreferences.getBoolean("download_with_external_app", false);
-
         // Initialize the favorite icon.
         nestedScrollWebView.initializeFavoriteIcon();
 
@@ -4324,9 +4443,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             nestedScrollWebView.getSettings().setMixedContentMode(WebSettings.MIXED_CONTENT_NEVER_ALLOW);
         }
 
-        // Set the WebView to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
-        nestedScrollWebView.getSettings().setUseWideViewPort(true);
-
         // Set the WebView to load in overview mode (zoomed out to the maximum width).
         nestedScrollWebView.getSettings().setLoadWithOverviewMode(true);
 
@@ -4344,6 +4460,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                     // Toggle the full screen browsing mode.
                     if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
+                        // Store the swipe refresh layout top padding.
+                        swipeRefreshLayoutPaddingTop = swipeRefreshLayout.getPaddingTop();
+
                         // Hide the app bar if specified.
                         if (hideAppBar) {
                             // Close the find on page bar if it is visible.
@@ -4354,6 +4473,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                             // Hide the action bar.
                             actionBar.hide();
+
+                            // Check to see if app bar scrolling is disabled.
+                            if (!scrollAppBar) {
+                                // Remove the padding from the top of the swipe refresh layout.
+                                swipeRefreshLayout.setPadding(0, 0, 0, 0);
+                            }
                         }
 
                         // Hide the banner ad in the free flavor.
@@ -4379,6 +4504,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         // Show the action bar.
                         actionBar.show();
 
+                        // Check to see if app bar scrolling is disabled.
+                        if (!scrollAppBar) {
+                            // Add the padding from the top of the swipe refresh layout.
+                            swipeRefreshLayout.setPadding(0, swipeRefreshLayoutPaddingTop, 0, 0);
+                        }
+
                         // Show the banner ad in the free flavor.
                         if (BuildConfig.FLAVOR.contentEquals("free")) {
                             // Reload the ad.
@@ -4413,14 +4544,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         registerForContextMenu(nestedScrollWebView);
 
         // Allow the downloading of files.
-        nestedScrollWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
+        nestedScrollWebView.setDownloadListener((String downloadUrl, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
             // Check if the download should be processed by an external app.
-            if (downloadWithExternalApp) {  // Download with an external app.
+            if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
                 // Create a download intent.  Not specifying the action type will display the maximum number of options.
                 Intent downloadIntent = new Intent();
 
                 // Set the URI and the MIME type.  Specifying `text/html` displays a good number of options.
-                downloadIntent.setDataAndType(Uri.parse(url), "text/html");
+                downloadIntent.setDataAndType(Uri.parse(downloadUrl), "text/html");
 
                 // Flag the intent to open in a new task.
                 downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
@@ -4433,7 +4564,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
 
                     // Store the variables for future use by `onRequestPermissionsResult()`.
-                    downloadUrl = url;
+                    this.downloadUrl = downloadUrl;
                     downloadContentDisposition = contentDisposition;
                     downloadContentLength = contentLength;
 
@@ -4450,7 +4581,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     }
                 } else {  // The storage permission has already been granted.
                     // Get a handle for the download file alert dialog.
-                    DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
+                    DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, contentDisposition, contentLength);
 
                     // Show the download file alert dialog.
                     downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
@@ -4481,15 +4612,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             }
         });
 
-        if (Build.VERSION.SDK_INT >= 23) {
-            nestedScrollWebView.setOnScrollChangeListener((View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) -> {
-                // Update the status of swipe to refresh if it is enabled.
-                if (nestedScrollWebView.getSwipeToRefresh()) {
-                    // Only enable swipe to refresh if the WebView is scrolled to the top.
-                    swipeRefreshLayout.setEnabled(scrollY == 0);
-                }
-            });
-        }
+        // Update the status of swipe to refresh based on the scroll position of the nested scroll WebView.
+        // Once the minimum API >= 23 this can be replaced with `nestedScrollWebView.setOnScrollChangeListener()`.
+        nestedScrollWebView.getViewTreeObserver().addOnScrollChangedListener(() -> {
+            if (nestedScrollWebView.getSwipeToRefresh()) {
+                // Only enable swipe to refresh if the WebView is scrolled to the top.
+                swipeRefreshLayout.setEnabled(nestedScrollWebView.getScrollY() == 0);
+            }
+        });
 
         // Set the web chrome client.
         nestedScrollWebView.setWebChromeClient(new WebChromeClient() {
@@ -4593,8 +4723,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Get the title text view from the tab.
                     TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
 
-                    // Set the title as the tab text.
-                    tabTitleTextView.setText(title);
+                    // Set the title according to the URL.
+                    if (title.equals("about:blank")) {
+                        // Set the title to indicate a new tab.
+                        tabTitleTextView.setText(R.string.new_tab);
+                    } else {
+                        // Set the title as the tab text.
+                        tabTitleTextView.setText(title);
+                    }
                 }
             }
 
@@ -4730,6 +4866,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // The deprecated `shouldOverrideUrlLoading` must be used until API >= 24.
             @Override
             public boolean shouldOverrideUrlLoading(WebView view, String url) {
+                // Sanitize the url.
+                url = sanitizeUrl(url);
+
                 if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
                     // Apply the domain settings for the new URL.  This doesn't do anything if the domain has not changed.
                     boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
@@ -4803,6 +4942,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
             @Override
             public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
+                // Sanitize the URL.
+                url = sanitizeUrl(url);
+
                 // Get a handle for the navigation view.
                 NavigationView navigationView = findViewById(R.id.navigationview);
 
@@ -4810,7 +4952,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 Menu navigationMenu = navigationView.getMenu();
 
                 // Get a handle for the navigation requests menu item.  The menu is 0 based.
-                MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
+                MenuItem navigationRequestsMenuItem = navigationMenu.getItem(5);
 
                 // Create an empty web resource response to be used if the resource request is blocked.
                 WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
@@ -4863,7 +5005,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Block third-party requests if enabled.
                 if (isThirdPartyRequest && nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS)) {
                     // Add the result to the resource requests.
-                    nestedScrollWebView.addResourceRequest(new String[]{BlockListHelper.REQUEST_THIRD_PARTY, url});
+                    nestedScrollWebView.addResourceRequest(new String[]{BlocklistHelper.REQUEST_THIRD_PARTY, url});
 
                     // Increment the blocked requests counters.
                     nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
@@ -4892,10 +5034,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Check UltraPrivacy if it is enabled.
                 if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY)) {
                     // Check the URL against UltraPrivacy.
-                    String[] ultraPrivacyResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, ultraPrivacy);
+                    String[] ultraPrivacyResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, ultraPrivacy);
 
                     // Process the UltraPrivacy results.
-                    if (ultraPrivacyResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched UltraPrivacy's blacklist.
+                    if (ultraPrivacyResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched UltraPrivacy's blacklist.
                         // Add the result to the resource requests.
                         nestedScrollWebView.addResourceRequest(new String[] {ultraPrivacyResults[0], ultraPrivacyResults[1], ultraPrivacyResults[2], ultraPrivacyResults[3], ultraPrivacyResults[4],
                                 ultraPrivacyResults[5]});
@@ -4921,7 +5063,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                         // The resource request was blocked.  Return an empty web resource response.
                         return emptyWebResourceResponse;
-                    } else if (ultraPrivacyResults[0].equals(BlockListHelper.REQUEST_ALLOWED)) {  // The resource request matched UltraPrivacy's whitelist.
+                    } else if (ultraPrivacyResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched UltraPrivacy's whitelist.
                         // Add a whitelist entry to the resource requests array.
                         nestedScrollWebView.addResourceRequest(new String[] {ultraPrivacyResults[0], ultraPrivacyResults[1], ultraPrivacyResults[2], ultraPrivacyResults[3], ultraPrivacyResults[4],
                                 ultraPrivacyResults[5]});
@@ -4934,10 +5076,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Check EasyList if it is enabled.
                 if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST)) {
                     // Check the URL against EasyList.
-                    String[] easyListResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyList);
+                    String[] easyListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyList);
 
                     // Process the EasyList results.
-                    if (easyListResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched EasyList's blacklist.
+                    if (easyListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched EasyList's blacklist.
                         // Add the result to the resource requests.
                         nestedScrollWebView.addResourceRequest(new String[] {easyListResults[0], easyListResults[1], easyListResults[2], easyListResults[3], easyListResults[4], easyListResults[5]});
 
@@ -4962,7 +5104,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                         // The resource request was blocked.  Return an empty web resource response.
                         return emptyWebResourceResponse;
-                    } else if (easyListResults[0].equals(BlockListHelper.REQUEST_ALLOWED)) {  // The resource request matched EasyList's whitelist.
+                    } else if (easyListResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched EasyList's whitelist.
                         // Update the whitelist result string array tracker.
                         whitelistResultStringArray = new String[] {easyListResults[0], easyListResults[1], easyListResults[2], easyListResults[3], easyListResults[4], easyListResults[5]};
                     }
@@ -4971,10 +5113,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Check EasyPrivacy if it is enabled.
                 if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY)) {
                     // Check the URL against EasyPrivacy.
-                    String[] easyPrivacyResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyPrivacy);
+                    String[] easyPrivacyResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, easyPrivacy);
 
                     // Process the EasyPrivacy results.
-                    if (easyPrivacyResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched EasyPrivacy's blacklist.
+                    if (easyPrivacyResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched EasyPrivacy's blacklist.
                         // Add the result to the resource requests.
                         nestedScrollWebView.addResourceRequest(new String[] {easyPrivacyResults[0], easyPrivacyResults[1], easyPrivacyResults[2], easyPrivacyResults[3], easyPrivacyResults[4],
                                 easyPrivacyResults[5]});
@@ -5000,7 +5142,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                         // The resource request was blocked.  Return an empty web resource response.
                         return emptyWebResourceResponse;
-                    } else if (easyPrivacyResults[0].equals(BlockListHelper.REQUEST_ALLOWED)) {  // The resource request matched EasyPrivacy's whitelist.
+                    } else if (easyPrivacyResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched EasyPrivacy's whitelist.
                         // Update the whitelist result string array tracker.
                         whitelistResultStringArray = new String[] {easyPrivacyResults[0], easyPrivacyResults[1], easyPrivacyResults[2], easyPrivacyResults[3], easyPrivacyResults[4], easyPrivacyResults[5]};
                     }
@@ -5009,10 +5151,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Check Fanboy’s Annoyance List if it is enabled.
                 if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST)) {
                     // Check the URL against Fanboy's Annoyance List.
-                    String[] fanboysAnnoyanceListResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList);
+                    String[] fanboysAnnoyanceListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList);
 
                     // Process the Fanboy's Annoyance List results.
-                    if (fanboysAnnoyanceListResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched Fanboy's Annoyance List's blacklist.
+                    if (fanboysAnnoyanceListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched Fanboy's Annoyance List's blacklist.
                         // Add the result to the resource requests.
                         nestedScrollWebView.addResourceRequest(new String[] {fanboysAnnoyanceListResults[0], fanboysAnnoyanceListResults[1], fanboysAnnoyanceListResults[2], fanboysAnnoyanceListResults[3],
                                 fanboysAnnoyanceListResults[4], fanboysAnnoyanceListResults[5]});
@@ -5039,17 +5181,17 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                         // The resource request was blocked.  Return an empty web resource response.
                         return emptyWebResourceResponse;
-                    } else if (fanboysAnnoyanceListResults[0].equals(BlockListHelper.REQUEST_ALLOWED)){  // The resource request matched Fanboy's Annoyance List's whitelist.
+                    } else if (fanboysAnnoyanceListResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)){  // The resource request matched Fanboy's Annoyance List's whitelist.
                         // Update the whitelist result string array tracker.
                         whitelistResultStringArray = new String[] {fanboysAnnoyanceListResults[0], fanboysAnnoyanceListResults[1], fanboysAnnoyanceListResults[2], fanboysAnnoyanceListResults[3],
                                 fanboysAnnoyanceListResults[4], fanboysAnnoyanceListResults[5]};
                     }
                 } else if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST)) {  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
                     // Check the URL against Fanboy's Annoyance List.
-                    String[] fanboysSocialListResults = blockListHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, fanboysSocialList);
+                    String[] fanboysSocialListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, fanboysSocialList);
 
                     // Process the Fanboy's Social Blocking List results.
-                    if (fanboysSocialListResults[0].equals(BlockListHelper.REQUEST_BLOCKED)) {  // The resource request matched Fanboy's Social Blocking List's blacklist.
+                    if (fanboysSocialListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched Fanboy's Social Blocking List's blacklist.
                         // Add the result to the resource requests.
                         nestedScrollWebView.addResourceRequest(new String[] {fanboysSocialListResults[0], fanboysSocialListResults[1], fanboysSocialListResults[2], fanboysSocialListResults[3],
                                 fanboysSocialListResults[4], fanboysSocialListResults[5]});
@@ -5076,7 +5218,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                         // The resource request was blocked.  Return an empty web resource response.
                         return emptyWebResourceResponse;
-                    } else if (fanboysSocialListResults[0].equals(BlockListHelper.REQUEST_ALLOWED)) {  // The resource request matched Fanboy's Social Blocking List's whitelist.
+                    } else if (fanboysSocialListResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched Fanboy's Social Blocking List's whitelist.
                         // Update the whitelist result string array tracker.
                         whitelistResultStringArray = new String[] {fanboysSocialListResults[0], fanboysSocialListResults[1], fanboysSocialListResults[2], fanboysSocialListResults[3],
                                 fanboysSocialListResults[4], fanboysSocialListResults[5]};
@@ -5087,7 +5229,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 if (whitelistResultStringArray != null) {  // The request was processed by a whitelist.
                     nestedScrollWebView.addResourceRequest(whitelistResultStringArray);
                 } else {  // The request didn't match any blocklist entry.  Log it as a default request.
-                    nestedScrollWebView.addResourceRequest(new String[]{BlockListHelper.REQUEST_DEFAULT, url});
+                    nestedScrollWebView.addResourceRequest(new String[]{BlocklistHelper.REQUEST_DEFAULT, url});
                 }
 
                 // The resource request has not been blocked.  `return null` loads the requested resource.
@@ -5109,9 +5251,31 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             @Override
             public void onPageStarted(WebView view, String url, Bitmap favicon) {
-                // Get the theme preference.
+                // Get the preferences.
+                boolean scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
                 boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
+                // Get a handler for the app bar layout.
+                AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
+
+                // Set the top padding of the swipe refresh layout according to the app bar scrolling preference.
+                if (scrollAppBar) {
+                    // No padding is needed because it will automatically be placed below the app bar layout due to the scrolling layout behavior.
+                    swipeRefreshLayout.setPadding(0, 0, 0, 0);
+
+                    // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                    swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10, defaultProgressViewEndOffset);
+                } else {
+                    // Get the app bar layout height.  This can't be done in `applyAppSettings()` because the app bar is not yet populated.
+                    int appBarHeight = appBarLayout.getHeight();
+
+                    // The swipe refresh layout must be manually moved below the app bar layout.
+                    swipeRefreshLayout.setPadding(0, appBarHeight, 0, 0);
+
+                    // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                    swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10 + appBarHeight, defaultProgressViewEndOffset + appBarHeight);
+                }
+
                 // Reset the list of resource requests.
                 nestedScrollWebView.clearResourceRequests();
 
@@ -5135,6 +5299,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                     // Update the URL text bar if the page is currently selected.
                     if (tabLayout.getSelectedTabPosition() == currentPagePosition) {
+                        // Clear the focus from the URL edit text.
+                        urlEditText.clearFocus();
+
                         // Display the formatted URL text.
                         urlEditText.setText(url);
 
@@ -5165,7 +5332,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         }
                     }
 
-                    // Replace Refresh with Stop if the options menu has been created.  (The WebView typically begins loading before the menu items are instantiated.)
+                    // Replace Refresh with Stop if the options menu has been created.  (The first WebView typically begins loading before the menu items are instantiated.)
                     if (optionsMenu != null) {
                         // Get a handle for the refresh menu item.
                         MenuItem refreshMenuItem = optionsMenu.findItem(R.id.refresh);
@@ -5190,12 +5357,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             @Override
             public void onPageFinished(WebView view, String url) {
-                // Reset the wide view port if it has been turned off by the waiting for Orbot message.
-                if (!waitingForOrbot) {
-                    // Only use a wide view port if the URL starts with `http`, not for `file://` and `content://`.
-                    nestedScrollWebView.getSettings().setUseWideViewPort(url.startsWith("http"));
-                }
-
                 // Flush any cookies to persistent storage.  The cookie manager has become very lazy about flushing cookies in recent versions.
                 if (nestedScrollWebView.getAcceptFirstPartyCookies() && Build.VERSION.SDK_INT >= 21) {
                     CookieManager.getInstance().flush();
@@ -5253,10 +5414,24 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Get the current page position.
                     int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                    // Update the URL text bar if the page is currently selected.
-                    if (tabLayout.getSelectedTabPosition() == currentPagePosition) {
+                    // Check the current website information against any pinned domain information if the current IP addresses have been loaded.
+                    if ((nestedScrollWebView.hasPinnedSslCertificate() || nestedScrollWebView.hasPinnedIpAddresses()) && nestedScrollWebView.hasCurrentIpAddresses() &&
+                            !nestedScrollWebView.ignorePinnedDomainInformation()) {
+                        CheckPinnedMismatchHelper.checkPinnedMismatch(getSupportFragmentManager(), nestedScrollWebView);
+                    }
+
+                    // Get the current URL from the nested scroll WebView.  This is more accurate than using the URL passed into the method, which is sometimes not the final one.
+                    String currentUrl = nestedScrollWebView.getUrl();
+
+                    // Get the current tab.
+                    TabLayout.Tab tab = tabLayout.getTabAt(currentPagePosition);
+
+                    // Update the URL text bar if the page is currently selected and the user is not currently typing in the URL edit text.
+                    // Crash records show that, in some crazy way, it is possible for the current URL to be blank at this point.
+                    // Probably some sort of race condition when Privacy Browser is being resumed.
+                    if ((tabLayout.getSelectedTabPosition() == currentPagePosition) && !urlEditText.hasFocus() && (currentUrl != null)) {
                         // Check to see if the URL is `about:blank`.
-                        if (url.equals("about:blank")) {  // The WebView is blank.
+                        if (currentUrl.equals("about:blank")) {  // The WebView is blank.
                             // Display the hint in the URL edit text.
                             urlEditText.setText("");
 
@@ -5266,28 +5441,46 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             // Display the keyboard.
                             inputMethodManager.showSoftInput(urlEditText, 0);
 
-                            // Hide the WebView, which causes the default background color to be displayed according to the theme.
-                            nestedScrollWebView.setVisibility(View.INVISIBLE);
-
                             // Apply the domain settings.  This clears any settings from the previous domain.
                             applyDomainSettings(nestedScrollWebView, "", true, false);
+
+                            // Only populate the title text view if the tab has been fully created.
+                            if (tab != null) {
+                                // Get the custom view from the tab.
+                                View tabView = tab.getCustomView();
+
+                                // Remove the incorrect warning below that the current tab view might be null.
+                                assert tabView != null;
+
+                                // Get the title text view from the tab.
+                                TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
+
+                                // Set the title as the tab text.
+                                tabTitleTextView.setText(R.string.new_tab);
+                            }
                         } else {  // The WebView has loaded a webpage.
-                            // Only update the URL text box if the user is not typing in it.
-                            if (!urlEditText.hasFocus()) {
-                                // Display the final URL.  Getting the URL from the WebView instead of using the one provided by `onPageFinished()` makes websites like YouTube function correctly.
-                                urlEditText.setText(nestedScrollWebView.getUrl());
+                            // Display the final URL.  Getting the URL from the WebView instead of using the one provided by `onPageFinished()` makes websites like YouTube function correctly.
+                            urlEditText.setText(currentUrl);
+
+                            // Apply text highlighting to the URL.
+                            highlightUrlText();
+
+                            // Only populate the title text view if the tab has been fully created.
+                            if (tab != null) {
+                                // Get the custom view from the tab.
+                                View tabView = tab.getCustomView();
+
+                                // Remove the incorrect warning below that the current tab view might be null.
+                                assert tabView != null;
 
-                                // Apply text highlighting to the URL.
-                                highlightUrlText();
+                                // Get the title text view from the tab.
+                                TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
+
+                                // Set the title as the tab text.  Sometimes `onReceivedTitle()` is not called, especially when navigating history.
+                                tabTitleTextView.setText(nestedScrollWebView.getTitle());
                             }
                         }
                     }
-
-                    // Check the current website information against any pinned domain information if the current IP addresses have been loaded.
-                    if ((nestedScrollWebView.hasPinnedSslCertificate() || nestedScrollWebView.hasPinnedIpAddresses()) && nestedScrollWebView.hasCurrentIpAddresses() &&
-                            !nestedScrollWebView.ignorePinnedDomainInformation()) {
-                        CheckPinnedMismatchHelper.checkPinnedMismatch(getSupportFragmentManager(), nestedScrollWebView);
-                    }
                 }
             }
 
@@ -5383,6 +5576,30 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     }
                 }
             }
+        } else {  // This is not the first tab.
+            // Apply the domain settings.
+            applyDomainSettings(nestedScrollWebView, url, false, false);
+
+            // Load the URL.
+            nestedScrollWebView.loadUrl(url, customHeaders);
+
+            // Set the focus and display the keyboard if the URL is blank.
+            if (url.equals("")) {
+                // Request focus for the URL text box.
+                urlEditText.requestFocus();
+
+                // Create a display keyboard handler.
+                Handler displayKeyboardHandler = new Handler();
+
+                // Create a display keyboard runnable.
+                Runnable displayKeyboardRunnable = () -> {
+                    // Display the keyboard.
+                    inputMethodManager.showSoftInput(urlEditText, 0);
+                };
+
+                // Display the keyboard after 100 milliseconds, which leaves enough time for the tab to transition.
+                displayKeyboardHandler.postDelayed(displayKeyboardRunnable, 100);
+            }
         }
     }
 }
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