]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
Disable screen timeout while playing fullscreen videos. https://redmine.stoutner...
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index 205331fddfc958cf93c6d01aa92480b7546d4658..cf19d3a18480c1963f87ecf20c0a0ca528fa40ac 100644 (file)
@@ -24,6 +24,7 @@ package com.stoutner.privacybrowser.activities;
 import android.Manifest;
 import android.annotation.SuppressLint;
 import android.app.Activity;
+import android.app.Dialog;
 import android.app.DownloadManager;
 import android.app.SearchManager;
 import android.content.ActivityNotFoundException;
@@ -49,6 +50,7 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.Handler;
+import android.os.Message;
 import android.preference.PreferenceManager;
 import android.print.PrintDocumentAdapter;
 import android.print.PrintManager;
@@ -71,6 +73,7 @@ import android.webkit.CookieManager;
 import android.webkit.HttpAuthHandler;
 import android.webkit.SslErrorHandler;
 import android.webkit.ValueCallback;
+import android.webkit.WebBackForwardList;
 import android.webkit.WebChromeClient;
 import android.webkit.WebResourceResponse;
 import android.webkit.WebSettings;
@@ -115,6 +118,8 @@ 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.asynctasks.SaveWebpageImage;
 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
@@ -125,15 +130,19 @@ import com.stoutner.privacybrowser.dialogs.DownloadLocationPermissionDialog;
 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
+import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
+import com.stoutner.privacybrowser.dialogs.SaveWebpageImageDialog;
 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
+import com.stoutner.privacybrowser.dialogs.StoragePermissionDialog;
 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;
+import com.stoutner.privacybrowser.helpers.FileNameHelper;
 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
 import com.stoutner.privacybrowser.views.NestedScrollWebView;
 
@@ -157,7 +166,8 @@ 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, PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveWebpageImageDialog.SaveWebpageImageListener,
+        StoragePermissionDialog.StoragePermissionDialogListener, UrlHistoryDialog.NavigateHistoryListener, 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;
@@ -184,6 +194,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
 
+    // Start activity for result request codes.
+    private final int FILE_UPLOAD_REQUEST_CODE = 0;
+    public final static int BROWSE_SAVE_WEBPAGE_IMAGE_REQUEST_CODE = 1;
 
 
     // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
@@ -199,11 +212,12 @@ 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;
     private ArrayList<List<String[]>> fanboysSocialList;
+    private ArrayList<List<String[]>> ultraList;
     private ArrayList<List<String[]>> ultraPrivacy;
 
     // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
@@ -279,6 +293,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // 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;
@@ -287,14 +306,26 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
     private String downloadImageUrl;
 
-    // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, `onRequestPermissionResult()`, and `initializeWebView()`.
+    // The save website image file path string is used in `onSaveWebpageImage()` and `onRequestPermissionResult()`
+    private String saveWebsiteImageFilePath;
+
+    // The permission result request codes are used in `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, `onRequestPermissionResult()`, `onSaveWebpageImage()`,
+    // `onCloseStoragePermissionDialog()`, and `initializeWebView()`.
     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
+    private final int SAVE_WEBPAGE_IMAGE_REQUEST_CODE = 3;
 
     @Override
     // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
     @SuppressLint("ClickableViewAccessibility")
     protected void onCreate(Bundle savedInstanceState) {
+        if (Build.VERSION.SDK_INT >= 21) {
+            WebView.enableSlowWholeDocumentDraw();
+        }
+
+        // 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);
 
@@ -320,14 +351,10 @@ 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);
@@ -342,3094 +369,3351 @@ 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);
+        // Initially disable the sliding drawers.  They will be enabled once the blocklists are loaded.
+        drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 
-        // 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);
+        // 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);
 
-                // Reapply the highlighting.
-                highlightUrlText();
-            }
-        });
+        // Initialize the web view pager adapter.
+        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
 
-        // 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();
+        // Set the pager adapter on the web view pager.
+        webViewPager.setAdapter(webViewPagerAdapter);
 
-                // 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;
-            }
-        });
+        // Store up to 100 tabs in memory.
+        webViewPager.setOffscreenPageLimit(100);
 
-        // Initialize the Orbot status and the waiting for Orbot trackers.
-        orbotStatus = "unknown";
-        waitingForOrbot = false;
+        // Populate the blocklists.
+        new PopulateBlocklists(this, this).execute();
+    }
 
-        // 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");
+    @Override
+    protected void onNewIntent(Intent intent) {
+        // Replace the intent that started the app with this one.
+        setIntent(intent);
 
-                // 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;
+        // Process the intent here if Privacy Browser is fully initialized.  If the process has been killed by the system while sitting in the background, this will be handled in `initializeWebView()`.
+        if (ultraPrivacy != null) {
+            // 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, true);
+                } 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());
+            // Close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
 
-                // Display the View SSL Certificate dialog.
-                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
-            }
-        });
+            // Reload the bookmarks drawer.
+            loadBookmarksFolder();
 
-        // Add the first tab.
-        addTab(null);
+            // Reset `restartFromBookmarksActivity`.
+            restartFromBookmarksActivity = false;
+        }
 
-        // 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));
-        }
+        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
+        updatePrivacyIcons(true);
+    }
 
-        // 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();
+    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
+    @Override
+    public void onResume() {
+        // Run the default commands.
+        super.onResume();
 
-            // Create a favorite icon byte array output stream.
-            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // 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);
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-            // Convert the favorite icon byte array stream to a byte array.
-            byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+            // 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);
 
-            // Create an intent to launch the bookmarks activity.
-            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
+                // Resume the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.resumeTimers();
 
-            // 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.
+                nestedScrollWebView.onResume();
+            }
+        }
 
-            // Make it so.
-            startActivity(bookmarksIntent);
-        });
+        // 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);
 
-        // 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());
+            // 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);
+        }
 
-            // Show the create bookmark folder dialog.
-            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
-        });
+        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
+            // Get a handle for the root frame layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-        // 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());
+            // 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);
 
-            // Display the create bookmark dialog.
-            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
-        });
+            /* 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));
+        }
+    }
 
-        // 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.
-            }
+    @Override
+    public void onPause() {
+        // Run the default commands.
+        super.onPause();
 
-            @Override
-            public void onTextChanged(CharSequence s, int start, int before, int count) {
-                // Do nothing.
-            }
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            @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());
-                }
-            }
-        });
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // 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);
+            // 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);
 
-                // Consume the event.
-                return true;
-            } else {  // A different key was pressed.
-                // Do not consume the event.
-                return false;
+                // Pause the nested scroll WebView.
+                nestedScrollWebView.onPause();
+
+                // Pause the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.pauseTimers();
             }
-        });
+        }
 
-        // Implement swipe to refresh.
-        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
+        // 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));
+        }
+    }
 
-        // Store the default progress view offsets for use later in `initializeWebView()`.
-        defaultProgressViewStartOffset = swipeRefreshLayout.getProgressViewStartOffset();
-        defaultProgressViewEndOffset = swipeRefreshLayout.getProgressViewEndOffset();
+    @Override
+    public void onDestroy() {
+        // Unregister the Orbot status broadcast receiver.
+        this.unregisterReceiver(orbotStatusBroadcastReceiver);
 
-        // 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);
-        }
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
 
-        // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
-        drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
-        drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
+        // Run the default commands.
+        super.onDestroy();
+    }
 
-        // 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);
+    @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);
 
-        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
-        currentBookmarksFolder = "";
+        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
+        optionsMenu = menu;
 
-        // Load the home folder, which is `""` in the database.
-        loadBookmarksFolder();
+        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
+        updatePrivacyIcons(false);
 
-        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;
+        // 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);
 
-            // Get the bookmark cursor for this ID and move it to the first row.
-            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
-            bookmarkCursor.moveToFirst();
+        // Only display third-party cookies if API >= 21
+        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
-            // 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));
+        // 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);
 
-                // 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)));
+        // 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);
 
-                // Close the bookmarks drawer.
-                drawerLayout.closeDrawer(GravityCompat.END);
+        // Only show Ad Consent if this is the free flavor.
+        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
+
+        // Get the shared preferences.
+        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);
+                }
             }
+        }
 
-            // Close the `Cursor`.
-            bookmarkCursor.close();
-        });
+        // Done.
+        return true;
+    }
 
-        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
-            // Convert the database ID from `long` to `int`.
-            int databaseId = (int) id;
+    @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 ultraListMenuItem = menu.findItem(R.id.ultralist);
+        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);
+
+        // 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.EASYLIST));
+            easyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
+            fanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+            fanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+            ultraListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
+            ultraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
+            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());
+
+            // 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.EASYLIST) + " - " + getString(R.string.easylist));
+            easyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYPRIVACY) + " - " + 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));
+            ultraListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRALIST) + " - " + getString(R.string.ultralist));
+            ultraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + 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) {
+        // 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();
+
+                // Consume the event.
+                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();
+
+                        // 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);
+                } else {  // Add a new domain.
+                    // Apply the new domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
 
-            // Find out if the selected bookmark is a folder.
-            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
+                    // Get the current domain
+                    Uri currentUri = Uri.parse(currentWebView.getUrl());
+                    String currentDomain = currentUri.getHost();
 
-            if (isFolder) {
-                // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
-                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+                    // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
+                    DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
 
-                // 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));
-            }
+                    // Create the domain and store the database ID.
+                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
 
-            // Consume the event.
-            return true;
-        });
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-        // Get the status bar pixel size.
-        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
-        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+                    // Add the extra information to the intent.
+                    domainsIntent.putExtra("load_domain", newDomainDatabaseId);
+                    domainsIntent.putExtra("close_on_back", true);
+                    domainsIntent.putExtra("current_url", currentWebView.getUrl());
 
-        // Get the resource density.
-        float screenDensity = getResources().getDisplayMetrics().density;
+                    // Get the current certificate.
+                    SslCertificate sslCertificate = currentWebView.getCertificate();
 
-        // 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);
+                    // 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();
 
-        // The drawer listener is used to update the navigation menu.`
-        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
-            @Override
-            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
-            }
+                        // 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);
+                    }
 
-            @Override
-            public void onDrawerOpened(@NonNull View drawerView) {
-            }
+                    // 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());
+                    }
 
-            @Override
-            public void onDrawerClosed(@NonNull View drawerView) {
-            }
+                    // Make it so.
+                    startActivity(domainsIntent);
+                }
 
-            @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);
+                // Consume the event.
+                return true;
 
-                    // 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);
-                    }
+            case R.id.toggle_first_party_cookies:
+                // Switch the first-party cookie status.
+                cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
 
-                    // 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);
-                    }
+                // Store the first-party cookie status.
+                currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
 
-                    // 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));
+                // Update the menu checkbox.
+                menuItem.setChecked(cookieManager.acceptCookie());
 
-                    // Hide the keyboard (if displayed).
-                    inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-                    // 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();
+                // Display a snackbar.
+                if (cookieManager.acceptCookie()) {  // First-party cookies are enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
+                } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
+                } else {  // Privacy mode.
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
                 }
-            }
-        });
 
-        // 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);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // 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", "");
+                // Consume the event.
+                return true;
 
-        // 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);
+            case R.id.toggle_third_party_cookies:
+                if (Build.VERSION.SDK_INT >= 21) {
+                    // Switch the status of thirdPartyCookiesEnabled.
+                    cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
 
-        // 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);
+                    // Update the menu checkbox.
+                    menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
 
-        // Get a handle for the WebView.
-        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
+                    // Display a snackbar.
+                    if (cookieManager.acceptThirdPartyCookies(currentWebView)) {
+                        Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
+                    } else {
+                        Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
+                    }
 
-        // Store the default user agent.
-        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
+                    // Reload the current WebView.
+                    currentWebView.reload();
+                } // Else do nothing because SDK < 21.
 
-        // Destroy the bare WebView.
-        bareWebView.destroy();
-    }
+                // Consume the event.
+                return true;
 
-    @Override
-    protected void onNewIntent(Intent intent) {
-        // Get the information from the intent.
-        String intentAction = intent.getAction();
-        Uri intentUriData = intent.getData();
+            case R.id.toggle_dom_storage:
+                // Toggle the status of domStorageEnabled.
+                currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
 
-        // 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) {
-            // Get the shared preferences.
-            SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
 
-            // Add a new tab if specified in the preferences.
-            if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {
-                // Set the loading new intent flag.
-                loadingNewIntent = true;
+                // Update the privacy icon.  `true` refreshes the app bar icons.
+                updatePrivacyIcons(true);
 
-                // Add a new tab.
-                addTab(null);
-            }
+                // Display a snackbar.
+                if (currentWebView.getSettings().getDomStorageEnabled()) {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
+                } else {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
+                }
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
 
-            // Create a URL string.
-            String url;
+            // Form data can be removed once the minimum API >= 26.
+            case R.id.toggle_save_form_data:
+                // Switch the status of saveFormDataEnabled.
+                currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
 
-            // 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;
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
 
-                // Sanitize the search input and convert it to a search.
-                try {
-                    encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
-                } catch (UnsupportedEncodingException exception) {
-                    encodedUrlString = "";
+                // Display a snackbar.
+                if (currentWebView.getSettings().getSaveFormData()) {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
+                } else {
+                    Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
                 }
 
-                // 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();
-            }
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-            // Load the URL.
-            loadUrl(url);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-            // Get a handle for the drawer layout.
-            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+                // Consume the event.
+                return true;
 
-            // Close the navigation drawer if it is open.
-            if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
-                drawerLayout.closeDrawer(GravityCompat.START);
-            }
+            case R.id.clear_cookies:
+                Snackbar.make(findViewById(R.id.webviewpager), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
+                        .setAction(R.string.undo, v -> {
+                            // Do nothing because everything will be handled by `onDismissed()` below.
+                        })
+                        .addCallback(new Snackbar.Callback() {
+                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                            @Override
+                            public void onDismissed(Snackbar snackbar, int event) {
+                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
+                                    // Delete the cookies, which command varies by SDK.
+                                    if (Build.VERSION.SDK_INT < 21) {
+                                        cookieManager.removeAllCookie();
+                                    } else {
+                                        cookieManager.removeAllCookies(null);
+                                    }
+                                }
+                            }
+                        })
+                        .show();
 
-            // Close the bookmarks drawer if it is open.
-            if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
-                drawerLayout.closeDrawer(GravityCompat.END);
-            }
+                // Consume the event.
+                return true;
 
-            // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
-            currentWebView.requestFocus();
-        }
-    }
+            case R.id.clear_dom_storage:
+                Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
+                        .setAction(R.string.undo, v -> {
+                            // Do nothing because everything will be handled by `onDismissed()` below.
+                        })
+                        .addCallback(new Snackbar.Callback() {
+                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                            @Override
+                            public void onDismissed(Snackbar snackbar, int event) {
+                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
+                                    // Delete the DOM Storage.
+                                    WebStorage webStorage = WebStorage.getInstance();
+                                    webStorage.deleteAllData();
 
-    @Override
-    public void onRestart() {
-        // Run the default commands.
-        super.onRestart();
+                                    // Initialize a handler to manually delete the DOM storage files and directories.
+                                    Handler deleteDomStorageHandler = new Handler();
+
+                                    // Setup a runnable to manually delete the DOM storage files and directories.
+                                    Runnable deleteDomStorageRunnable = () -> {
+                                        try {
+                                            // 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;
+
+                                            // A string array 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/"});
 
-        // 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");
+                                            // 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 deleteDatabasesProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
 
-            // Send the intent to the Orbot package.
-            orbotIntent.setPackage("org.torproject.android");
+                                            // Wait for the processes to finish.
+                                            deleteLocalStorageProcess.waitFor();
+                                            deleteIndexProcess.waitFor();
+                                            deleteQuotaManagerProcess.waitFor();
+                                            deleteQuotaManagerJournalProcess.waitFor();
+                                            deleteDatabasesProcess.waitFor();
+                                        } catch (Exception exception) {
+                                            // Do nothing if an error is thrown.
+                                        }
+                                    };
 
-            // Make it so.
-            sendBroadcast(orbotIntent);
-        }
+                                    // Manually delete the DOM storage files after 200 milliseconds.
+                                    deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
+                                }
+                            }
+                        })
+                        .show();
 
-        // Apply the app settings if returning from the Settings activity.
-        if (reapplyAppSettingsOnRestart) {
-            // Reset the reapply app settings on restart tracker.
-            reapplyAppSettingsOnRestart = false;
+                // Consume the event.
+                return true;
 
-            // Apply the app settings.
-            applyAppSettings();
-        }
+            // Form data can be remove once the minimum API >= 26.
+            case R.id.clear_form_data:
+                Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
+                        .setAction(R.string.undo, v -> {
+                            // Do nothing because everything will be handled by `onDismissed()` below.
+                        })
+                        .addCallback(new Snackbar.Callback() {
+                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
+                            @Override
+                            public void onDismissed(Snackbar snackbar, int event) {
+                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
+                                    // Delete the form data.
+                                    WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
+                                    mainWebViewDatabase.clearFormData();
+                                }
+                            }
+                        })
+                        .show();
 
-        // Apply the domain settings if returning from the settings or domains activity.
-        if (reapplyDomainSettingsOnRestart) {
-            // Reset the reapply domain settings on restart tracker.
-            reapplyDomainSettingsOnRestart = false;
+                // Consume the event.
+                return true;
 
-            // 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);
+            case R.id.easylist:
+                // Toggle the EasyList status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASYLIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
 
-                // Get the fragment view.
-                View fragmentView = webViewTabFragment.getView();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
 
-                // 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);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-                    // Reset the current domain name so the domain settings will be reapplied.
-                    nestedScrollWebView.resetCurrentDomainName();
+                // Consume the event.
+                return true;
 
-                    // 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 R.id.easyprivacy:
+                // Toggle the EasyPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
 
-        // Load the URL on restart (used when loading a bookmark).
-        if (loadUrlOnRestart) {
-            // Load the specified URL.
-            loadUrl(urlToLoadOnRestart);
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
 
-            // Reset the load on restart tracker.
-            loadUrlOnRestart = false;
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // 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);
+                // Consume the event.
+                return true;
 
-            // Close the bookmarks drawer.
-            drawerLayout.closeDrawer(GravityCompat.END);
+            case R.id.fanboys_annoyance_list:
+                // Toggle Fanboy's Annoyance List status.
+                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-            // Reload the bookmarks drawer.
-            loadBookmarksFolder();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-            // Reset `restartFromBookmarksActivity`.
-            restartFromBookmarksActivity = false;
-        }
+                // Update the staus of Fanboy's Social Blocking List.
+                MenuItem fanboysSocialBlockingListMenuItem = optionsMenu.findItem(R.id.fanboys_social_blocking_list);
+                fanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 
-        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
-        updatePrivacyIcons(true);
-    }
+                // Reload the current WebView.
+                currentWebView.reload();
 
-    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
-    @Override
-    public void onResume() {
-        // Run the default commands.
-        super.onResume();
+                // Consume the event.
+                return true;
 
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+            case R.id.fanboys_social_blocking_list:
+                // Toggle Fanboy's Social Blocking List status.
+                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
 
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
 
-            // 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);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-                // Resume the nested scroll WebView JavaScript timers.
-                nestedScrollWebView.resumeTimers();
+                // Consume the event.
+                return true;
 
-                // Resume the nested scroll WebView.
-                nestedScrollWebView.onResume();
-            }
-        }
+            case R.id.ultralist:
+                // Toggle the UltraList status.
+                currentWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
 
-        // 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);
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
 
-            // 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);
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
-            // Get a handle for the root frame layouts.
-            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+                // Consume the event.
+                return true;
 
-            // 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);
+            case R.id.ultraprivacy:
+                // Toggle the UltraPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
 
-            /* 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));
-        }
-    }
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
 
-    @Override
-    public void onPause() {
-        // Run the default commands.
-        super.onPause();
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+                // Consume the event.
+                return true;
 
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
+            case R.id.block_all_third_party_requests:
+                //Toggle the third-party requests blocker status.
+                currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-            // 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);
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-                // Pause the nested scroll WebView.
-                nestedScrollWebView.onPause();
+                // Reload the current WebView.
+                currentWebView.reload();
 
-                // Pause the nested scroll WebView JavaScript timers.
-                nestedScrollWebView.pauseTimers();
-            }
-        }
+                // Consume the event.
+                return 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));
-        }
-    }
+            case R.id.user_agent_privacy_browser:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
 
-    @Override
-    public void onDestroy() {
-        // Unregister the Orbot status broadcast receiver.
-        this.unregisterReceiver(orbotStatusBroadcastReceiver);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Close the bookmarks cursor and database.
-        bookmarksCursor.close();
-        bookmarksDatabaseHelper.close();
+                // Consume the event.
+                return true;
 
-        // Run the default commands.
-        super.onDestroy();
-    }
+            case R.id.user_agent_webview_default:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString("");
 
-    @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);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
-        optionsMenu = menu;
+                // Consume the event.
+                return true;
 
-        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(false);
+            case R.id.user_agent_firefox_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
 
-        // 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);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Only display third-party cookies if API >= 21
-        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
+                // Consume the event.
+                return true;
 
-        // 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);
+            case R.id.user_agent_chrome_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
 
-        // 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);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Only show Ad Consent if this is the free flavor.
-        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
+                // Consume the event.
+                return true;
 
-        // Get the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+            case R.id.user_agent_safari_on_ios:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
 
-        // 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);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // 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);
+            case R.id.user_agent_firefox_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
 
-            // 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);
-                }
-            }
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        return true;
-    }
+                // Consume the event.
+                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);
+            case R.id.user_agent_chromium_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
 
-        // Get a handle for the cookie manager.
-        CookieManager cookieManager = CookieManager.getInstance();
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Initialize the current user agent string and the font size.
-        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
-        int fontSize = 100;
+                // Consume the event.
+                return true;
 
-        // 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);
-            }
+            case R.id.user_agent_firefox_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
 
-            // Get the current user agent from the WebView.
-            currentUserAgent = currentWebView.getSettings().getUserAgentString();
+                // Reload the current WebView.
+                currentWebView.reload();
 
-            // Get the current font size from the
-            fontSize = currentWebView.getSettings().getTextZoom();
+                // Consume the event.
+                return true;
 
-            // 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());
+            case R.id.user_agent_chrome_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
 
-            // 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));
+                // Reload the current WebView.
+                currentWebView.reload();
 
-            // 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));
+                // Consume the event.
+                return true;
 
-                // Enable third-party cookies if first-party cookies are enabled.
-                thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
-            }
+            case R.id.user_agent_edge_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
 
-            // Enable DOM Storage if JavaScript is enabled.
-            domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Set the status of the menu item checkboxes.
-        firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
-        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
+                // Consume the event.
+                return true;
 
-        // Enable Clear Cookies if there are any.
-        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
+            case R.id.user_agent_internet_explorer_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
 
-        // 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;
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // 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;
-        }
+                // Consume the event.
+                return true;
 
-        // 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;
-        }
+            case R.id.user_agent_safari_on_macos:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
 
-        // Enable Clear DOM Storage if there is any.
-        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // 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);
+                // Consume the event.
+                return true;
 
-            // Enable the clear form data menu item if there is anything to clear.
-            clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
-        }
+            case R.id.user_agent_custom:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
 
-        // Enable Clear Data if any of the submenu items are enabled.
-        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
-        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
+                // Consume the event.
+                return true;
 
-        // 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);
-        }
+            case R.id.font_size_twenty_five_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(25);
 
-        // Instantiate the font size title and the selected font size menu item.
-        String fontSizeTitle;
-        MenuItem selectedFontSizeMenuItem;
+                // Consume the event.
+                return true;
 
-        // 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 R.id.font_size_fifty_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(50);
 
-            case 50:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
-                break;
+                // Consume the event.
+                return true;
 
-            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 R.id.font_size_seventy_five_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(75);
 
-            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;
+                // Consume the event.
+                return true;
 
-            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 R.id.font_size_one_hundred_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(100);
 
-            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;
+                // Consume the event.
+                return 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;
+            case R.id.font_size_one_hundred_twenty_five_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(125);
 
-            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;
+                // Consume the event.
+                return true;
 
-            default:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
-        }
+            case R.id.font_size_one_hundred_fifty_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(150);
 
-        // Set the font size title and select the current size menu item.
-        fontSizeMenuItem.setTitle(fontSizeTitle);
-        selectedFontSizeMenuItem.setChecked(true);
+                // Consume the event.
+                return true;
 
-        // Run all the other default commands.
-        super.onPrepareOptionsMenu(menu);
+            case R.id.font_size_one_hundred_seventy_five_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(175);
 
-        // Display the menu.
-        return true;
-    }
+                // Consume the event.
+                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);
+            case R.id.font_size_two_hundred_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(200);
 
-            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+                // Consume the event.
+                return true;
 
-            /* 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);
-        }
+            case R.id.swipe_to_refresh:
+                // Toggle the stored status of swipe to refresh.
+                currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
 
-        // Get the selected menu item ID.
-        int menuItemId = menuItem.getItemId();
+                // Get a handle for the swipe refresh layout.
+                SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Update the swipe refresh layout.
+                if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
+                    // 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);
+                }
 
-        // Get a handle for the cookie manager.
-        CookieManager cookieManager = CookieManager.getInstance();
+                // Consume the event.
+                return true;
 
-        // 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());
+            case R.id.wide_viewport:
+                // Toggle the viewport.
+                currentWebView.getSettings().setUseWideViewPort(!currentWebView.getSettings().getUseWideViewPort());
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // Consume the event.
+                return 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();
+            case R.id.display_images:
+                if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
+                    // Disable loading of images.
+                    currentWebView.getSettings().setLoadsImagesAutomatically(false);
+
+                    // Reload the website to remove existing images.
+                    currentWebView.reload();
+                } else {  // Images are not currently loaded automatically.
+                    // Enable loading of images.  Missing images will be loaded without the need for a reload.
+                    currentWebView.getSettings().setLoadsImagesAutomatically(true);
                 }
 
-                // Reload the current WebView.
+                // Consume the event.
+                return true;
+
+            case R.id.night_mode:
+                // Toggle night mode.
+                currentWebView.setNightMode(!currentWebView.getNightMode());
+
+                // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
+                if (currentWebView.getNightMode()) {  // Night mode is enabled, which requires JavaScript.
+                    // Enable JavaScript.
+                    currentWebView.getSettings().setJavaScriptEnabled(true);
+                } else if (currentWebView.getDomainSettingsApplied()) {  // Night mode is disabled and domain settings are applied.  Set JavaScript according to the domain settings.
+                    // Apply the JavaScript preference that was stored the last time domain settings were loaded.
+                    currentWebView.getSettings().setJavaScriptEnabled(currentWebView.getDomainSettingsJavaScriptEnabled());
+                } else {  // Night mode is disabled and domain settings are not applied.  Set JavaScript according to the global preference.
+                    // Apply the JavaScript preference.
+                    currentWebView.getSettings().setJavaScriptEnabled(sharedPreferences.getBoolean("javascript", false));
+                }
+
+                // Update the privacy icons.
+                updatePrivacyIcons(false);
+
+                // Reload the website.
                 currentWebView.reload();
+
+                // Consume the event.
                 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;
+            case R.id.find_on_page:
+                // 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);
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                // Set the minimum height of the find on page linear layout to match the toolbar.
+                findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
 
-                    // 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());
+                // Hide the toolbar.
+                toolbar.setVisibility(View.GONE);
 
-                    // Get the current certificate.
-                    SslCertificate sslCertificate = currentWebView.getCertificate();
+                // Show the find on page linear layout.
+                findOnPageLinearLayout.setVisibility(View.VISIBLE);
 
-                    // 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();
+                // Display the keyboard.  The app must wait 200 ms before running the command to work around a bug in Android.
+                // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
+                findOnPageEditText.postDelayed(() -> {
+                    // Set the focus on `findOnPageEditText`.
+                    findOnPageEditText.requestFocus();
 
-                        // 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);
-                    }
+                    // Get a handle for the input method manager.
+                    InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-                    // 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());
-                    }
+                    // Remove the lint warning below that the input method manager might be null.
+                    assert inputMethodManager != null;
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                } else {  // Add a new domain.
-                    // Apply the new domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
+                    // Display the keyboard.  `0` sets no input flags.
+                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
+                }, 200);
 
-                    // Get the current domain
-                    Uri currentUri = Uri.parse(currentWebView.getUrl());
-                    String currentDomain = currentUri.getHost();
+                // Consume the event.
+                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);
+
+                // Consume the event.
+                return true;
 
-                    // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
-                    DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
+            case R.id.save_as_image:
+                // Instantiate the save webpage image dialog.
+                DialogFragment saveWebpageImageDialogFragment = new SaveWebpageImageDialog();
 
-                    // Create the domain and store the database ID.
-                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
+                // Show the save webpage image dialog.
+                saveWebpageImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.save_as_image));
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                // Consume the event.
+                return true;
 
-                    // Add the extra information to the intent.
-                    domainsIntent.putExtra("load_domain", newDomainDatabaseId);
-                    domainsIntent.putExtra("close_on_back", true);
-                    domainsIntent.putExtra("current_url", currentWebView.getUrl());
+            case R.id.add_to_homescreen:
+                // Instantiate the create home screen shortcut dialog.
+                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
+                        currentWebView.getFavoriteOrDefaultIcon());
 
-                    // Get the current certificate.
-                    SslCertificate sslCertificate = currentWebView.getCertificate();
+                // Show the create home screen shortcut dialog.
+                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
 
-                    // 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();
+                // Consume the event.
+                return true;
 
-                        // 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);
-                    }
+            case R.id.view_source:
+                // Create an intent to launch the view source activity.
+                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
 
-                    // 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());
-                    }
+                // Add the variables to the intent.
+                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
+                viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                }
+                // Make it so.
+                startActivity(viewSourceIntent);
+
+                // Consume the event.
                 return true;
 
-            case R.id.toggle_first_party_cookies:
-                // Switch the first-party cookie status.
-                cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
+            case R.id.share_url:
+                // Setup the share string.
+                String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
 
-                // Store the first-party cookie status.
-                currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
+                // Create the share intent.
+                Intent shareIntent = new Intent(Intent.ACTION_SEND);
+                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
+                shareIntent.setType("text/plain");
 
-                // Update the menu checkbox.
-                menuItem.setChecked(cookieManager.acceptCookie());
+                // Make it so.
+                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // Consume the event.
+                return true;
 
-                // Display a snackbar.
-                if (cookieManager.acceptCookie()) {  // First-party cookies are enabled.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
-                } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
-                } else {  // Privacy mode.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
-                }
+            case R.id.open_with_app:
+                // Open the URL with an outside app.
+                openWithApp(currentWebView.getUrl());
 
-                // Reload the current WebView.
-                currentWebView.reload();
+                // Consume the event.
                 return true;
 
-            case R.id.toggle_third_party_cookies:
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Switch the status of thirdPartyCookiesEnabled.
-                    cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
+            case R.id.open_with_browser:
+                // Open the URL with an outside browser.
+                openWithBrowser(currentWebView.getUrl());
 
-                    // Update the menu checkbox.
-                    menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
+                // Consume the event.
+                return true;
 
-                    // Display a snackbar.
-                    if (cookieManager.acceptThirdPartyCookies(currentWebView)) {
-                        Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
-                    } else {
-                        Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
-                    }
+            case R.id.proxy_through_orbot:
+                // Toggle the proxy through Orbot variable.
+                proxyThroughOrbot = !proxyThroughOrbot;
+
+                // Apply the proxy through Orbot settings.
+                applyProxyThroughOrbot(true);
+
+                // Consume the event.
+                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 do nothing because SDK < 21.
+                } else {  // The stop button was pushed.
+                    // Stop the loading of the WebView.
+                    currentWebView.stopLoading();
+                }
+
+                // Consume the event.
                 return true;
 
-            case R.id.toggle_dom_storage:
-                // Toggle the status of domStorageEnabled.
-                currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
+            case R.id.ad_consent:
+                // Instantiate the ad consent dialog.
+                DialogFragment adConsentDialogFragment = new AdConsentDialog();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+                // Display the ad consent dialog.
+                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
 
-                // Update the privacy icon.  `true` refreshes the app bar icons.
-                updatePrivacyIcons(true);
+                // Consume the event.
+                return true;
 
-                // Display a snackbar.
-                if (currentWebView.getSettings().getDomStorageEnabled()) {
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
+            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 {
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
+                    // Load the normal homepage.
+                    loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
                 }
+                break;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+            case R.id.back:
+                if (currentWebView.canGoBack()) {
+                    // Get the current web back forward list.
+                    WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-            // Form data can be removed once the minimum API >= 26.
-            case R.id.toggle_save_form_data:
-                // Switch the status of saveFormDataEnabled.
-                currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
+                    // Get the previous entry URL.
+                    String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
+                    // Reset the current domain name so that navigation works if third-party requests are blocked.
+                    currentWebView.resetCurrentDomainName();
 
-                // Display a snackbar.
-                if (currentWebView.getSettings().getSaveFormData()) {
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
-                } else {
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
+                    // Apply the domain settings.
+                    applyDomainSettings(currentWebView, previousUrl, false, false);
+
+                    // Load the previous website in the history.
+                    currentWebView.goBack();
                 }
+                break;
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+            case R.id.forward:
+                if (currentWebView.canGoForward()) {
+                    // Get the current web back forward list.
+                    WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                    // Get the next entry URL.
+                    String nextUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() + 1).getUrl();
 
-            case R.id.clear_cookies:
-                Snackbar.make(findViewById(R.id.webviewpager), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
-                                    // Delete the cookies, which command varies by SDK.
-                                    if (Build.VERSION.SDK_INT < 21) {
-                                        cookieManager.removeAllCookie();
-                                    } else {
-                                        cookieManager.removeAllCookies(null);
-                                    }
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+                    // Reset the current domain name so that navigation works if third-party requests are blocked.
+                    currentWebView.resetCurrentDomainName();
 
-            case R.id.clear_dom_storage:
-                Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
-                                    // Delete the DOM Storage.
-                                    WebStorage webStorage = WebStorage.getInstance();
-                                    webStorage.deleteAllData();
+                    // Apply the domain settings.
+                    applyDomainSettings(currentWebView, nextUrl, false, false);
 
-                                    // Initialize a handler to manually delete the DOM storage files and directories.
-                                    Handler deleteDomStorageHandler = new Handler();
+                    // Load the next website in the history.
+                    currentWebView.goForward();
+                }
+                break;
 
-                                    // Setup a runnable to manually delete the DOM storage files and directories.
-                                    Runnable deleteDomStorageRunnable = () -> {
-                                        try {
-                                            // Get a handle for the runtime.
-                                            Runtime runtime = Runtime.getRuntime();
+            case R.id.history:
+                // Instantiate the URL history dialog.
+                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
 
-                                            // 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;
+                // Show the URL history dialog.
+                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
+                break;
 
-                                            // A string array 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/"});
+            case R.id.requests:
+                // Populate the resource requests.
+                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
 
-                                            // 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 deleteDatabasesProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
+                // Create an intent to launch the Requests activity.
+                Intent requestsIntent = new Intent(this, RequestsActivity.class);
 
-                                            // Wait for the processes to finish.
-                                            deleteLocalStorageProcess.waitFor();
-                                            deleteIndexProcess.waitFor();
-                                            deleteQuotaManagerProcess.waitFor();
-                                            deleteQuotaManagerJournalProcess.waitFor();
-                                            deleteDatabasesProcess.waitFor();
-                                        } catch (Exception exception) {
-                                            // Do nothing if an error is thrown.
-                                        }
-                                    };
+                // Add the block third-party requests status to the intent.
+                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-                                    // Manually delete the DOM storage files after 200 milliseconds.
-                                    deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+                // Make it so.
+                startActivity(requestsIntent);
+                break;
 
-            // Form data can be remove once the minimum API >= 26.
-            case R.id.clear_form_data:
-                Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
-                                    // Delete the form data.
-                                    WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
-                                    mainWebViewDatabase.clearFormData();
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+            case R.id.downloads:
+                // Launch the system Download Manager.
+                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
 
-            case R.id.easylist:
-                // Toggle the EasyList status.
-                currentWebView.enableBlocklist(NestedScrollWebView.EASY_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
+                // 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);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
+                startActivity(downloadManagerIntent);
+                break;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+            case R.id.domains:
+                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
+                reapplyDomainSettingsOnRestart = true;
 
-            case R.id.easyprivacy:
-                // Toggle the EasyPrivacy status.
-                currentWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
+                // Launch the domains activity.
+                Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
+                // Add the extra information to the intent.
+                domainsIntent.putExtra("current_url", currentWebView.getUrl());
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Get the current certificate.
+                SslCertificate sslCertificate = currentWebView.getCertificate();
 
-            case R.id.fanboys_annoyance_list:
-                // Toggle Fanboy's Annoyance List status.
-                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+                // 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();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+                    // 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 staus of Fanboy's Social Blocking List.
-                MenuItem fanboysSocialBlockingListMenuItem = optionsMenu.findItem(R.id.fanboys_social_blocking_list);
-                fanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+                // 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());
+                }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Make it so.
+                startActivity(domainsIntent);
+                break;
 
-            case R.id.fanboys_social_blocking_list:
-                // Toggle Fanboy's Social Blocking List status.
-                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+            case R.id.settings:
+                // Set the flag to reapply app settings on restart when returning from Settings.
+                reapplyAppSettingsOnRestart = true;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+                // Set the flag to reapply the domain settings on restart when returning from Settings.
+                reapplyDomainSettingsOnRestart = true;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Launch the settings activity.
+                Intent settingsIntent = new Intent(this, SettingsActivity.class);
+                startActivity(settingsIntent);
+                break;
 
-            case R.id.ultraprivacy:
-                // Toggle the UltraPrivacy status.
-                currentWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
+            case R.id.import_export:
+                // Launch the import/export activity.
+                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
+                startActivity(importExportIntent);
+                break;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
+            case R.id.logcat:
+                // Launch the logcat activity.
+                Intent logcatIntent = new Intent(this, LogcatActivity.class);
+                startActivity(logcatIntent);
+                break;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+            case R.id.guide:
+                // Launch `GuideActivity`.
+                Intent guideIntent = new Intent(this, GuideActivity.class);
+                startActivity(guideIntent);
+                break;
 
-            case R.id.block_all_third_party_requests:
-                //Toggle the third-party requests blocker status.
-                currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            case R.id.about:
+                // Create an intent to launch the about activity.
+                Intent aboutIntent = new Intent(this, AboutActivity.class);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+                // 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],
+                        ultraList.get(0).get(0)[0], ultraPrivacy.get(0).get(0)[0]};
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Add the blocklist versions to the intent.
+                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
 
-            case R.id.user_agent_privacy_browser:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
+                // Make it so.
+                startActivity(aboutIntent);
+                break;
+        }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-            case R.id.user_agent_webview_default:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString("");
+        // Close the navigation drawer.
+        drawerLayout.closeDrawer(GravityCompat.START);
+        return true;
+    }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+    @Override
+    public void onPostCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onPostCreate(savedInstanceState);
 
-            case R.id.user_agent_firefox_on_android:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
+        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
+        actionBarDrawerToggle.syncState();
+    }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        // Run the default commands.
+        super.onConfigurationChanged(newConfig);
 
-            case R.id.user_agent_chrome_on_android:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-            case R.id.user_agent_safari_on_ios:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
+        // Recalculate the drawer header padding.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // 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));
+        }
 
-            case R.id.user_agent_firefox_on_linux:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
+        // `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);
+    }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
+        // Store the hit test result.
+        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
 
-            case R.id.user_agent_chromium_on_linux:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
+        // Define the URL strings.
+        final String imageUrl;
+        final String linkUrl;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Get handles for the system managers.
+        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+        FragmentManager fragmentManager = getSupportFragmentManager();
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            case R.id.user_agent_firefox_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
+        // Remove the lint errors below that the clipboard manager might be null.
+        assert clipboardManager != null;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // 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();
 
-            case R.id.user_agent_chrome_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // 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, false);
 
-            case R.id.user_agent_edge_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
+                    // Consume the event.
+                    return true;
+                });
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(linkUrl);
 
-            case R.id.user_agent_internet_explorer_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
+                    // Consume the event.
+                    return true;
+                });
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(linkUrl);
 
-            case R.id.user_agent_safari_on_macos:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
+                    // Consume the event.
+                    return true;
+                });
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // 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);
 
-            case R.id.user_agent_custom:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.font_size_twenty_five_percent:
-                currentWebView.getSettings().setTextZoom(25);
-                return 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;
 
-            case R.id.font_size_fifty_percent:
-                currentWebView.getSettings().setTextZoom(50);
-                return 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_FILE.
+                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
 
-            case R.id.font_size_seventy_five_percent:
-                currentWebView.getSettings().setTextZoom(75);
-                return true;
+                                // 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);
 
-            case R.id.font_size_one_hundred_percent:
-                currentWebView.getSettings().setTextZoom(100);
-                return true;
+                            // Show the download file alert dialog.
+                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
 
-            case R.id.font_size_one_hundred_twenty_five_percent:
-                currentWebView.getSettings().setTextZoom(125);
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.font_size_one_hundred_fifty_percent:
-                currentWebView.getSettings().setTextZoom(150);
-                return true;
+                // Add a Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
 
-            case R.id.font_size_one_hundred_seventy_five_percent:
-                currentWebView.getSettings().setTextZoom(175);
-                return true;
+            case WebView.HitTestResult.EMAIL_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
 
-            case R.id.font_size_two_hundred_percent:
-                currentWebView.getSettings().setTextZoom(200);
-                return true;
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-            case R.id.swipe_to_refresh:
-                // Toggle the stored status of swipe to refresh.
-                currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
+                // 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);
 
-                // Get a handle for the swipe refresh layout.
-                SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+                    // Parse the url and set it as the data for the `Intent`.
+                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
 
-                // 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);
-                    }
-                } else {  // Swipe to refresh is disabled.
-                    // Disable the swipe refresh layout.
-                    swipeRefreshLayout.setEnabled(false);
-                }
-                return true;
+                    // `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);
 
-            case R.id.display_images:
-                if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
-                    // Disable loading of images.
-                    currentWebView.getSettings().setLoadsImagesAutomatically(false);
+                    // Make it so.
+                    startActivity(emailIntent);
 
-                    // Reload the website to remove existing images.
-                    currentWebView.reload();
-                } else {  // Images are not currently loaded automatically.
-                    // Enable loading of images.  Missing images will be loaded without the need for a reload.
-                    currentWebView.getSettings().setLoadsImagesAutomatically(true);
-                }
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.night_mode:
-                // Toggle night mode.
-                currentWebView.setNightMode(!currentWebView.getNightMode());
+                // 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);
 
-                // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
-                if (currentWebView.getNightMode()) {  // Night mode is enabled, which requires JavaScript.
-                    // Enable JavaScript.
-                    currentWebView.getSettings().setJavaScriptEnabled(true);
-                } else if (currentWebView.getDomainSettingsApplied()) {  // Night mode is disabled and domain settings are applied.  Set JavaScript according to the domain settings.
-                    // Apply the JavaScript preference that was stored the last time domain settings were loaded.
-                    currentWebView.getSettings().setJavaScriptEnabled(currentWebView.getDomainSettingsJavaScriptEnabled());
-                } else {  // Night mode is disabled and domain settings are not applied.  Set JavaScript according to the global preference.
-                    // Apply the JavaScript preference.
-                    currentWebView.getSettings().setJavaScriptEnabled(sharedPreferences.getBoolean("javascript", false));
-                }
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
 
-                // Update the privacy icons.
-                updatePrivacyIcons(false);
+                    // Consume the event.
+                    return true;
+                });
 
-                // Reload the website.
-                currentWebView.reload();
-                return true;
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
 
-            case R.id.find_on_page:
-                // 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);
+            // `IMAGE_TYPE` is an image.
+            case WebView.HitTestResult.IMAGE_TYPE:
+                // Get the image URL.
+                imageUrl = hitTestResult.getExtra();
 
-                // Set the minimum height of the find on page linear layout to match the toolbar.
-                findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
+                // Set the image URL as the title of the context menu.
+                menu.setHeaderTitle(imageUrl);
 
-                // Hide the toolbar.
-                toolbar.setVisibility(View.GONE);
+                // Add an Open in New Tab entry.
+                menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the image in a new tab.
+                    addNewTab(imageUrl, false);
 
-                // Show the find on page linear layout.
-                findOnPageLinearLayout.setVisibility(View.VISIBLE);
+                    // Consume the event.
+                    return true;
+                });
 
-                // Display the keyboard.  The app must wait 200 ms before running the command to work around a bug in Android.
-                // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
-                findOnPageEditText.postDelayed(() -> {
-                    // Set the focus on `findOnPageEditText`.
-                    findOnPageEditText.requestFocus();
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    // Load the image in the current tab.
+                    loadUrl(imageUrl);
 
-                    // Get a handle for the input method manager.
-                    InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+                    // Consume the event.
+                    return true;
+                });
 
-                    // Remove the lint warning below that the input method manager might be null.
-                    assert inputMethodManager != null;
+                // 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;
 
-                    // Display the keyboard.  `0` sets no input flags.
-                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
-                }, 200);
-                return 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);
 
-            case R.id.view_source:
-                // Create an intent to launch the view source activity.
-                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
+                                // 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);
 
-                // Add the variables to the intent.
-                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
-                viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
 
-                // Make it so.
-                startActivity(viewSourceIntent);
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.share_url:
-                // Setup the share string.
-                String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
+                // Add a Copy URL entry.
+                menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Save the image URL in a clip data.
+                    ClipData imageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
 
-                // Create the share intent.
-                Intent shareIntent = new Intent(Intent.ACTION_SEND);
-                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
-                shareIntent.setType("text/plain");
+                    // Set the clip data as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(imageTypeClipData);
 
-                // Make it so.
-                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.print:
-                // Get a print manager instance.
-                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Open the image URL with an external app.
+                    openWithApp(imageUrl);
 
-                // Remove the lint error below that print manager might be null.
-                assert printManager != null;
+                    // Consume the event.
+                    return true;
+                });
 
-                // Create a print document adapter from the current WebView.
-                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Open the image URL with an external browser.
+                    openWithBrowser(imageUrl);
 
-                // Print the document.
-                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.open_with_app:
-                openWithApp(currentWebView.getUrl());
-                return true;
+                // Add a Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
 
-            case R.id.open_with_browser:
-                openWithBrowser(currentWebView.getUrl());
-                return true;
+            // `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();
 
-            case R.id.add_to_homescreen:
-                // Instantiate the create home screen shortcut dialog.
-                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
-                        currentWebView.getFavoriteOrDefaultIcon());
+                // Instantiate a handler.
+                Handler handler = new Handler();
 
-                // Show the create home screen shortcut dialog.
-                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
-                return true;
+                // Get a message from the handler.
+                Message message = handler.obtainMessage();
 
-            case R.id.proxy_through_orbot:
-                // Toggle the proxy through Orbot variable.
-                proxyThroughOrbot = !proxyThroughOrbot;
+                // Request the image details from the last touched node be returned in the message.
+                currentWebView.requestFocusNodeHref(message);
 
-                // Apply the proxy through Orbot settings.
-                applyProxyThroughOrbot(true);
-                return true;
+                // Get the link URL from the message data.
+                linkUrl = message.getData().getString("url");
 
-            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;
+                // Set the link URL as the title of the context menu.
+                menu.setHeaderTitle(linkUrl);
 
-            case R.id.ad_consent:
-                // Display the ad consent dialog.
-                DialogFragment adConsentDialogFragment = new AdConsentDialog();
-                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
-                return true;
+                // 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, false);
 
-            default:
-                // Don't consume the event.
-                return super.onOptionsItemSelected(menuItem);
-        }
-    }
+                    // Consume the event.
+                    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();
+                // Add an Open Image in New Tab entry.
+                menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the image in a new tab.
+                    addNewTab(imageUrl, false);
 
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                    // Consume the event.
+                    return true;
+                });
 
-        // Run the commands that correspond to the selected menu item.
-        switch (menuItemId) {
-            case R.id.close_tab:
-                // Close the current tab.
-                closeCurrentTab();
-                break;
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener((MenuItem item) -> {
+                   // View the image in the current tab.
+                   loadUrl(imageUrl);
 
-            case R.id.clear_and_exit:
-                // Close the bookmarks cursor and database.
-                bookmarksCursor.close();
-                bookmarksDatabaseHelper.close();
+                   // Consume the event.
+                   return true;
+                });
 
-                // Get the status of the clear everything preference.
-                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+                // 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;
 
-                // Get a handle for the runtime.
-                Runtime runtime = Runtime.getRuntime();
+                            // 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);
 
-                // 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;
+                                // 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);
 
-                // 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();
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
                     }
 
-                    // 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.
-                    }
-                }
+                    // Consume the event.
+                    return true;
+                });
 
-                // Clear DOM storage.
-                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                    // Ask `WebStorage` to clear the DOM storage.
-                    WebStorage webStorage = WebStorage.getInstance();
-                    webStorage.deleteAllData();
+                // Add a Copy URL entry.
+                menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Save the link URL in a clip data.
+                    ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
 
-                    // 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 clip data as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
 
-                // 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();
+                    // Consume the event.
+                    return true;
+                });
 
-                    // 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) -> {
+                    // Open the link URL with an external app.
+                    openWithApp(linkUrl);
 
-                // 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);
+                    // Consume the event.
+                    return true;
+                });
 
-                        // Get the fragment view.
-                        View fragmentView = webViewTabFragment.getView();
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Open the link URL with an external browser.
+                    openWithBrowser(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);
+                    // Consume the event.
+                    return true;
+                });
 
-                            // Clear the cache for this WebView.
-                            nestedScrollWebView.clearCache(true);
-                        }
-                    }
+                // Add a cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
+        }
+    }
 
-                    // Manually delete the cache directories.
-                    try {
-                        // Delete the main cache directory.
-                        Process deleteCacheProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+    @Override
+    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-                        // 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/"});
+        // 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);
 
-                        // Wait until the processes have finished.
-                        deleteCacheProcess.waitFor();
-                        deleteServiceWorkerProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+        // Extract the strings from the edit texts.
+        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 
-                // Wipe out each WebView.
-                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-                    // Get the WebView tab fragment.
-                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+        // Create a favorite icon byte array output stream.
+        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                    // Get the fragment view.
-                    View fragmentView = webViewTabFragment.getView();
+        // 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);
 
-                    // 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);
+        // Convert the favorite icon byte array stream to a byte array.
+        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-                        // Clear SSL certificate preferences for this WebView.
-                        nestedScrollWebView.clearSslPreferences();
+        // Display the new bookmark below the current items in the (0 indexed) list.
+        int newBookmarkDisplayOrder = bookmarksListView.getCount();
 
-                        // Clear the back/forward history for this WebView.
-                        nestedScrollWebView.clearHistory();
+        // Create the bookmark.
+        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 
-                        // Destroy the internal state of `mainWebView`.
-                        nestedScrollWebView.destroy();
-                    }
-                }
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Clear the custom headers.
-                customHeaders.clear();
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                // 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");
+        // Scroll to the new bookmark.
+        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    }
 
-                        // Wait until the process has finished.
-                        deleteAppWebviewProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+    @Override
+    public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    finishAndRemoveTask();
-                } else {
-                    finish();
-                }
+        // 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);
 
-                // Remove the terminated program from RAM.  The status code is `0`.
-                System.exit(0);
-                break;
+        // Get new folder name string.
+        String folderNameString = createFolderNameEditText.getText().toString();
+
+        // Create a folder icon bitmap.
+        Bitmap folderIconBitmap;
+
+        // 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.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;
+            // Convert the folder icon drawable to a bitmap drawable.
+            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-            case R.id.back:
-                if (currentWebView.canGoBack()) {
-                    // Reset the current domain name so that navigation works if third-party requests are blocked.
-                    currentWebView.resetCurrentDomainName();
+            // 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 navigating history so that the domain settings are applied when the new URL is loaded.
-                    currentWebView.setNavigatingHistory(true);
+        // Create a folder icon byte array output stream.
+        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                    // Load the previous website in the history.
-                    currentWebView.goBack();
-                }
-                break;
+        // 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);
 
-            case R.id.forward:
-                if (currentWebView.canGoForward()) {
-                    // Reset the current domain name so that navigation works if third-party requests are blocked.
-                    currentWebView.resetCurrentDomainName();
+        // Convert the folder icon byte array stream to a byte array.
+        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 
-                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
-                    currentWebView.setNavigatingHistory(true);
+        // 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);
+        }
 
-                    // Load the next website in the history.
-                    currentWebView.goForward();
-                }
-                break;
+        // Create the folder, which will be placed at the top of the `ListView`.
+        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
 
-            case R.id.history:
-                // Instantiate the URL history dialog.
-                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Show the URL history dialog.
-                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
-                break;
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-            case R.id.requests:
-                // Populate the resource requests.
-                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
+        // Scroll to the new folder.
+        bookmarksListView.setSelection(0);
+    }
 
-                // Create an intent to launch the Requests activity.
-                Intent requestsIntent = new Intent(this, RequestsActivity.class);
+    @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);
 
-                // Add the block third-party requests status to the intent.
-                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+        // Store the bookmark strings.
+        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 
-                // Make it so.
-                startActivity(requestsIntent);
-                break;
+        // 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();
 
-            case R.id.downloads:
-                // Launch the system Download Manager.
-                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+            // 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);
 
-                // 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);
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 
-                startActivity(downloadManagerIntent);
-                break;
+            //  Update the bookmark and the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+        }
 
-            case R.id.domains:
-                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
-                reapplyDomainSettingsOnRestart = true;
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Launch the domains activity.
-                Intent domainsIntent = new Intent(this, DomainsActivity.class);
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-                // Add the extra information to the intent.
-                domainsIntent.putExtra("current_url", currentWebView.getUrl());
+    @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 the current certificate.
-                SslCertificate sslCertificate = currentWebView.getCertificate();
+        // Get the new folder name.
+        String newFolderNameString = editFolderNameEditText.getText().toString();
 
-                // 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 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 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);
-                }
+            // Populate the new folder icon bitmap.
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 
-                // 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());
-                }
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                // Make it so.
-                startActivity(domainsIntent);
-                break;
+                // 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;
+            }
 
-            case R.id.settings:
-                // Set the flag to reapply app settings on restart when returning from Settings.
-                reapplyAppSettingsOnRestart = true;
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Set the flag to reapply the domain settings on restart when returning from Settings.
-                reapplyDomainSettingsOnRestart = true;
+            // 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);
 
-                // Launch the settings activity.
-                Intent settingsIntent = new Intent(this, SettingsActivity.class);
-                startActivity(settingsIntent);
-                break;
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-            case R.id.import_export:
-                // Launch the import/export activity.
-                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
-                startActivity(importExportIntent);
-                break;
+            // 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();
 
-            case R.id.logcat:
-                // Launch the logcat activity.
-                Intent logcatIntent = new Intent(this, LogcatActivity.class);
-                startActivity(logcatIntent);
-                break;
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-            case R.id.guide:
-                // Launch `GuideActivity`.
-                Intent guideIntent = new Intent(this, GuideActivity.class);
-                startActivity(guideIntent);
-                break;
+                // 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;
+            }
 
-            case R.id.about:
-                // Create an intent to launch the about activity.
-                Intent aboutIntent = new Intent(this, AboutActivity.class);
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // 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]};
+            // 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);
 
-                // Add the blocklist versions to the intent.
-                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-                // Make it so.
-                startActivity(aboutIntent);
-                break;
+            // Update the folder name and icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
         }
 
-        // Get a handle for the drawer layout.
-        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-        // Close the navigation drawer.
-        drawerLayout.closeDrawer(GravityCompat.START);
-        return true;
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
     }
 
     @Override
-    public void onPostCreate(Bundle savedInstanceState) {
-        // Run the default commands.
-        super.onPostCreate(savedInstanceState);
+    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;
 
-        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
-        actionBarDrawerToggle.syncState();
+            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;
+        }
     }
 
     @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        // Run the default commands.
-        super.onConfigurationChanged(newConfig);
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        // Get a handle for the fragment manager.
+        FragmentManager fragmentManager = getSupportFragmentManager();
 
-        // Get the status bar pixel size.
-        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
-        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+        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);
 
-        // Get the resource density.
-        float screenDensity = getResources().getDisplayMetrics().density;
+                // 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));
+                }
 
-        // Recalculate the drawer header padding.
-        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
-        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
-        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
+                // Reset the download variables.
+                downloadUrl = "";
+                downloadContentDisposition = "";
+                downloadContentLength = 0;
+                break;
 
-        // 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));
-        }
+            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);
 
-        // `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);
+                // 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));
+                }
+
+                // Reset the image URL variable.
+                downloadImageUrl = "";
+                break;
+
+            case SAVE_WEBPAGE_IMAGE_REQUEST_CODE:
+                // Check to see if the storage permission was granted.  If the dialog was canceled the grant result will be empty.
+                if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) {  // The storage permission was granted.
+                    // Save the webpage image.
+                    new SaveWebpageImage(this, currentWebView).execute(saveWebsiteImageFilePath);
+                } else {  // The storage permission was not granted.
+                    // Display an error snackbar.
+                    Snackbar.make(currentWebView, getString(R.string.cannot_use_location), Snackbar.LENGTH_LONG).show();
+                }
+
+                // Reset the save website image file path.
+                saveWebsiteImageFilePath = "";
+                break;
+        }
     }
 
     @Override
-    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
-        // Store the hit test result.
-        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
+    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);
 
-        // Create the URL strings.
-        final String imageUrl;
-        final String linkUrl;
+            // Parse `imageUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
 
-        // Get handles for the system managers.
-        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
-        FragmentManager fragmentManager = getSupportFragmentManager();
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-        // Remove the lint errors below that the clipboard manager might be null.
-        assert clipboardManager != null;
+            // 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);
 
-        // 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();
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+            // Get the file name from the dialog fragment.
+            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
+            String imageName = downloadImageNameEditText.getText().toString();
 
-                // Add a Load URL entry.
-                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Add a new tab.
-                    addTab(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, imageName);
+            } else {  // External write permission denied.
+                // Download to the app's external download directory.
+                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, imageName);
+            }
 
-                    // Load the URL.
-                    loadUrl(linkUrl);
-                    return false;
-                });
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(linkUrl);
-                    return false;
-                });
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(imageUrl);
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(linkUrl);
-                    return false;
-                });
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-                // 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);
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
-                    return false;
-                });
+            // 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();
+        }
+    }
 
-                // 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;
+    @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);
 
-                            // 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);
+            // Parse `downloadUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
 
-                                // 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);
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-                            // Show the download file alert dialog.
-                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    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 a Cancel entry, which by default closes the context menu.
-                menu.add(R.string.cancel);
-                break;
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
-            case WebView.HitTestResult.EMAIL_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+            // Get the file name from the dialog fragment.
+            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
+            String fileName = downloadFileNameEditText.getText().toString();
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+            // 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);
+            }
 
-                // 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);
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-                    // Parse the url and set it as the data for the `Intent`.
-                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(downloadUrl);
 
-                    // `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);
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-                    // Make it so.
-                    startActivity(emailIntent);
-                    return false;
-                });
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-                // 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);
+            // 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();
+        }
+    }
+
+    // Override `onBackPressed` to handle the navigation drawer and and the WebViews.
+    @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);
+
+        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);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
-                    return false;
-                });
+                // Load the new folder.
+                loadBookmarksFolder();
+            }
+        } else if (displayingFullScreenVideo) {  // A full screen video is shown.
+            // Get a handle for the layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+            RelativeLayout mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
+            FrameLayout fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+            // Re-enable the screen timeout.
+            fullScreenVideoFrameLayout.setKeepScreenOn(false);
 
-            // `IMAGE_TYPE` is an image.
-            case WebView.HitTestResult.IMAGE_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+            // Unset the full screen video flag.
+            displayingFullScreenVideo = false;
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+            // Remove all the views from the full screen video frame layout.
+            fullScreenVideoFrameLayout.removeAllViews();
 
-                // Add a View Image entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+            // Hide the full screen video frame layout.
+            fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-                // 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;
+            // Enable the sliding drawers.
+            drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-                            // 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);
+            // Show the main content relative layout.
+            mainContentRelativeLayout.setVisibility(View.VISIBLE);
 
-                                // 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);
+            // Apply the appropriate full screen mode flags.
+            if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+                // Hide the app bar if specified.
+                if (hideAppBar) {
+                    // Get handles for the views.
+                    LinearLayout tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
+                    ActionBar actionBar = getSupportActionBar();
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+                    // Remove the incorrect lint warning below that the action bar might be null.
+                    assert actionBar != null;
 
-                // 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);
+                    // Hide the tab linear layout.
+                    tabsLinearLayout.setVisibility(View.GONE);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageTypeClipData);
-                    return false;
-                });
+                    // Hide the action bar.
+                    actionBar.hide();
+                }
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(imageUrl);
-                    return false;
-                });
+                // Hide the banner ad in the free flavor.
+                if (BuildConfig.FLAVOR.contentEquals("free")) {
+                    AdHelper.hideAd(findViewById(R.id.adview));
+                }
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(imageUrl);
-                    return false;
-                });
+                // 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);
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+                /* 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 {  // Switch to normal viewing mode.
+                // Remove the `SYSTEM_UI` flags from the root frame layout.
+                rootFrameLayout.setSystemUiVisibility(0);
 
+                // Add the translucent status flag.
+                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            }
 
-            // `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();
+            // Reload the ad for the free flavor if not in full screen mode.
+            if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
+                // Reload the ad.
+                AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
+            }
+        } else if (currentWebView.canGoBack()) {  // There is at least one item in the current WebView history.
+            // Get the current web back forward list.
+            WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+            // Get the previous entry URL.
+            String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
 
-                // Add a `View Image` entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+            // 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;
+            // Apply the domain settings.
+            applyDomainSettings(currentWebView, previousUrl, false, false);
 
-                            // 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);
+            // 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();
 
-                                // 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);
+            // Manually kill Privacy Browser.  Otherwise, it is glitchy when restarted.
+            System.exit(0);
+        }
+    }
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+    // Process the results of a file browse.
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        // Run the commands that correlate to the specified request code.
+        switch (requestCode) {
+            case FILE_UPLOAD_REQUEST_CODE:
+                // 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));
+                }
+                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 BROWSE_SAVE_WEBPAGE_IMAGE_REQUEST_CODE:
+                // Don't do anything if the user pressed back from the file picker.
+                if (resultCode == Activity.RESULT_OK) {
+                    // Get a handle for the save dialog fragment.
+                    DialogFragment saveWebpageImageDialogFragment= (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.save_as_image));
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
-                    return false;
-                });
+                    // Only update the file name if the dialog still exists.
+                    if (saveWebpageImageDialogFragment != null) {
+                        // Get a handle for the save webpage image dialog.
+                        Dialog saveWebpageImageDialog = saveWebpageImageDialogFragment.getDialog();
 
-                // 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 file name edit text.
+                        EditText fileNameEditText = saveWebpageImageDialog.findViewById(R.id.file_name_edittext);
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(imageUrl);
-                    return false;
-                });
+                        // Instantiate the file name helper.
+                        FileNameHelper fileNameHelper = new FileNameHelper();
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
+                        // Convert the file name URI to a file name path.
+                        String fileNamePath = fileNameHelper.convertUriToFileNamePath(data.getData());
+
+                        // Set the file name path as the text of the file name edit text.
+                        fileNameEditText.setText(fileNamePath);
+                    }
+                }
                 break;
         }
     }
 
-    @Override
-    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
-        // Get a handle for the bookmarks list view.
-        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+    private void loadUrlFromTextBox() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-        // 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);
+        // 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();
 
-        // Extract the strings from the edit texts.
-        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
+        // Initialize the formatted URL string.
+        String url = "";
 
-        // Create a favorite icon byte array output stream.
-        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+        // 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 bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-        favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
+            // Initialize `unformattedUrl`.
+            URL unformattedUrl = null;
 
-        // Convert the favorite icon byte array stream to a byte array.
-        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+            // 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();
+            }
 
-        // Display the new bookmark below the current items in the (0 indexed) list.
-        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+            // 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;
 
-        // Create the bookmark.
-        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
+            // Build the URI.
+            Uri.Builder uri = new Uri.Builder();
+            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+            // 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;
 
-        // Update the list view.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+            // Sanitize the search input.
+            try {
+                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
+
+            // 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();
+
+        // Make it so.
+        loadUrl(url);
+    }
+
+    private void loadUrl(String url) {
+        // Sanitize the URL.
+        url = sanitizeUrl(url);
+
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, true, false);
+
+        // Load the URL.
+        currentWebView.loadUrl(url, customHeaders);
+    }
+
+    public void findPreviousOnPage(View view) {
+        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
+        currentWebView.findNext(false);
+    }
 
-        // Scroll to the new bookmark.
-        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    public void findNextOnPage(View view) {
+        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
+        currentWebView.findNext(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);
+    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);
 
-        // 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);
+        // Delete the contents of `find_on_page_edittext`.
+        findOnPageEditText.setText(null);
 
-        // Get new folder name string.
-        String folderNameString = createFolderNameEditText.getText().toString();
+        // Clear the highlighted phrases if the WebView is not null.
+        if (currentWebView != null) {
+            currentWebView.clearMatches();
+        }
 
-        // Create a folder icon bitmap.
-        Bitmap folderIconBitmap;
+        // Hide the find on page linear layout.
+        findOnPageLinearLayout.setVisibility(View.GONE);
 
-        // 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();
+        // Show the toolbar.
+        toolbar.setVisibility(View.VISIBLE);
 
-            // Convert the folder icon drawable to a bitmap drawable.
-            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+        // Get a handle for the input method manager.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-            // 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;
-        }
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-        // Create a folder icon byte array output stream.
-        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
+        // Hide the keyboard.
+        inputMethodManager.hideSoftInputFromWindow(toolbar.getWindowToken(), 0);
+    }
 
-        // 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);
+    @Override
+    public void onSaveWebpageImage(DialogFragment dialogFragment) {
+        // Get a handle for the file name edit text.
+        EditText fileNameEditText = dialogFragment.getDialog().findViewById(R.id.file_name_edittext);
+
+        // Get the file path string.
+        saveWebsiteImageFilePath = fileNameEditText.getText().toString();
+
+        // Check to see if the storage permission is needed.
+        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // The storage permission has been granted.
+            // Save the webpage image.
+            new SaveWebpageImage(this, currentWebView).execute(saveWebsiteImageFilePath);
+        } else {  // The storage permission has not been granted.
+            // Get the external private directory `File`.
+            File externalPrivateDirectoryFile = getExternalFilesDir(null);
+
+            // Remove the incorrect lint error below that the file might be null.
+            assert externalPrivateDirectoryFile != null;
+
+            // Get the external private directory string.
+            String externalPrivateDirectory = externalPrivateDirectoryFile.toString();
+
+            // Check to see if the file path is in the external private directory.
+            if (saveWebsiteImageFilePath.startsWith(externalPrivateDirectory)) {  // The file path is in the external private directory.
+                // Save the webpage image.
+                new SaveWebpageImage(this, currentWebView).execute(saveWebsiteImageFilePath);
+            } else {  // The file path is in a public directory.
+                // Check if the user has previously denied the storage permission.
+                if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
+                    // Instantiate the storage permission alert dialog.
+                    DialogFragment storagePermissionDialogFragment = new StoragePermissionDialog();
+
+                    // Show the storage permission alert dialog.  The permission will be requested when the dialog is closed.
+                    storagePermissionDialogFragment.show(getSupportFragmentManager(), getString(R.string.storage_permission));
+                } else {  // Show the permission request directly.
+                    // Request the write external storage permission.  The webpage image will be saved when it finishes.
+                    ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, SAVE_WEBPAGE_IMAGE_REQUEST_CODE);
+                }
+            }
+        }
+    }
 
-        // Convert the folder icon byte array stream to a byte array.
-        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+    @Override
+    public void onCloseStoragePermissionDialog() {
+        // Request the write external storage permission.  The webpage image will be saved when it finishes.
+        ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, SAVE_WEBPAGE_IMAGE_REQUEST_CODE);
+    }
 
-        // 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);
+    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();
         }
 
-        // Create the folder, which will be placed at the top of the `ListView`.
-        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
-
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+        // 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);
 
-        // Scroll to the new folder.
-        bookmarksListView.setSelection(0);
-    }
+        // 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);
 
-    @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);
+        // Remove the incorrect lint warning below that the action bar might be null.
+        assert actionBar != null;
 
-        // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+        // Apply the proxy through Orbot settings.
+        applyProxyThroughOrbot(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();
+        // Set Do Not Track status.
+        if (doNotTrackEnabled) {
+            customHeaders.put("DNT", "1");
+        } else {
+            customHeaders.remove("DNT");
+        }
 
-            // 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);
+        // 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();
 
-            // Convert the favorite icon byte array stream to a byte array.
-            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
+        // 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);
 
-            //  Update the bookmark and the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+            // Expand the app bar if it is currently collapsed.
+            appBarLayout.setExpanded(true);
         }
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+        // Apply the modified layout parameters.
+        swipeRefreshLayout.setLayoutParams(swipeRefreshLayoutParams);
+        toolbar.setLayoutParams(toolbarLayoutParams);
+        findOnPageLinearLayout.setLayoutParams(findOnPageLayoutParams);
+        tabsLinearLayout.setLayoutParams(tabsLayoutParams);
 
-        // Update the list view.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // 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);
 
-    @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 the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // Get the new folder name.
-        String newFolderNameString = editFolderNameEditText.getText().toString();
+            // 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);
 
-        // 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;
+                // Set the app bar scrolling.
+                nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
+            }
+        }
 
-            // Populate the new folder icon bitmap.
-            if (defaultFolderIconRadioButton.isChecked()) {
-                // Get the default folder icon drawable.
-                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
+        // 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);
 
-                // Convert the folder icon drawable to a bitmap drawable.
-                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+                // Hide the action bar.
+                actionBar.hide();
+            } else {
+                // Show the tab linear layout.
+                tabsLinearLayout.setVisibility(View.VISIBLE);
 
-                // 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;
+                // Show the action bar.
+                actionBar.show();
             }
 
-            // Create a folder icon byte array output stream.
-            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+            // Hide the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                AdHelper.hideAd(findViewById(R.id.adview));
+            }
 
-            // 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 translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-            // Convert the folder icon byte array stream to a byte array.
-            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+            /* 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;
 
-            // 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();
+            // Show the tab linear layout.
+            tabsLinearLayout.setVisibility(View.VISIBLE);
 
-                // Convert the folder icon drawable to a bitmap drawable.
-                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+            // Show the action bar.
+            actionBar.show();
 
-                // 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;
+            // 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));
             }
 
-            // Create a folder icon byte array output stream.
-            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
-
-            // 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);
-
-            // Convert the folder icon byte array stream to a byte array.
-            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+            // Remove the `SYSTEM_UI` flags from the root frame layout.
+            rootFrameLayout.setSystemUiVisibility(0);
 
-            // Update the folder name and icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+            // Add the translucent status flag.
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
         }
+    }
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+    private void initializeApp() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // Get the theme preference.
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", 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;
+        // Get a handle for the input method.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-            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;
-        }
-    }
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-        // Get a handle for the fragment manager.
-        FragmentManager fragmentManager = getSupportFragmentManager();
+        // 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));
 
-        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);
+        // Get handles for the URL views.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-                // 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));
-                }
+        // 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);
 
-                // Reset the download variables.
-                downloadUrl = "";
-                downloadContentDisposition = "";
-                downloadContentLength = 0;
-                break;
+                // Reapply the highlighting.
+                highlightUrlText();
+            }
+        });
 
-            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);
+        // 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();
 
-                // 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));
-                }
+                // 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;
+            }
+        });
 
-                // Reset the image URL variable.
-                downloadImageUrl = "";
-                break;
-        }
-    }
+        // Initialize the Orbot status and the waiting for Orbot trackers.
+        orbotStatus = "unknown";
+        waitingForOrbot = false;
 
-    @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);
+        // 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");
 
-            // Parse `imageUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
+                // 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;
 
-            // Get a handle for the cookie manager.
-            CookieManager cookieManager = CookieManager.getInstance();
+                    // Get the intent that started the app.
+                    Intent launchingIntent = getIntent();
 
-            // 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);
+                    // Get the information from the intent.
+                    String launchingIntentAction = launchingIntent.getAction();
+                    Uri launchingIntentUriData = launchingIntent.getData();
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
-            }
+                    // 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;
 
-            // Get the file name from the dialog fragment.
-            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
-            String imageName = downloadImageNameEditText.getText().toString();
+                        // Sanitize the search input and convert it to a search.
+                        try {
+                            encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                        } catch (UnsupportedEncodingException exception) {
+                            encodedUrlString = "";
+                        }
 
-            // 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);
+                        // 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)));
+                        }
+                    }
+                }
             }
+        };
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+        // Register `orbotStatusBroadcastReceiver` on `this` context.
+        this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(imageUrl);
+        // 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);
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+        // Listen for touches on the navigation menu.
+        navigationView.setNavigationItemSelectedListener(this);
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+        // 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);
 
-            // 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();
-        }
-    }
+        // 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.
+            }
 
-    @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);
+            @Override
+            public void onPageSelected(int position) {
+                // Close the find on page bar if it is open.
+                closeFindOnPage(null);
 
-            // Parse `downloadUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
+                // Set the current WebView.
+                setCurrentWebView(position);
 
-            // Get a handle for the cookie manager.
-            CookieManager cookieManager = CookieManager.getInstance();
+                // 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();
 
-            // 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);
+                    // Create a runnable to select the tab.
+                    Runnable selectTabRunnable = () -> {
+                        // Get a handle for the tab.
+                        TabLayout.Tab tab = tabLayout.getTabAt(position);
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
-            }
+                        // Assert that the tab is not null.
+                        assert tab != null;
 
-            // Get the file name from the dialog fragment.
-            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
-            String fileName = downloadFileNameEditText.getText().toString();
+                        // Select the tab.
+                        tab.select();
+                    };
+
+                    // Select the tab layout after 150 milliseconds, which leaves enough time for a new tab to be inflated.
+                    selectTabHandler.postDelayed(selectTabRunnable, 150);
+                }
+            }
 
-            // 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);
+            @Override
+            public void onPageScrollStateChanged(int state) {
+                // Do nothing.
             }
+        });
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+        // 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());
+            }
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(downloadUrl);
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {
+                // Do nothing.
+            }
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {
+                // Instantiate the View SSL Certificate dialog.
+                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId());
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+                // Display the View SSL Certificate dialog.
+                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
+            }
+        });
 
-            // 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();
+        // 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));
         }
-    }
-
-    // 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);
 
-        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);
+        // 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();
 
-                // 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();
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-            // Set navigating history so that the domain settings are applied when the new URL is loaded.
-            currentWebView.setNavigatingHistory(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, favoriteIconByteArrayOutputStream);
 
-            // 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();
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-            // Manually kill Privacy Browser.  Otherwise, it is glitchy when restarted.
-            System.exit(0);
-        }
-    }
+            // Create an intent to launch the bookmarks activity.
+            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
 
-    // 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));
-        }
-    }
+            // 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);
 
-    private void loadUrlFromTextBox() {
-        // Get a handle for the URL edit text.
-        EditText urlEditText = findViewById(R.id.url_edittext);
+            // Make it so.
+            startActivity(bookmarksIntent);
+        });
 
-        // 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();
+        // 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());
 
-        // Initialize the formatted URL string.
-        String url = "";
+            // Show the create bookmark folder dialog.
+            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
+        });
 
-        // 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;
-            }
+        // 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());
 
-            // Initialize `unformattedUrl`.
-            URL unformattedUrl = null;
+            // Display the create bookmark dialog.
+            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
+        });
 
-            // 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();
+        // 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.
             }
 
-            // 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;
-
-            // Build the URI.
-            Uri.Builder uri = new Uri.Builder();
-            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                // Do nothing.
+            }
 
-            // 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.
+            @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());
+                }
             }
-        } else if (!unformattedUrlString.isEmpty()){  // This is not a URL, but rather a search string.
-            // Create an encoded URL String.
-            String encodedUrlString;
+        });
 
-            // Sanitize the search input.
-            try {
-                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
+        // 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);
+
+                // Consume the event.
+                return true;
+            } else {  // A different key was pressed.
+                // Do not consume the event.
+                return false;
             }
+        });
 
-            // Add the base search URL.
-            url = searchURL + encodedUrlString;
-        }
+        // Implement swipe to refresh.
+        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
 
-        // 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();
+        // Store the default progress view offsets for use later in `initializeWebView()`.
+        defaultProgressViewStartOffset = swipeRefreshLayout.getProgressViewStartOffset();
+        defaultProgressViewEndOffset = swipeRefreshLayout.getProgressViewEndOffset();
 
-        // Make it so.
-        loadUrl(url);
-    }
+        // 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);
+        }
 
-    private void loadUrl(String url) {
-        // Apply the domain settings.
-        applyDomainSettings(currentWebView, url, true, false);
+        // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
+        drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
+        drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
 
-        // Load the URL.
-        currentWebView.loadUrl(url, customHeaders);
-    }
+        // 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);
 
-    public void findPreviousOnPage(View view) {
-        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
-        currentWebView.findNext(false);
-    }
+        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
+        currentBookmarksFolder = "";
 
-    public void findNextOnPage(View view) {
-        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
-        currentWebView.findNext(true);
-    }
+        // Load the home folder, which is `""` in the database.
+        loadBookmarksFolder();
 
-    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);
+        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;
 
-        // Delete the contents of `find_on_page_edittext`.
-        findOnPageEditText.setText(null);
+            // Get the bookmark cursor for this ID and move it to the first row.
+            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
+            bookmarkCursor.moveToFirst();
 
-        // Clear the highlighted phrases if the WebView is not null.
-        if (currentWebView != null) {
-            currentWebView.clearMatches();
-        }
+            // 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));
 
-        // Hide the find on page linear layout.
-        findOnPageLinearLayout.setVisibility(View.GONE);
+                // 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)));
 
-        // Show the toolbar.
-        toolbar.setVisibility(View.VISIBLE);
+                // Close the bookmarks drawer.
+                drawerLayout.closeDrawer(GravityCompat.END);
+            }
 
-        // Get a handle for the input method manager.
-        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+            // Close the `Cursor`.
+            bookmarkCursor.close();
+        });
 
-        // Remove the lint warning below that the input method manager might be null.
-        assert inputMethodManager != null;
+        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
+            // Convert the database ID from `long` to `int`.
+            int databaseId = (int) id;
 
-        // Hide the keyboard.
-        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
-    }
+            // Find out if the selected bookmark is a folder.
+            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
 
-    private void applyAppSettings() {
-        // Get a handle for 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));
 
-        // 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);
-        scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
+                // 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 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);
+            // Consume the event.
+            return true;
+        });
 
-        // Remove the incorrect lint warning below that the action bar might be null.
-        assert actionBar != null;
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-        // Apply the proxy through Orbot settings.
-        applyProxyThroughOrbot(false);
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
+        // 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);
 
-        // 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();
+        // The drawer listener is used to update the navigation menu.`
+        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
+            @Override
+            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
+            }
 
-        // 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);
+            @Override
+            public void onDrawerOpened(@NonNull View drawerView) {
+            }
 
-            // Expand the app bar if it is currently collapsed.
-            appBarLayout.setExpanded(true);
-        }
+            @Override
+            public void onDrawerClosed(@NonNull View drawerView) {
+            }
 
-        // Apply the modified layout parameters.
-        swipeRefreshLayout.setLayoutParams(swipeRefreshLayoutParams);
-        toolbar.setLayoutParams(toolbarLayoutParams);
-        findOnPageLinearLayout.setLayoutParams(findOnPageLayoutParams);
-        tabsLinearLayout.setLayoutParams(tabsLayoutParams);
+            @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);
 
-        // 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);
+                    // 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 fragment view.
-            View fragmentView = webViewTabFragment.getView();
+                    // 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);
+                    }
 
-            // 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 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));
 
-                // Set the app bar scrolling.
-                nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
+                        // 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();
+                }
             }
-        }
+        });
 
-        // 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);
+        // 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", "");
 
-                // Hide the action bar.
-                actionBar.hide();
-            } else {
-                // Show the tab linear layout.
-                tabsLinearLayout.setVisibility(View.VISIBLE);
+        // 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);
 
-                // Show the action bar.
-                actionBar.show();
-            }
+        // Get a handle for the WebView.
+        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
 
-            // Hide the banner ad in the free flavor.
-            if (BuildConfig.FLAVOR.contentEquals("free")) {
-                AdHelper.hideAd(findViewById(R.id.adview));
-            }
+        // Store the default user agent.
+        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
 
-            // 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);
+        // Destroy the bare WebView.
+        bareWebView.destroy();
+    }
 
-            /* 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;
+    @Override
+    public void navigateHistory(String url, int steps) {
+        // Reset the current domain name so that navigation works if third-party requests are blocked.
+        currentWebView.resetCurrentDomainName();
 
-            // Show the tab linear layout.
-            tabsLinearLayout.setVisibility(View.VISIBLE);
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, false, false);
 
-            // Show the action bar.
-            actionBar.show();
+        // Load the history entry.
+        currentWebView.goBackOrForward(steps);
+    }
 
-            // 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));
-            }
+    @Override
+    public void pinnedErrorGoBack() {
+        // Get the current web back forward list.
+        WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-            // Remove the `SYSTEM_UI` flags from the root frame layout.
-            rootFrameLayout.setSystemUiVisibility(0);
+        // Get the previous entry URL.
+        String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
 
-            // Add the translucent status flag.
-            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-        }
-    }
+        // Reset the current domain name so that navigation works if third-party requests are blocked.
+        currentWebView.resetCurrentDomainName();
+
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, previousUrl, false, false);
 
+        // Go back.
+        currentWebView.goBack();
+    }
 
     // `reloadWebsite` is used if returning from the Domains activity.  Otherwise JavaScript might not function correctly if it is newly enabled.
     @SuppressLint("SetJavaScriptEnabled")
@@ -3437,6 +3721,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Store a copy of the current user agent to track changes for the return boolean.
         String initialUserAgent = nestedScrollWebView.getSettings().getUserAgentString();
 
+        // Store the current URL.
+        nestedScrollWebView.setCurrentUrl(url);
+
         // Parse the URL into a URI.
         Uri uri = Uri.parse(url);
 
@@ -3448,8 +3735,8 @@ 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);
 
@@ -3555,8 +3842,9 @@ 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();
@@ -3582,15 +3870,16 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 nestedScrollWebView.getSettings().setDomStorageEnabled(currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
                 // Form data can be removed once the minimum API >= 26.
                 boolean saveFormData = (currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_LIST,
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYLIST,
                         currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYLIST)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY,
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY,
                         currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_EASYPRIVACY)) == 1);
                 nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST,
                         currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_ANNOYANCE_LIST)) == 1);
                 nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST,
                         currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FANBOYS_SOCIAL_BLOCKING_LIST)) == 1);
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY,
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ULTRALIST)) == 1);
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY,
                         currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_ULTRAPRIVACY)) == 1);
                 nestedScrollWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS,
                         currentDomainSettingsCursor.getInt(currentDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.BLOCK_ALL_THIRD_PARTY_REQUESTS)) == 1);
@@ -3598,6 +3887,7 @@ 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));
@@ -3640,17 +3930,17 @@ 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;
@@ -3681,66 +3971,62 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     nestedScrollWebView.getSettings().setSaveFormData(saveFormData);
                 }
 
-                // Apply the font size.
-                if (fontSize == 0) {  // Apply the default font size.
-                    nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
-                } else {  // Apply the specified font size.
-                    nestedScrollWebView.getSettings().setTextZoom(fontSize);
-                }
+                // Apply the font size.
+                if (fontSize == 0) {  // Apply the default font size.
+                    nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+                } else {  // Apply the specified font size.
+                    nestedScrollWebView.getSettings().setTextZoom(fontSize);
+                }
+
+                // 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;
 
-                // 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]);
-                        }
+                        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);
 
@@ -3748,7 +4034,7 @@ 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);
 
@@ -3756,7 +4042,7 @@ 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);
 
@@ -3764,17 +4050,32 @@ 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;
                 }
@@ -3792,11 +4093,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 boolean defaultThirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies", false);
                 nestedScrollWebView.getSettings().setDomStorageEnabled(sharedPreferences.getBoolean("dom_storage", false));
                 boolean saveFormData = sharedPreferences.getBoolean("save_form_data", false);  // Form data can be removed once the minimum API >= 26.
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_LIST, sharedPreferences.getBoolean("easylist", true));
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, sharedPreferences.getBoolean("easyprivacy", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYLIST, sharedPreferences.getBoolean("easylist", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, sharedPreferences.getBoolean("easyprivacy", true));
                 nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, sharedPreferences.getBoolean("fanboys_annoyance_list", true));
                 nestedScrollWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, sharedPreferences.getBoolean("fanboys_social_blocking_list", true));
-                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY, sharedPreferences.getBoolean("ultraprivacy", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, sharedPreferences.getBoolean("ultralist", true));
+                nestedScrollWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, sharedPreferences.getBoolean("ultraprivacy", true));
                 nestedScrollWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, sharedPreferences.getBoolean("block_all_third_party_requests", false));
                 nestedScrollWebView.setNightMode(sharedPreferences.getBoolean("night_mode", false));
 
@@ -3832,35 +4134,34 @@ 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);
 
@@ -4186,8 +4487,13 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Flag the intent to open in a new task.
         openWithAppIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Show the chooser.
-        startActivity(openWithAppIntent);
+        try {
+            // Show the chooser.
+            startActivity(openWithAppIntent);
+        } catch (ActivityNotFoundException exception) {
+            // Show a snackbar with the error.
+            Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
+        }
     }
 
     private void openWithBrowser(String url) {
@@ -4200,11 +4506,86 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Flag the intent to open in a new task.
         openWithBrowserIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Show the chooser.
-        startActivity(openWithBrowserIntent);
+        try {
+            // Show the chooser.
+            startActivity(openWithBrowserIntent);
+        } catch (ActivityNotFoundException exception) {
+            // Show a snackbar with the error.
+            Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
+        }
+    }
+
+    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="));
+            }
+
+            // Remove `?fbadid=`.
+            if (url.contains("?fbadid=")) {
+                url = url.substring(0, url.indexOf("?fbadid="));
+            }
+
+            // Remove `&fbadid=`.
+            if (url.contains("&fbadid=")) {
+                url = url.substring(0, url.indexOf("&fbadid="));
+            }
+        }
+
+        // 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);
+        ultraList = combinedBlocklists.get(4);
+        ultraPrivacy = combinedBlocklists.get(5);
+
+        // Add the first tab.
+        addNewTab("", true);
     }
 
     public void addTab(View view) {
+        // Add a new tab with a blank URL.
+        addNewTab("", true);
+    }
+
+    private void addNewTab(String url, boolean moveToTab) {
+        // 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);
@@ -4225,7 +4606,20 @@ 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, moveToTab);
+    }
+
+    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() {
@@ -4249,6 +4643,183 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         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) {
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
@@ -4261,7 +4832,7 @@ 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.
@@ -4271,19 +4842,14 @@ 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);
@@ -4347,11 +4913,23 @@ 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);
@@ -4372,7 +4950,7 @@ 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;
@@ -4380,9 +4958,6 @@ 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();
 
@@ -4400,9 +4975,6 @@ 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);
 
@@ -4504,14 +5076,14 @@ 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);
@@ -4524,7 +5096,7 @@ 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;
 
@@ -4541,7 +5113,7 @@ 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));
@@ -4572,13 +5144,26 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             }
         });
 
-        // Update the status of swipe to refresh based on the scroll position of the nested scroll WebView.
+        // Update the status of swipe to refresh based on the scroll position of the nested scroll WebView.  Also reinforce full screen browsing mode.
         // 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);
             }
+
+            // Reinforce the system UI visibility flags if in full screen browsing mode.
+            // This hides the status and navigation bars, which are displayed if other elements are shown, like dialog boxes, the options menu, or the keyboard.
+            if (inFullScreenBrowsingMode) {
+                /* 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);
+            }
         });
 
         // Set the web chrome client.
@@ -4683,8 +5268,14 @@ 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);
+                    }
                 }
             }
 
@@ -4732,6 +5323,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Show the full screen video frame layout.
                 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
+
+                // Disable the screen timeout while the video is playing.  YouTube does this automatically, but not all other videos do.
+                fullScreenVideoFrameLayout.setKeepScreenOn(true);
             }
 
             // Exit full screen video.
@@ -4740,6 +5334,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Get a handle for the full screen video frame layout.
                 FrameLayout fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
 
+                // Re-enable the screen timeout.
+                fullScreenVideoFrameLayout.setKeepScreenOn(false);
+
                 // Unset the full screen video flag.
                 displayingFullScreenVideo = false;
 
@@ -4808,8 +5405,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Create an intent to open a chooser based ont the file chooser parameters.
                     Intent fileChooserIntent = fileChooserParams.createIntent();
 
-                    // Open the file chooser.  Currently only one `startActivityForResult` exists in this activity, so the request code, used to differentiate them, is simply `0`.
-                    startActivityForResult(fileChooserIntent, 0);
+                    // Open the file chooser.
+                    startActivityForResult(fileChooserIntent, FILE_UPLOAD_REQUEST_CODE);
                 }
                 return true;
             }
@@ -4820,6 +5417,9 @@ 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);
@@ -4893,6 +5493,28 @@ 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) {
+                // Check to see if the resource request is for the main URL.
+                if (url.equals(nestedScrollWebView.getCurrentUrl())) {
+                    // `return null` loads the resource request, which should never be blocked if it is the main URL.
+                    return null;
+                }
+
+                // Wait until the blocklists have been populated.  When Privacy Browser is being resumed after having the process killed in the background it will try to load the URLs immediately.
+                while (ultraPrivacy == null) {
+                    // The wait must be synchronized, which only lets one thread run on it at a time, or `java.lang.IllegalMonitorStateException` is thrown.
+                    synchronized (this) {
+                        try {
+                            // Check to see if the blocklists have been populated after 100 ms.
+                            wait(100);
+                        } catch (InterruptedException exception) {
+                            // Do nothing.
+                        }
+                    }
+                }
+
+                // Sanitize the URL.
+                url = sanitizeUrl(url);
+
                 // Get a handle for the navigation view.
                 NavigationView navigationView = findViewById(R.id.navigationview);
 
@@ -4900,7 +5522,7 @@ 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()));
@@ -4953,7 +5575,7 @@ 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);
@@ -4979,20 +5601,60 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     return emptyWebResourceResponse;
                 }
 
+                // Check UltraList if it is enabled.
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST)) {
+                    // Check the URL against UltraList.
+                    String[] ultraListResults = blocklistHelper.checkBlocklist(currentDomain, url, isThirdPartyRequest, ultraList);
+
+                    // Process the UltraList results.
+                    if (ultraListResults[0].equals(BlocklistHelper.REQUEST_BLOCKED)) {  // The resource request matched UltraLists's blacklist.
+                        // Add the result to the resource requests.
+                        nestedScrollWebView.addResourceRequest(new String[] {ultraListResults[0], ultraListResults[1], ultraListResults[2], ultraListResults[3], ultraListResults[4], ultraListResults[5]});
+
+                        // Increment the blocked requests counters.
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.ULTRALIST);
+
+                        // Update the titles of the blocklist menu items if the WebView is currently displayed.
+                        if (webViewDisplayed) {
+                            // Updating the UI must be run from the UI thread.
+                            activity.runOnUiThread(() -> {
+                                // Update the menu item titles.
+                                navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+
+                                // Update the options menu if it has been populated.
+                                if (optionsMenu != null) {
+                                    optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+                                    optionsMenu.findItem(R.id.ultralist).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.ULTRALIST) + " - " + getString(R.string.ultralist));
+                                }
+                            });
+                        }
+
+                        // The resource request was blocked.  Return an empty web resource response.
+                        return emptyWebResourceResponse;
+                    } else if (ultraListResults[0].equals(BlocklistHelper.REQUEST_ALLOWED)) {  // The resource request matched UltraList's whitelist.
+                        // Add a whitelist entry to the resource requests array.
+                        nestedScrollWebView.addResourceRequest(new String[] {ultraListResults[0], ultraListResults[1], ultraListResults[2], ultraListResults[3], ultraListResults[4], ultraListResults[5]});
+
+                        // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
+                        return null;
+                    }
+                }
+
                 // Check UltraPrivacy if it is enabled.
-                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY)) {
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY)) {
                     // 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]});
 
                         // Increment the blocked requests counters.
                         nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
-                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.ULTRA_PRIVACY);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.ULTRAPRIVACY);
 
                         // Update the titles of the blocklist menu items if the WebView is currently displayed.
                         if (webViewDisplayed) {
@@ -5004,14 +5666,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                                 // Update the options menu if it has been populated.
                                 if (optionsMenu != null) {
                                     optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                    optionsMenu.findItem(R.id.ultraprivacy).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.ULTRA_PRIVACY) + " - " + getString(R.string.ultraprivacy));
+                                    optionsMenu.findItem(R.id.ultraprivacy).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + getString(R.string.ultraprivacy));
                                 }
                             });
                         }
 
                         // 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]});
@@ -5022,18 +5684,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 }
 
                 // Check EasyList if it is enabled.
-                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST)) {
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST)) {
                     // 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]});
 
                         // Increment the blocked requests counters.
                         nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
-                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASY_LIST);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASYLIST);
 
                         // Update the titles of the blocklist menu items if the WebView is currently displayed.
                         if (webViewDisplayed) {
@@ -5045,33 +5707,33 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                                 // Update the options menu if it has been populated.
                                 if (optionsMenu != null) {
                                     optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                    optionsMenu.findItem(R.id.easylist).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_LIST) + " - " + getString(R.string.easylist));
+                                    optionsMenu.findItem(R.id.easylist).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASYLIST) + " - " + getString(R.string.easylist));
                                 }
                             });
                         }
 
                         // 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]};
                     }
                 }
 
                 // Check EasyPrivacy if it is enabled.
-                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY)) {
+                if (nestedScrollWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY)) {
                     // 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]});
 
                         // Increment the blocked requests counters.
                         nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS);
-                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASY_PRIVACY);
+                        nestedScrollWebView.incrementRequestsCount(NestedScrollWebView.EASYPRIVACY);
 
                         // Update the titles of the blocklist menu items if the WebView is currently displayed.
                         if (webViewDisplayed) {
@@ -5083,14 +5745,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                                 // Update the options menu if it has been populated.
                                 if (optionsMenu != null) {
                                     optionsMenu.findItem(R.id.blocklists).setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                    optionsMenu.findItem(R.id.easyprivacy).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_PRIVACY) + " - " + getString(R.string.easyprivacy));
+                                    optionsMenu.findItem(R.id.easyprivacy).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASYPRIVACY) + " - " + getString(R.string.easyprivacy));
                                 }
                             });
                         }
 
                         // 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]};
                     }
@@ -5099,10 +5761,10 @@ 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]});
@@ -5129,17 +5791,17 @@ 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]});
@@ -5166,7 +5828,7 @@ 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]};
@@ -5177,7 +5839,7 @@ 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.
@@ -5266,21 +5928,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Get the IP addresses for the host.
                     new GetHostIpAddresses(activity, getSupportFragmentManager(), nestedScrollWebView).execute(currentUri.getHost());
 
-                    // Apply any custom domain settings if the URL was loaded by navigating history.
-                    if (nestedScrollWebView.getNavigatingHistory()) {
-                        // Reset navigating history.
-                        nestedScrollWebView.setNavigatingHistory(false);
-
-                        // Apply the domain settings.
-                        boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
-
-                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
-                        if (userAgentChanged) {
-                            loadUrl(url);
-                        }
-                    }
-
-                    // 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);
@@ -5305,12 +5953,6 @@ 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();
@@ -5377,6 +6019,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // 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.
@@ -5392,36 +6037,51 @@ 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.
-                            // 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);
+                            // Update the URL edit text if it is not currently being edited.
+                            if (!urlEditText.hasFocus()) {
+                                // Sanitize the current URL.  This removes unwanted URL elements that were added by redirects, so that they won't be included if the URL is shared.
+                                String sanitizedUrl = sanitizeUrl(currentUrl);
 
-                            // Apply text highlighting to the URL.
-                            highlightUrlText();
-                        }
-                    }
+                                // 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(sanitizedUrl);
 
-                    // Get the current tab.
-                    TabLayout.Tab tab = tabLayout.getTabAt(currentPagePosition);
+                                // 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();
+                            // 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;
+                                // 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);
+                                // 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());
+                                // Set the title as the tab text.  Sometimes `onReceivedTitle()` is not called, especially when navigating history.
+                                tabTitleTextView.setText(nestedScrollWebView.getTitle());
+                            }
+                        }
                     }
                 }
             }
@@ -5518,6 +6178,30 @@ 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);
+            }
         }
     }
 }
\ No newline at end of file