]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
Always reload tabs after changing the proxy. https://redmine.stoutner.com/issues/516
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index 5764b9d939f4b3e8b480fa6dbb36d60c1a5d7afb..1904673b5ff6543a0617772e62d03cc9ac828eba 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;
@@ -124,17 +129,25 @@ import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
 import com.stoutner.privacybrowser.dialogs.DownloadLocationPermissionDialog;
 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
+import com.stoutner.privacybrowser.dialogs.FontSizeDialog;
 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
+import com.stoutner.privacybrowser.dialogs.OpenDialog;
+import com.stoutner.privacybrowser.dialogs.ProxyNotInstalledDialog;
+import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
+import com.stoutner.privacybrowser.dialogs.SaveWebpageDialog;
 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.dialogs.WaitingForProxyDialog;
 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.OrbotProxyHelper;
+import com.stoutner.privacybrowser.helpers.FileNameHelper;
+import com.stoutner.privacybrowser.helpers.ProxyHelper;
 import com.stoutner.privacybrowser.views.NestedScrollWebView;
 
 import java.io.ByteArrayInputStream;
@@ -152,15 +165,18 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 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, FontSizeDialog.UpdateFontSizeListener, NavigationView.OnNavigationItemSelectedListener, OpenDialog.OpenListener,
+        PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveWebpageDialog.SaveWebpageListener, 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;
+    // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxy()`.
+    public static String orbotStatus = "unknown";
 
     // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
     public static WebViewPagerAdapter webViewPagerAdapter;
@@ -184,33 +200,47 @@ 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.  The public static entries are accessed from `OpenDialog()` and `SaveWebpageDialog()`.
+    public static final int BROWSE_OPEN_REQUEST_CODE = 0;
+    public static final int BROWSE_SAVE_WEBPAGE_REQUEST_CODE = 1;
+    private final int BROWSE_FILE_UPLOAD_REQUEST_CODE = 2;
 
 
+    // The permission result request codes are used in `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, `onRequestPermissionResult()`, `onSaveWebpage()`,
+    // `onCloseStoragePermissionDialog()`, and `initializeWebView()`.
+    private final int PERMISSION_DOWNLOAD_FILE_REQUEST_CODE = 0;
+    private final int PERMISSION_DOWNLOAD_IMAGE_REQUEST_CODE = 1;
+    private final int PERMISSION_OPEN_REQUEST_CODE = 2;
+    private final int PERMISSION_SAVE_WEBPAGE_ARCHIVE_REQUEST_CODE = 3;
+    private final int PERMISSION_SAVE_WEBPAGE_IMAGE_REQUEST_CODE = 4;
+
     // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
-    // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxyThroughOrbot()`, and `applyDomainSettings()`.
+    // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxy()`, and `applyDomainSettings()`.
     private NestedScrollWebView currentWebView;
 
     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
     private final Map<String, String> customHeaders = new HashMap<>();
 
-    // The search URL is set in `applyProxyThroughOrbot()` and used in `onCreate()`, `onNewIntent()`, `loadURLFromTextBox()`, and `initializeWebView()`.
+    // The search URL is set in `applyAppSettings()` and used in `onNewIntent()`, `loadUrlFromTextBox()`, `initializeApp()`, and `initializeWebView()`.
     private String searchURL;
 
     // 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()`.
     private String webViewDefaultUserAgent;
 
-    // `proxyThroughOrbot` is used in `onRestart()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxyThroughOrbot()`.
-    private boolean proxyThroughOrbot;
+    // The proxy mode is used in `onRestart()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxy()`.
+    // It will be updated in `applyAppSettings()`, but it needs to be initialized here or the first run of `onPrepareOptionsMenu()` crashes.
+    private String proxyMode = ProxyHelper.NONE;
 
     // The incognito mode is set in `applyAppSettings()` and used in `initializeWebView()`.
     private boolean incognitoModeEnabled;
@@ -240,8 +270,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
     private BroadcastReceiver orbotStatusBroadcastReceiver;
 
-    // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
-    private boolean waitingForOrbot;
+    // The waiting for proxy boolean is used in `onResume()`, `initializeApp()` and `applyProxy()`.
+    private boolean waitingForProxy = false;
 
     // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
     private ActionBarDrawerToggle actionBarDrawerToggle;
@@ -279,6 +309,11 @@ 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 +322,21 @@ 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()`.
-    private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
-    private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
+    // The file path strings are used in `onSaveWebpageImage()` and `onRequestPermissionResult()`
+    private String openFilePath;
+    private String saveWebpageFilePath;
 
     @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 +362,10 @@ 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);
@@ -342,2858 +380,3630 @@ 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));
+        // Initially disable the sliding drawers.  They will be enabled once the blocklists are loaded.
+        drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 
-        // Get handles for the URL views.
-        EditText urlEditText = findViewById(R.id.url_edittext);
+        // 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);
 
-        // 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);
+        // Initialize the web view pager adapter.
+        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
 
-                // Reapply the highlighting.
-                highlightUrlText();
-            }
-        });
+        // Set the pager adapter on the web view pager.
+        webViewPager.setAdapter(webViewPagerAdapter);
 
-        // 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();
+        // Store up to 100 tabs in memory.
+        webViewPager.setOffscreenPageLimit(100);
 
-                // 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;
-            }
-        });
+        // Populate the blocklists.
+        new PopulateBlocklists(this, this).execute();
+    }
 
-        // Initialize the Orbot status and the waiting for Orbot trackers.
-        orbotStatus = "unknown";
-        waitingForOrbot = false;
+    @Override
+    protected void onNewIntent(Intent intent) {
+        // Run the default commands.
+        super.onNewIntent(intent);
 
-        // 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");
+        // 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 = "";
                     }
-                }
-            }
-        };
 
-        // Register `orbotStatusBroadcastReceiver` on `this` context.
-        this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
-
-        // Instantiate the blocklist helper.
-        BlockListHelper blockListHelper = new BlockListHelper();
-
-        // 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");
+                    // 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();
+                }
 
-        // 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);
+                // 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;
 
-        // Listen for touches on the navigation menu.
-        navigationView.setNavigationItemSelectedListener(this);
+                    // Add a new tab.
+                    addNewTab(url, true);
+                } else {  // Load the URL in the current tab.
+                    // Make it so.
+                    loadUrl(currentWebView, url);
+                }
 
-        // 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);
+                // Get a handle for the drawer layout.
+                DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-        // Initialize the web view pager adapter.
-        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
+                // Close the navigation drawer if it is open.
+                if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
+                    drawerLayout.closeDrawer(GravityCompat.START);
+                }
 
-        // Set the pager adapter on the web view pager.
-        webViewPager.setAdapter(webViewPagerAdapter);
+                // Close the bookmarks drawer if it is open.
+                if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
+                    drawerLayout.closeDrawer(GravityCompat.END);
+                }
+            }
+        }
+    }
 
-        // Store up to 100 tabs in memory.
-        webViewPager.setOffscreenPageLimit(100);
+    @Override
+    public void onRestart() {
+        // Run the default commands.
+        super.onRestart();
 
-        // 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.
-            }
-        });
-
-        // Display the View SSL Certificate dialog when the currently selected tab is reselected.
-        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
-            @Override
-            public void onTabSelected(TabLayout.Tab tab) {
-                // Select the same page in the view pager.
-                webViewPager.setCurrentItem(tab.getPosition());
-            }
+        // Load the URL on restart (used when loading a bookmark).
+        if (loadUrlOnRestart) {
+            // Load the specified URL.
+            loadUrl(currentWebView, urlToLoadOnRestart);
 
-            @Override
-            public void onTabUnselected(TabLayout.Tab tab) {
-                // Do nothing.
-            }
+            // Reset the load on restart tracker.
+            loadUrlOnRestart = false;
+        }
 
-            @Override
-            public void onTabReselected(TabLayout.Tab tab) {
-                // Instantiate the View SSL Certificate dialog.
-                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId());
+        // 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);
 
-                // Display the View SSL Certificate dialog.
-                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
-            }
-        });
+            // Close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
 
-        // Add the first tab.
-        addTab(null);
+            // Reload the bookmarks drawer.
+            loadBookmarksFolder();
 
-        // Set the bookmarks drawer resources according to the theme.  This can't be done in the layout due to compatibility issues with the `DrawerLayout` support widget.
-        // The deprecated `getResources().getDrawable()` must be used until the minimum API >= 21 and and `getResources().getColor()` must be used until the minimum API >= 23.
-        if (darkTheme) {
-            launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
-            createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
-            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_dark));
-            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.gray_850));
-        } else {
-            launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_light));
-            createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_light));
-            createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_light));
-            bookmarksListView.setBackgroundColor(getResources().getColor(R.color.white));
+            // Reset `restartFromBookmarksActivity`.
+            restartFromBookmarksActivity = false;
         }
 
-        // Set the launch bookmarks activity FAB to launch the bookmarks activity.
-        launchBookmarksActivityFab.setOnClickListener(v -> {
-            // Get a copy of the favorite icon bitmap.
-            Bitmap favoriteIconBitmap = currentWebView.getFavoriteOrDefaultIcon();
+        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
+        updatePrivacyIcons(true);
+    }
 
-            // Create a favorite icon byte array output stream.
-            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
+    @Override
+    public void onResume() {
+        // Run the default commands.
+        super.onResume();
 
-            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
+        // Resume any WebViews.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // Convert the favorite icon byte array stream to a byte array.
-            byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-            // Create an intent to launch the bookmarks activity.
-            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
+            // Only resume the WebViews if they exist (they won't when the app is first created).
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 
-            // Add the extra information to the intent.
-            bookmarksIntent.putExtra("current_url", currentWebView.getUrl());
-            bookmarksIntent.putExtra("current_title", currentWebView.getTitle());
-            bookmarksIntent.putExtra("current_folder", currentBookmarksFolder);
-            bookmarksIntent.putExtra("favorite_icon_byte_array", favoriteIconByteArray);
-
-            // Make it so.
-            startActivity(bookmarksIntent);
-        });
-
-        // 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());
-
-            // Show the create bookmark folder dialog.
-            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
-        });
-
-        // Set the create new bookmark FAB to display an alert dialog.
-        createBookmarkFab.setOnClickListener(view -> {
-            // Instantiate the create bookmark dialog.
-            DialogFragment createBookmarkDialog = CreateBookmarkDialog.createBookmark(currentWebView.getUrl(), currentWebView.getTitle(), currentWebView.getFavoriteOrDefaultIcon());
-
-            // Display the create bookmark dialog.
-            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
-        });
-
-        // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
-        findOnPageEditText.addTextChangedListener(new TextWatcher() {
-            @Override
-            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
-                // Do nothing.
-            }
-
-            @Override
-            public void onTextChanged(CharSequence s, int start, int before, int count) {
-                // Do nothing.
-            }
-
-            @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());
-                }
-            }
-        });
-
-        // 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);
+                // Resume the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.resumeTimers();
 
-                // Consume the event.
-                return true;
-            } else {  // A different key was pressed.
-                // Do not consume the event.
-                return false;
+                // Resume the nested scroll WebView.
+                nestedScrollWebView.onResume();
             }
-        });
-
-        // Implement swipe to refresh.
-        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
-
-        // Store the default progress view offsets for use later in `initializeWebView()`.
-        defaultProgressViewStartOffset = swipeRefreshLayout.getProgressViewStartOffset();
-        defaultProgressViewEndOffset = swipeRefreshLayout.getProgressViewEndOffset();
+        }
 
-        // 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);
+        // Reapply the proxy settings if the system is using a proxy.  This redisplays the appropriate alert dialog.
+        if (!proxyMode.equals(ProxyHelper.NONE)) {
+            applyProxy(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));
+        // Reapply any system UI flags and the ad in the free flavor.
+        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {  // The system is displaying a website or a video in full screen mode.
+            // Get a handle for the root frame layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-        // 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);
+            // 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);
 
-        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
-        currentBookmarksFolder = "";
+            /* 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")) {  // The system in not in full screen mode.
+            // Resume the ad.
+            AdHelper.resumeAd(findViewById(R.id.adview));
+        }
+    }
 
-        // Load the home folder, which is `""` in the database.
-        loadBookmarksFolder();
+    @Override
+    public void onPause() {
+        // Run the default commands.
+        super.onPause();
 
-        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;
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // Get the bookmark cursor for this ID and move it to the first row.
-            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
-            bookmarkCursor.moveToFirst();
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-            // 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 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);
 
-                // 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)));
+                // Pause the nested scroll WebView.
+                nestedScrollWebView.onPause();
 
-                // Close the bookmarks drawer.
-                drawerLayout.closeDrawer(GravityCompat.END);
+                // Pause the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.pauseTimers();
             }
+        }
 
-            // Close the `Cursor`.
-            bookmarkCursor.close();
-        });
-
-        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
-            // Convert the database ID from `long` to `int`.
-            int databaseId = (int) id;
+        // 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));
+        }
+    }
 
-            // Find out if the selected bookmark is a folder.
-            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
+    @Override
+    public void onDestroy() {
+        // Unregister the orbot status broadcast receiver.
+        this.unregisterReceiver(orbotStatusBroadcastReceiver);
 
-            if (isFolder) {
-                // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
-                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
 
-                // 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));
-            }
+        // Run the default commands.
+        super.onDestroy();
+    }
 
-            // Consume the event.
-            return true;
-        });
+    @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);
 
-        // Get the status bar pixel size.
-        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
-        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
+        optionsMenu = menu;
 
-        // Get the resource density.
-        float screenDensity = getResources().getDisplayMetrics().density;
+        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
+        updatePrivacyIcons(false);
 
-        // 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 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);
 
-        // The drawer listener is used to update the navigation menu.`
-        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
-            @Override
-            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
-            }
+        // Only display third-party cookies if API >= 21
+        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
-            @Override
-            public void onDrawerOpened(@NonNull View drawerView) {
-            }
+        // 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);
 
-            @Override
-            public void onDrawerClosed(@NonNull View drawerView) {
-            }
+        // 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);
 
-            @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);
+        // Only show Ad Consent if this is the free flavor.
+        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 
-                    // 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 shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // 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);
-                    }
+        // 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);
 
-                    // Update the navigation menu items.
-                    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 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);
+        }
 
-                    // Hide the keyboard (if displayed).
-                    inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+        // Replace Refresh with Stop if a URL is already loading.
+        if (currentWebView != null && currentWebView.getProgress() != 100) {
+            // Set the title.
+            refreshMenuItem.setTitle(R.string.stop);
 
-                    // 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();
+            // 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);
                 }
             }
-        });
+        }
 
-        // 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);
-
-        // 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", "");
-
-        // 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);
-
-        // Inflate a bare WebView to get the default user agent.  It is not used to render content on the screen.
-        @SuppressLint("InflateParams") View webViewLayout = getLayoutInflater().inflate(R.layout.bare_webview, null, false);
-
-        // Get a handle for the WebView.
-        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
-
-        // Store the default user agent.
-        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
-
-        // Destroy the bare WebView.
-        bareWebView.destroy();
+        // Done.
+        return true;
     }
 
     @Override
-    protected void onNewIntent(Intent intent) {
-        // Get the information from the intent.
-        String intentAction = intent.getAction();
-        Uri intentUriData = intent.getData();
-
-        // Determine if this is a web search.
-        boolean isWebSearch = ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH));
+    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 proxyMenuItem = menu.findItem(R.id.proxy);
+        MenuItem userAgentMenuItem = menu.findItem(R.id.user_agent);
+        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);
 
-        // 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);
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-            // 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;
+        // Initialize the current user agent string and the font size.
+        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
+        int fontSize = 100;
 
-                // Add a new tab.
-                addTab(null);
+        // 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);
             }
 
-            // Create a URL string.
-            String url;
+            // Get the current user agent from the WebView.
+            currentUserAgent = currentWebView.getSettings().getUserAgentString();
 
-            // If the intent action is a web search, perform the search.
-            if (isWebSearch) {
-                // Create an encoded URL string.
-                String encodedUrlString;
+            // Get the current font size from the
+            fontSize = currentWebView.getSettings().getTextZoom();
 
-                // Sanitize the search input and convert it to a search.
-                try {
-                    encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
-                } catch (UnsupportedEncodingException exception) {
-                    encodedUrlString = "";
-                }
+            // 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));
 
-                // 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();
+                // Enable third-party cookies if first-party cookies are enabled.
+                thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
             }
 
-            // Load the URL.
-            loadUrl(url);
+            // Enable DOM Storage if JavaScript is enabled.
+            domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
+        }
 
-            // Get a handle for the drawer layout.
-            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        // Set the checked status of the first party cookies menu item.
+        firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
 
-            // Close the navigation drawer if it is open.
-            if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
-                drawerLayout.closeDrawer(GravityCompat.START);
-            }
+        // Enable Clear Cookies if there are any.
+        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
 
-            // Close the bookmarks drawer if it is open.
-            if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
-                drawerLayout.closeDrawer(GravityCompat.END);
-            }
+        // 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 the keyboard if displayed and remove the focus on the urlTextBar if it has it.
-            currentWebView.requestFocus();
+        // 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()) {
+            // `Objects.requireNonNull` removes a lint warning that `localStorageDirectory.list` might produce a null pointed exception if it is dereferenced.
+            localStorageDirectoryNumberOfFiles = Objects.requireNonNull(localStorageDirectory.list()).length;
         }
-    }
 
-    @Override
-    public void onRestart() {
-        // Run the default commands.
-        super.onRestart();
+        // 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()) {
+            // `Objects.requireNonNull` removes a lint warning that `indexedDBDirectory.list` might produce a null pointed exception if it is dereferenced.
+            indexedDBDirectoryNumberOfFiles = Objects.requireNonNull(indexedDBDirectory.list()).length;
+        }
 
-        // 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");
+        // Enable Clear DOM Storage if there is any.
+        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
 
-            // Send the intent to the Orbot package.
-            orbotIntent.setPackage("org.torproject.android");
+        // 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);
 
-            // Make it so.
-            sendBroadcast(orbotIntent);
+            // Enable the clear form data menu item if there is anything to clear.
+            clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
         }
 
-        // Apply the app settings if returning from the Settings activity.
-        if (reapplyAppSettingsOnRestart) {
-            // Reset the reapply app settings on restart tracker.
-            reapplyAppSettingsOnRestart = false;
+        // Enable Clear Data if any of the submenu items are enabled.
+        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
 
-            // Apply the app settings.
-            applyAppSettings();
-        }
+        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
+        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
 
-        // Apply the domain settings if returning from the settings or domains activity.
-        if (reapplyDomainSettingsOnRestart) {
-            // Reset the reapply domain settings on restart tracker.
-            reapplyDomainSettingsOnRestart = false;
+        // Set the proxy title and check the applied proxy.
+        switch (proxyMode) {
+            case ProxyHelper.NONE:
+                // Set the proxy title.
+                proxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_none));
 
-            // 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);
+                // Check the proxy None radio button.
+                menu.findItem(R.id.proxy_none).setChecked(true);
+                break;
 
-                // Get the fragment view.
-                View fragmentView = webViewTabFragment.getView();
+            case ProxyHelper.TOR:
+                // Set the proxy title.
+                proxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_tor));
 
-                // 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);
+                // Check the proxy Tor radio button.
+                menu.findItem(R.id.proxy_tor).setChecked(true);
+                break;
 
-                    // Reset the current domain name so the domain settings will be reapplied.
-                    nestedScrollWebView.resetCurrentDomainName();
+            case ProxyHelper.I2P:
+                // Set the proxy title.
+                proxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_i2p));
 
-                    // 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);
-                    }
-                }
-            }
-        }
+                // Check the proxy I2P radio button.
+                menu.findItem(R.id.proxy_i2p).setChecked(true);
+                break;
 
-        // Load the URL on restart (used when loading a bookmark).
-        if (loadUrlOnRestart) {
-            // Load the specified URL.
-            loadUrl(urlToLoadOnRestart);
+            case ProxyHelper.CUSTOM:
+                // Set the proxy title.
+                proxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_custom));
 
-            // Reset the load on restart tracker.
-            loadUrlOnRestart = false;
+                // Check the proxy Custom radio button.
+                menu.findItem(R.id.proxy_custom).setChecked(true);
+                break;
         }
 
-        // Update the bookmarks drawer if returning from the Bookmarks activity.
-        if (restartFromBookmarksActivity) {
-            // Get a handle for the drawer layout.
-            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        // 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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_privacy_browser));
 
-            // Close the bookmarks drawer.
-            drawerLayout.closeDrawer(GravityCompat.END);
+            // Select the Privacy Browser radio box.
+            menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
+        } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_webview_default));
 
-            // Reload the bookmarks drawer.
-            loadBookmarksFolder();
+            // Select the WebView Default radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_firefox_on_android));
 
-            // Reset `restartFromBookmarksActivity`.
-            restartFromBookmarksActivity = false;
-        }
+            // Select the Firefox on Android radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_chrome_on_android));
 
-        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
-        updatePrivacyIcons(true);
-    }
+            // Select the Chrome on Android radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_safari_on_ios));
 
-    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
-    @Override
-    public void onResume() {
-        // Run the default commands.
-        super.onResume();
+            // Select the Safari on iOS radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_firefox_on_linux));
 
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+            // Select the Firefox on Linux radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_chromium_on_linux));
 
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
+            // Select the Chromium on Linux radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_firefox_on_windows));
 
-            // 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);
+            // Select the Firefox on Windows radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_chrome_on_windows));
 
-                // Resume the nested scroll WebView JavaScript timers.
-                nestedScrollWebView.resumeTimers();
+            // Select the Chrome on Windows radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_edge_on_windows));
 
-                // Resume the nested scroll WebView.
-                nestedScrollWebView.onResume();
-            }
-        }
+            // Select the Edge on Windows radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_internet_explorer_on_windows));
+
+            // Select the Internet on Windows radio box.
+            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.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_safari_on_macos));
 
-        // 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);
+            // Select the Safari on macOS radio box.
+            menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
+        } else {  // Custom user agent.
+            // Update the user agent menu item title.
+            userAgentMenuItem.setTitle(getString(R.string.user_agent) + " - " + getString(R.string.user_agent_custom));
 
-            // 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);
+            // Select the Custom radio box.
+            menu.findItem(R.id.user_agent_custom).setChecked(true);
         }
 
-        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
-            // Get a handle for the root frame layouts.
-            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+        // Set the font size title.
+        fontSizeMenuItem.setTitle(getString(R.string.font_size) + " - " + fontSize + "%");
 
-            // 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);
+        // Run all the other default commands.
+        super.onPrepareOptionsMenu(menu);
 
-            /* 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));
-        }
+        // Display the menu.
+        return true;
     }
 
     @Override
-    public void onPause() {
-        // Run the default commands.
-        super.onPause();
-
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+    // 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;
+
+                    // Get the current domain
+                    Uri currentUri = Uri.parse(currentWebView.getUrl());
+                    String currentDomain = currentUri.getHost();
+
+                    // 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);
+
+                    // Create the domain and store the database ID.
+                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
+
+                    // 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", newDomainDatabaseId);
+                    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);
+                }
+
+                // Consume the event.
+                return true;
+
+            case R.id.toggle_first_party_cookies:
+                // Switch the first-party cookie status.
+                cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
+
+                // Store the first-party cookie status.
+                currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
+
+                // Update the menu checkbox.
+                menuItem.setChecked(cookieManager.acceptCookie());
+
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(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();
+                }
+
+                // 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));
+
+                    // Update the menu checkbox.
+                    menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
+
+                    // 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();
+                    }
+
+                    // Reload the current WebView.
+                    currentWebView.reload();
+                } // Else do nothing because SDK < 21.
+
+                // Consume the event.
+                return true;
+
+            case R.id.toggle_dom_storage:
+                // Toggle the status of domStorageEnabled.
+                currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
+
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+
+                // Update the privacy icon.  `true` refreshes the app bar icons.
+                updatePrivacyIcons(true);
+
+                // 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;
+
+            // 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());
+
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
+
+                // 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();
+                }
+
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            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();
+
+                // Consume the event.
+                return true;
+
+            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();
+
+                                    // 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/"});
+
+                                            // 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");
+
+                                            // 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.
+                                        }
+                                    };
+
+                                    // Manually delete the DOM storage files after 200 milliseconds.
+                                    deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
+                                }
+                            }
+                        })
+                        .show();
+
+                // Consume the event.
+                return true;
+
+            // 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();
+
+                // Consume the event.
+                return true;
+
+            case R.id.easylist:
+                // Toggle the EasyList status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASYLIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
+
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.easyprivacy:
+                // Toggle the EasyPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
+
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.fanboys_annoyance_list:
+                // Toggle Fanboy's Annoyance List status.
+                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+
+                // 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));
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            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));
+
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.ultralist:
+                // Toggle the UltraList status.
+                currentWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
+
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.ultraprivacy:
+                // Toggle the UltraPrivacy status.
+                currentWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
+
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            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));
+
+                // Update the menu checkbox.
+                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.proxy_none:
+                // Update the proxy mode.
+                proxyMode = ProxyHelper.NONE;
+
+                // Apply the proxy mode.
+                applyProxy(true);
+
+                // Consume the event.
+                return true;
+
+            case R.id.proxy_tor:
+                // Update the proxy mode.
+                proxyMode = ProxyHelper.TOR;
+
+                // Apply the proxy mode.
+                applyProxy(true);
+
+                // Consume the event.
+                return true;
+
+            case R.id.proxy_i2p:
+                // Update the proxy mode.
+                proxyMode = ProxyHelper.I2P;
+
+                // Apply the proxy mode.
+                applyProxy(true);
+
+                // Consume the event.
+                return true;
+
+            case R.id.proxy_custom:
+                // Update the proxy mode.
+                proxyMode = ProxyHelper.CUSTOM;
+
+                // Apply the proxy mode.
+                applyProxy(true);
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_privacy_browser:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_webview_default:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString("");
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_firefox_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_chrome_on_android:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_safari_on_ios:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_firefox_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_chromium_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_firefox_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_chrome_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_edge_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
 
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
+                // Reload the current WebView.
+                currentWebView.reload();
 
-            // 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;
 
-                // Pause the nested scroll WebView.
-                nestedScrollWebView.onPause();
+            case R.id.user_agent_internet_explorer_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
 
-                // Pause the nested scroll WebView JavaScript timers.
-                nestedScrollWebView.pauseTimers();
-            }
-        }
+                // Reload the current WebView.
+                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));
-        }
-    }
+                // Consume the event.
+                return true;
 
-    @Override
-    public void onDestroy() {
-        // Unregister the Orbot status broadcast receiver.
-        this.unregisterReceiver(orbotStatusBroadcastReceiver);
+            case R.id.user_agent_safari_on_macos:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
 
-        // Close the bookmarks cursor and database.
-        bookmarksCursor.close();
-        bookmarksDatabaseHelper.close();
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Run the default commands.
-        super.onDestroy();
-    }
+                // Consume the event.
+                return true;
 
-    @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);
+            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)));
 
-        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
-        optionsMenu = menu;
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(false);
+                // Consume the event.
+                return true;
 
-        // 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);
+            case R.id.font_size:
+                // Instantiate the font size dialog.
+                DialogFragment fontSizeDialogFragment = FontSizeDialog.displayDialog(currentWebView.getSettings().getTextZoom());
+
+                // Show the font size dialog.
+                fontSizeDialogFragment.show(getSupportFragmentManager(), getString(R.string.font_size));
+
+                // Consume the event.
+                return true;
+
+            case R.id.swipe_to_refresh:
+                // Toggle the stored status of swipe to refresh.
+                currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
+
+                // Get a handle for the swipe refresh layout.
+                SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+
+                // 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);
+                }
+
+                // Consume the event.
+                return true;
+
+            case R.id.wide_viewport:
+                // Toggle the viewport.
+                currentWebView.getSettings().setUseWideViewPort(!currentWebView.getSettings().getUseWideViewPort());
+
+                // Consume the event.
+                return true;
+
+            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);
+                }
+
+                // 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.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);
+
+                // Set the minimum height of the find on page linear layout to match the toolbar.
+                findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
+
+                // Hide the toolbar.
+                toolbar.setVisibility(View.GONE);
+
+                // Show the find on page linear layout.
+                findOnPageLinearLayout.setVisibility(View.VISIBLE);
+
+                // 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();
+
+                    // Get a handle for the input method manager.
+                    InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+                    // Remove the lint warning below that the input method manager might be null.
+                    assert inputMethodManager != null;
+
+                    // Display the keyboard.  `0` sets no input flags.
+                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
+                }, 200);
+
+                // 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;
+
+            case R.id.save_as_archive:
+                // Instantiate the save webpage archive dialog.
+                DialogFragment saveWebpageArchiveDialogFragment = SaveWebpageDialog.saveWebpage(StoragePermissionDialog.SAVE_ARCHIVE);
+
+                // Show the save webpage archive dialog.
+                saveWebpageArchiveDialogFragment.show(getSupportFragmentManager(), getString(R.string.save_webpage));
+
+                // Consume the event.
+                return true;
+
+            case R.id.save_as_image:
+                // Instantiate the save webpage image dialog.
+                DialogFragment saveWebpageImageDialogFragment = SaveWebpageDialog.saveWebpage(StoragePermissionDialog.SAVE_IMAGE);
+
+                // Show the save webpage image dialog.
+                saveWebpageImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.save_webpage));
+
+                // Consume the event.
+                return true;
+
+            case R.id.add_to_homescreen:
+                // Instantiate the create home screen shortcut dialog.
+                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
+                        currentWebView.getFavoriteOrDefaultIcon());
+
+                // Show the create home screen shortcut dialog.
+                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
+
+                // Consume the event.
+                return true;
+
+            case R.id.view_source:
+                // Create an intent to launch the view source activity.
+                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
+
+                // Add the variables to the intent.
+                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
+                viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
+
+                // Make it so.
+                startActivity(viewSourceIntent);
+
+                // Consume the event.
+                return true;
+
+            case R.id.share_url:
+                // Setup the share string.
+                String shareString = currentWebView.getTitle() + " â€“ " + currentWebView.getUrl();
+
+                // Create the share intent.
+                Intent shareIntent = new Intent(Intent.ACTION_SEND);
+                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
+                shareIntent.setType("text/plain");
+
+                // Make it so.
+                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
+
+                // Consume the event.
+                return true;
+
+            case R.id.open_with_app:
+                // Open the URL with an outside app.
+                openWithApp(currentWebView.getUrl());
+
+                // Consume the event.
+                return true;
+
+            case R.id.open_with_browser:
+                // Open the URL with an outside browser.
+                openWithBrowser(currentWebView.getUrl());
+
+                // 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 {  // The stop button was pushed.
+                    // Stop the loading of the WebView.
+                    currentWebView.stopLoading();
+                }
 
-        // 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.ad_consent:
+                // Instantiate the ad consent dialog.
+                DialogFragment adConsentDialogFragment = new AdConsentDialog();
 
-        // 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);
+                // Display the ad consent dialog.
+                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
 
-        // 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.
+            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);
 
-        // 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);
+        // 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;
 
-        // 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);
-        }
+            case R.id.home:
+                // Load the homepage.
+                loadUrl(currentWebView, sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+                break;
 
-        // 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.back:
+                if (currentWebView.canGoBack()) {
+                    // Get the current web back forward list.
+                    WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-            // If the icon is displayed in the AppBar, set it according to the theme.
-            if (displayAdditionalAppBarIcons) {
-                if (darkTheme) {
-                    refreshMenuItem.setIcon(R.drawable.close_dark);
-                } else {
-                    refreshMenuItem.setIcon(R.drawable.close_light);
-                }
-            }
-        }
+                    // Get the previous entry URL.
+                    String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
 
-        return true;
-    }
+                    // Apply the domain settings.
+                    applyDomainSettings(currentWebView, previousUrl, false, false);
 
-    @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);
+                    // Load the previous website in the history.
+                    currentWebView.goBack();
+                }
+                break;
 
-        // Get a handle for the cookie manager.
-        CookieManager cookieManager = CookieManager.getInstance();
+            case R.id.forward:
+                if (currentWebView.canGoForward()) {
+                    // Get the current web back forward list.
+                    WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-        // Initialize the current user agent string and the font size.
-        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
-        int fontSize = 100;
+                    // Get the next entry URL.
+                    String nextUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() + 1).getUrl();
 
-        // 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);
-            }
+                    // Apply the domain settings.
+                    applyDomainSettings(currentWebView, nextUrl, false, false);
 
-            // Get the current user agent from the WebView.
-            currentUserAgent = currentWebView.getSettings().getUserAgentString();
+                    // Load the next website in the history.
+                    currentWebView.goForward();
+                }
+                break;
 
-            // Get the current font size from the
-            fontSize = currentWebView.getSettings().getTextZoom();
+            case R.id.history:
+                // Instantiate the URL history dialog.
+                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
 
-            // 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());
+                // Show the URL history dialog.
+                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
+                break;
 
-            // 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));
+            case R.id.open:
+                // Instantiate the open file dialog.
+                DialogFragment openDialogFragment = new OpenDialog();
 
-            // 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));
+                // Show the open file dialog.
+                openDialogFragment.show(getSupportFragmentManager(), getString(R.string.open));
+                break;
 
-                // Enable third-party cookies if first-party cookies are enabled.
-                thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
-            }
+            case R.id.requests:
+                // Populate the resource requests.
+                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
 
-            // Enable DOM Storage if JavaScript is enabled.
-            domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
-        }
+                // Create an intent to launch the Requests activity.
+                Intent requestsIntent = new Intent(this, RequestsActivity.class);
 
-        // Set the status of the menu item checkboxes.
-        firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
-        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
+                // Add the block third-party requests status to the intent.
+                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-        // Enable Clear Cookies if there are any.
-        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
+                // Make it so.
+                startActivity(requestsIntent);
+                break;
 
-        // 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;
+            case R.id.downloads:
+                // Launch the system Download Manager.
+                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
 
-        // 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;
-        }
+                // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
+                downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 
-        // Get 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;
-        }
+                startActivity(downloadManagerIntent);
+                break;
 
-        // Enable Clear DOM Storage if there is any.
-        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
+            case R.id.domains:
+                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
+                reapplyDomainSettingsOnRestart = true;
 
-        // 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);
+                // Launch the domains activity.
+                Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-            // Enable the clear form data menu item if there is anything to clear.
-            clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
-        }
+                // Add the extra information to the intent.
+                domainsIntent.putExtra("current_url", currentWebView.getUrl());
 
-        // Enable Clear Data if any of the submenu items are enabled.
-        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
+                // Get the current certificate.
+                SslCertificate sslCertificate = currentWebView.getCertificate();
 
-        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
-        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
+                // 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();
 
-        // 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);
-        }
+                    // 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);
+                }
 
-        // Instantiate the font size title and the selected font size menu item.
-        String fontSizeTitle;
-        MenuItem selectedFontSizeMenuItem;
+                // 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());
+                }
 
-        // 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);
+                // Make it so.
+                startActivity(domainsIntent);
                 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 R.id.settings:
+                // Set the flag to reapply app settings on restart when returning from Settings.
+                reapplyAppSettingsOnRestart = 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;
+                // Set the flag to reapply the domain settings on restart when returning from Settings.
+                reapplyDomainSettingsOnRestart = true;
 
-            case 100:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                // Launch the settings activity.
+                Intent settingsIntent = new Intent(this, SettingsActivity.class);
+                startActivity(settingsIntent);
                 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);
+            case R.id.import_export:
+                // Launch the import/export activity.
+                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
+                startActivity(importExportIntent);
                 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);
+            case R.id.logcat:
+                // Launch the logcat activity.
+                Intent logcatIntent = new Intent(this, LogcatActivity.class);
+                startActivity(logcatIntent);
                 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);
+            case R.id.guide:
+                // Launch `GuideActivity`.
+                Intent guideIntent = new Intent(this, GuideActivity.class);
+                startActivity(guideIntent);
                 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;
+            case R.id.about:
+                // Create an intent to launch the about activity.
+                Intent aboutIntent = new Intent(this, AboutActivity.class);
 
-            default:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                // 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]};
+
+                // Add the blocklist versions to the intent.
+                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
+
+                // Make it so.
+                startActivity(aboutIntent);
                 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);
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-        // Display the menu.
+        // Close the navigation drawer.
+        drawerLayout.closeDrawer(GravityCompat.START);
         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);
+    public void onPostCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onPostCreate(savedInstanceState);
 
-            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
+        actionBarDrawerToggle.syncState();
+    }
 
-            /* 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);
-        }
+    @Override
+    public void onConfigurationChanged(@NonNull Configuration newConfig) {
+        // Run the default commands.
+        super.onConfigurationChanged(newConfig);
 
-        // Get the selected menu item ID.
-        int menuItemId = menuItem.getItemId();
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-        // Get a handle for the cookie manager.
-        CookieManager cookieManager = CookieManager.getInstance();
+        // Recalculate the drawer header padding.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
 
-        // 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());
+        // 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));
+        }
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
+        // https://code.google.com/p/android/issues/detail?id=20493#c8
+        // ActivityCompat.invalidateOptionsMenu(this);
+    }
 
-                // Display a `Snackbar`.
-                if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
-                } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
-                } else {  // Privacy mode.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
-                }
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
+        // Store the hit test result.
+        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Define the URL strings.
+        final String imageUrl;
+        final String linkUrl;
 
-            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;
+        // Get handles for the system managers.
+        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+        FragmentManager fragmentManager = getSupportFragmentManager();
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+        // Remove the lint errors below that the clipboard manager might be null.
+        assert clipboardManager != null;
 
-                    // 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());
+        // 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();
 
-                    // Get the current certificate.
-                    SslCertificate sslCertificate = currentWebView.getCertificate();
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-                    // 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 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 and move to it.
+                    addNewTab(linkUrl, 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);
-                    }
+                    // Consume the event.
+                    return true;
+                });
 
-                    // 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 an Open in Background entry.
+                menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the link URL in a new tab but do not move to it.
+                    addNewTab(linkUrl, false);
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                } else {  // Add a new domain.
-                    // Apply the new domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
+                    // Consume the event.
+                    return true;
+                });
 
-                    // Get the current domain
-                    Uri currentUri = Uri.parse(currentWebView.getUrl());
-                    String currentDomain = currentUri.getHost();
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(linkUrl);
 
-                    // 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);
+                    // Consume the event.
+                    return true;
+                });
 
-                    // Create the domain and store the database ID.
-                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
+                // Add an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(linkUrl);
 
-                    // 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());
+                // 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);
 
-                    // Get the current certificate.
-                    SslCertificate sslCertificate = currentWebView.getCertificate();
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
 
-                    // 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);
-                    }
+                // 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;
+
+                            // 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);
+
+                                // 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}, PERMISSION_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);
 
-                    // 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());
+                            // Show the download file alert dialog.
+                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
                     }
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                }
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.toggle_first_party_cookies:
-                // Switch the first-party cookie status.
-                cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
+                // Add a Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
 
-                // Store the first-party cookie status.
-                currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
+            case WebView.HitTestResult.EMAIL_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(cookieManager.acceptCookie());
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // 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);
 
-                // 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();
-                }
+                    // Parse the url and set it as the data for the `Intent`.
+                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                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.toggle_third_party_cookies:
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Switch the status of thirdPartyCookiesEnabled.
-                    cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
+                    // Make it so.
+                    startActivity(emailIntent);
 
-                    // 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();
-                    }
+                // 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);
 
-                    // Reload the current WebView.
-                    currentWebView.reload();
-                } // Else do nothing because SDK < 21.
-                return true;
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
 
-            case R.id.toggle_dom_storage:
-                // Toggle the status of domStorageEnabled.
-                currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
+                    // Consume the event.
+                    return true;
+                });
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
 
-                // Update the privacy icon.  `true` refreshes the app bar icons.
-                updatePrivacyIcons(true);
+            // `IMAGE_TYPE` is an image.
+            case WebView.HitTestResult.IMAGE_TYPE:
+                // Get the image URL.
+                imageUrl = hitTestResult.getExtra();
 
-                // 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();
-                }
+                // Set the image URL as the title of the context menu.
+                menu.setHeaderTitle(imageUrl);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // 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, true);
 
-            // 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());
+                    // Consume the event.
+                    return true;
+                });
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    // Load the image in the current tab.
+                    loadUrl(currentWebView, imageUrl);
 
-                // 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();
-                }
+                    // Consume the event.
+                    return true;
+                });
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(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;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                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.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 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}, PERMISSION_DOWNLOAD_IMAGE_REQUEST_CODE);
                             }
-                        })
-                        .show();
-                return true;
-
-            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();
+                        } else {  // The storage permission has already been granted.
+                            // Get a handle for the download image alert dialog.
+                            DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
 
-                                    // Initialize a handler to manually delete the DOM storage files and directories.
-                                    Handler deleteDomStorageHandler = new Handler();
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
 
-                                    // 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();
+                    // Consume the event.
+                    return true;
+                });
 
-                                            // 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;
+                // 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);
 
-                                            // 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/"});
+                    // Set the clip data as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(imageTypeClipData);
 
-                                            // 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");
+                    // Consume the event.
+                    return true;
+                });
 
-                                            // 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 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);
 
-                                    // Manually delete the DOM storage files after 200 milliseconds.
-                                    deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            // 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;
+                // 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);
 
-            case R.id.easylist:
-                // Toggle the EasyList status.
-                currentWebView.enableBlocklist(NestedScrollWebView.EASY_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
+                    // Consume the event.
+                    return true;
+                });
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
+                // Add a Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                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.easyprivacy:
-                // Toggle the EasyPrivacy status.
-                currentWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
+                // Instantiate a handler.
+                Handler handler = new Handler();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
+                // Get a message from the handler.
+                Message message = handler.obtainMessage();
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Request the image details from the last touched node be returned in the message.
+                currentWebView.requestFocusNodeHref(message);
 
-            case R.id.fanboys_annoyance_list:
-                // Toggle Fanboy's Annoyance List status.
-                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+                // Get the link URL from the message data.
+                linkUrl = message.getData().getString("url");
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+                // Set the link URL as the title of the context menu.
+                menu.setHeaderTitle(linkUrl);
 
-                // 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));
+                // 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 and move to it.
+                    addNewTab(linkUrl, true);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            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));
+                // Add an Open in Background entry.
+                menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Lod the link URL in a new tab but do not move to it.
+                    addNewTab(linkUrl, false);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+                    // Consume the event.
+                    return true;
+                });
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // 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 and move to it.
+                    addNewTab(imageUrl, true);
 
-            case R.id.ultraprivacy:
-                // Toggle the UltraPrivacy status.
-                currentWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
+                    // Consume the event.
+                    return true;
+                });
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener((MenuItem item) -> {
+                   // View the image in the current tab.
+                   loadUrl(currentWebView, imageUrl);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                   // Consume the event.
+                   return true;
+                });
 
-            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));
+                // 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;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+                            // 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);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                                // 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}, PERMISSION_DOWNLOAD_IMAGE_REQUEST_CODE);
+                            }
+                        } else {  // The storage permission has already been granted.
+                            // Get a handle for the download image alert dialog.
+                            DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
 
-            case R.id.user_agent_privacy_browser:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.user_agent_webview_default:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString("");
+                // 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);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                    // Set the clip data as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
 
-            case R.id.user_agent_firefox_on_android:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
+                    // 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) -> {
+                    // Open the link URL with an external app.
+                    openWithApp(linkUrl);
 
-            case R.id.user_agent_chrome_on_android:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
+                    // 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) -> {
+                    // Open the link URL with an external browser.
+                    openWithBrowser(linkUrl);
 
-            case R.id.user_agent_safari_on_ios:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
+                    // Consume the event.
+                    return true;
+                });
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Add a cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
+        }
+    }
 
-            case R.id.user_agent_firefox_on_linux:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
+    @Override
+    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-            case R.id.user_agent_chromium_on_linux:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Get the views from the dialog fragment.
+        EditText createBookmarkNameEditText = dialog.findViewById(R.id.create_bookmark_name_edittext);
+        EditText createBookmarkUrlEditText = dialog.findViewById(R.id.create_bookmark_url_edittext);
 
-            case R.id.user_agent_firefox_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
+        // Extract the strings from the edit texts.
+        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Create a favorite icon byte array output stream.
+        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-            case R.id.user_agent_chrome_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
+        // 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);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Convert the favorite icon byte array stream to a byte array.
+        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-            case R.id.user_agent_edge_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
+        // Display the new bookmark below the current items in the (0 indexed) list.
+        int newBookmarkDisplayOrder = bookmarksListView.getCount();
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Create the bookmark.
+        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 
-            case R.id.user_agent_internet_explorer_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-            case R.id.user_agent_safari_on_macos:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
+        // Scroll to the new bookmark.
+        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return 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);
 
-            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)));
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-            case R.id.font_size_twenty_five_percent:
-                currentWebView.getSettings().setTextZoom(25);
-                return true;
+        // Get handles for the views in the dialog fragment.
+        EditText createFolderNameEditText = dialog.findViewById(R.id.create_folder_name_edittext);
+        RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.create_folder_default_icon_radiobutton);
+        ImageView folderIconImageView = dialog.findViewById(R.id.create_folder_default_icon);
 
-            case R.id.font_size_fifty_percent:
-                currentWebView.getSettings().setTextZoom(50);
-                return true;
+        // Get new folder name string.
+        String folderNameString = createFolderNameEditText.getText().toString();
 
-            case R.id.font_size_seventy_five_percent:
-                currentWebView.getSettings().setTextZoom(75);
-                return true;
+        // Create a folder icon bitmap.
+        Bitmap folderIconBitmap;
 
-            case R.id.font_size_one_hundred_percent:
-                currentWebView.getSettings().setTextZoom(100);
-                return true;
+        // 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.font_size_one_hundred_twenty_five_percent:
-                currentWebView.getSettings().setTextZoom(125);
-                return true;
+            // Convert the folder icon drawable to a bitmap drawable.
+            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-            case R.id.font_size_one_hundred_fifty_percent:
-                currentWebView.getSettings().setTextZoom(150);
-                return true;
+            // Convert the folder icon bitmap drawable to a bitmap.
+            folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+        } else {  // Use the WebView favorite icon.
+            // Copy the favorite icon bitmap to the folder icon bitmap.
+            folderIconBitmap = favoriteIconBitmap;
+        }
 
-            case R.id.font_size_one_hundred_seventy_five_percent:
-                currentWebView.getSettings().setTextZoom(175);
-                return true;
+        // Create a folder icon byte array output stream.
+        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-            case R.id.font_size_two_hundred_percent:
-                currentWebView.getSettings().setTextZoom(200);
-                return 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, folderIconByteArrayOutputStream);
+
+        // Convert the folder icon byte array stream to a byte array.
+        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+
+        // Move all the bookmarks down one in the display order.
+        for (int i = 0; i < bookmarksListView.getCount(); i++) {
+            int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
+            bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
+        }
 
-            case R.id.swipe_to_refresh:
-                // Toggle the stored status of swipe to refresh.
-                currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
+        // Create the folder, which will be placed at the top of the `ListView`.
+        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
 
-                // Get a handle for the swipe refresh layout.
-                SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // 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;
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-            case R.id.display_images:
-                if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
-                    // Disable loading of images.
-                    currentWebView.getSettings().setLoadsImagesAutomatically(false);
+        // Scroll to the new folder.
+        bookmarksListView.setSelection(0);
+    }
 
-                    // 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;
+    @Override
+    public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-            case R.id.night_mode:
-                // Toggle night mode.
-                currentWebView.setNightMode(!currentWebView.getNightMode());
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-                // 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));
-                }
+        // Get handles for the views from the dialog.
+        EditText editBookmarkNameEditText = dialog.findViewById(R.id.edit_bookmark_name_edittext);
+        EditText editBookmarkUrlEditText = dialog.findViewById(R.id.edit_bookmark_url_edittext);
+        RadioButton currentBookmarkIconRadioButton = dialog.findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 
-                // Update the privacy icons.
-                updatePrivacyIcons(false);
+        // Store the bookmark strings.
+        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 
-                // Reload the website.
-                currentWebView.reload();
-                return true;
+        // 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.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);
+            // 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);
 
-                // Set the minimum height of the find on page linear layout to match the toolbar.
-                findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 
-                // Hide the toolbar.
-                toolbar.setVisibility(View.GONE);
+            //  Update the bookmark and the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+        }
 
-                // Show the find on page linear layout.
-                findOnPageLinearLayout.setVisibility(View.VISIBLE);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // 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();
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-                    // Get a handle for the input method manager.
-                    InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+    @Override
+    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-                    // Remove the lint warning below that the input method manager might be null.
-                    assert inputMethodManager != null;
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-                    // Display the keyboard.  `0` sets no input flags.
-                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
-                }, 200);
-                return true;
+        // Get handles for the views from `dialogFragment`.
+        EditText editFolderNameEditText = dialog.findViewById(R.id.edit_folder_name_edittext);
+        RadioButton currentFolderIconRadioButton = dialog.findViewById(R.id.edit_folder_current_icon_radiobutton);
+        RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.edit_folder_default_icon_radiobutton);
+        ImageView defaultFolderIconImageView = dialog.findViewById(R.id.edit_folder_default_icon_imageview);
 
-            case R.id.view_source:
-                // Create an intent to launch the view source activity.
-                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
+        // Get the new folder name.
+        String newFolderNameString = editFolderNameEditText.getText().toString();
 
-                // Add the variables to the intent.
-                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
-                viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
+        // 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;
 
-                // Make it so.
-                startActivity(viewSourceIntent);
-                return true;
+            // Populate the new folder icon bitmap.
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 
-            case R.id.share_url:
-                // Setup the share string.
-                String shareString = currentWebView.getTitle() + " â€“ " + currentWebView.getUrl();
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                // Create the share intent.
-                Intent shareIntent = new Intent(Intent.ACTION_SEND);
-                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
-                shareIntent.setType("text/plain");
+                // 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;
+            }
 
-                // Make it so.
-                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
-                return true;
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-            case R.id.print:
-                // Get a print manager instance.
-                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+            // 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 lint error below that print manager might be null.
-                assert printManager != null;
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-                // Create a print document adapter from the current WebView.
-                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
+            // 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();
 
-                // Print the document.
-                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
-                return true;
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-            case R.id.open_with_app:
-                openWithApp(currentWebView.getUrl());
-                return true;
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Copy the favorite icon bitmap to the folder icon bitmap.
+                folderIconBitmap = favoriteIconBitmap;
+            }
 
-            case R.id.open_with_browser:
-                openWithBrowser(currentWebView.getUrl());
-                return true;
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-            case R.id.add_to_homescreen:
-                // Instantiate the create home screen shortcut dialog.
-                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
-                        currentWebView.getFavoriteOrDefaultIcon());
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
 
-                // Show the create home screen shortcut dialog.
-                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
-                return true;
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-            case R.id.proxy_through_orbot:
-                // Toggle the proxy through Orbot variable.
-                proxyThroughOrbot = !proxyThroughOrbot;
+            // Update the folder name and icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+        }
 
-                // Apply the proxy through Orbot settings.
-                applyProxyThroughOrbot(true);
-                return true;
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-            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;
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-            case R.id.ad_consent:
-                // Display the ad consent dialog.
-                DialogFragment adConsentDialogFragment = new AdConsentDialog();
-                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
-                return true;
+    @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}, PERMISSION_DOWNLOAD_FILE_REQUEST_CODE);
+                break;
 
-            default:
-                // Don't consume the event.
-                return super.onOptionsItemSelected(menuItem);
+            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}, PERMISSION_DOWNLOAD_IMAGE_REQUEST_CODE);
+                break;
         }
     }
 
-    // removeAllCookies is deprecated, but it is required for API < 21.
     @Override
-    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
-        // Get the menu item ID.
-        int menuItemId = menuItem.getItemId();
+    public void 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);
 
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+            // Parse `imageUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
 
-        // 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;
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
+
+            // 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);
 
-            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;
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
-            case R.id.back:
-                if (currentWebView.canGoBack()) {
-                    // Reset the current domain name so that navigation works if third-party requests are blocked.
-                    currentWebView.resetCurrentDomainName();
+            // Get the dialog.
+            Dialog dialog = dialogFragment.getDialog();
 
-                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
-                    currentWebView.setNavigatingHistory(true);
+            // Remove the incorrect lint warning below that the dialog might be null.
+            assert dialog != null;
 
-                    // Load the previous website in the history.
-                    currentWebView.goBack();
-                }
-                break;
+            // Get the file name from the dialog fragment.
+            EditText downloadImageNameEditText = dialog.findViewById(R.id.download_image_name);
+            String imageName = downloadImageNameEditText.getText().toString();
 
-            case R.id.forward:
-                if (currentWebView.canGoForward()) {
-                    // Reset the current domain name so that navigation works if third-party requests are blocked.
-                    currentWebView.resetCurrentDomainName();
+            // Specify the download location.
+            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
+                // Download to the public download directory.
+                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, imageName);
+            } else {  // External write permission denied.
+                // Download to the app's external download directory.
+                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, imageName);
+            }
 
-                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
-                    currentWebView.setNavigatingHistory(true);
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-                    // Load the next website in the history.
-                    currentWebView.goForward();
-                }
-                break;
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(imageUrl);
 
-            case R.id.history:
-                // Instantiate the URL history dialog.
-                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-                // Show the URL history dialog.
-                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
-                break;
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-            case R.id.requests:
-                // Populate the resource requests.
-                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
+            // 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();
+        }
+    }
 
-                // Create an intent to launch the Requests activity.
-                Intent requestsIntent = new Intent(this, RequestsActivity.class);
+    @Override
+    public void onDownloadFile(DialogFragment dialogFragment, String downloadUrl) {
+        // Download the file if it has an HTTP or HTTPS URI.
+        if (downloadUrl.startsWith("http")) {
+            // Get a handle for the system `DOWNLOAD_SERVICE`.
+            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
 
-                // Add the block third-party requests status to the intent.
-                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            // Parse `downloadUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
 
-                // Make it so.
-                startActivity(requestsIntent);
-                break;
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-            case R.id.downloads:
-                // Launch the system Download Manager.
-                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+            // 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);
 
-                // 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);
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
-                startActivity(downloadManagerIntent);
-                break;
+            // Get the dialog.
+            Dialog dialog = dialogFragment.getDialog();
 
-            case R.id.domains:
-                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
-                reapplyDomainSettingsOnRestart = true;
+            // Remove the incorrect lint warning below that the dialog might be null.
+            assert dialog != null;
 
-                // Launch the domains activity.
-                Intent domainsIntent = new Intent(this, DomainsActivity.class);
+            // Get the file name from the dialog.
+            EditText downloadFileNameEditText = dialog.findViewById(R.id.download_file_name);
+            String fileName = downloadFileNameEditText.getText().toString();
 
-                // Add the extra information to the intent.
-                domainsIntent.putExtra("current_url", currentWebView.getUrl());
+            // Specify the download location.
+            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
+                // Download to the public download directory.
+                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
+            } else {  // External write permission denied.
+                // Download to the app's external download directory.
+                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, fileName);
+            }
 
-                // Get the current certificate.
-                SslCertificate sslCertificate = currentWebView.getCertificate();
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-                // 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 URL as the description for the download.
+            downloadRequest.setDescription(downloadUrl);
 
-                    // 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);
-                }
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-                // 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 `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-                // Make it so.
-                startActivity(domainsIntent);
-                break;
+            // 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();
+        }
+    }
 
-            case R.id.settings:
-                // Set the flag to reapply app settings on restart when returning from Settings.
-                reapplyAppSettingsOnRestart = true;
+    // 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);
 
-                // Set the flag to reapply the domain settings on restart when returning from Settings.
-                reapplyDomainSettingsOnRestart = true;
+        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);
 
-                // Launch the settings activity.
-                Intent settingsIntent = new Intent(this, SettingsActivity.class);
-                startActivity(settingsIntent);
-                break;
+                // 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);
 
-            case R.id.import_export:
-                // Launch the import/export activity.
-                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
-                startActivity(importExportIntent);
-                break;
+            // Re-enable the screen timeout.
+            fullScreenVideoFrameLayout.setKeepScreenOn(false);
 
-            case R.id.logcat:
-                // Launch the logcat activity.
-                Intent logcatIntent = new Intent(this, LogcatActivity.class);
-                startActivity(logcatIntent);
-                break;
+            // Unset the full screen video flag.
+            displayingFullScreenVideo = false;
 
-            case R.id.guide:
-                // Launch `GuideActivity`.
-                Intent guideIntent = new Intent(this, GuideActivity.class);
-                startActivity(guideIntent);
-                break;
+            // Remove all the views from the full screen video frame layout.
+            fullScreenVideoFrameLayout.removeAllViews();
 
-            case R.id.about:
-                // Create an intent to launch the about activity.
-                Intent aboutIntent = new Intent(this, AboutActivity.class);
+            // Hide the full screen video frame layout.
+            fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-                // 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]};
+            // Enable the sliding drawers.
+            drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-                // Add the blocklist versions to the intent.
-                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
+            // Show the main content relative layout.
+            mainContentRelativeLayout.setVisibility(View.VISIBLE);
 
-                // Make it so.
-                startActivity(aboutIntent);
-                break;
-        }
+            // 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();
 
-        // Get a handle for the drawer layout.
-        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+                    // Remove the incorrect lint warning below that the action bar might be null.
+                    assert actionBar != null;
 
-        // Close the navigation drawer.
-        drawerLayout.closeDrawer(GravityCompat.START);
-        return true;
-    }
+                    // Hide the tab linear layout.
+                    tabsLinearLayout.setVisibility(View.GONE);
 
-    @Override
-    public void onPostCreate(Bundle savedInstanceState) {
-        // Run the default commands.
-        super.onPostCreate(savedInstanceState);
+                    // Hide the action bar.
+                    actionBar.hide();
+                }
 
-        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
-        actionBarDrawerToggle.syncState();
-    }
+                // Hide the banner ad in the free flavor.
+                if (BuildConfig.FLAVOR.contentEquals("free")) {
+                    AdHelper.hideAd(findViewById(R.id.adview));
+                }
 
-    @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        // Run the default commands.
-        super.onConfigurationChanged(newConfig);
+                // 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);
 
-        // Get the status bar pixel size.
-        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
-        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+                /* 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);
 
-        // Get the resource density.
-        float screenDensity = getResources().getDisplayMetrics().density;
+                // Add the translucent status flag.
+                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            }
 
-        // Recalculate the drawer header padding.
-        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
-        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
-        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
+            // 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();
 
-        // Reload the ad for the free flavor if not in full screen mode.
-        if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
-            // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
-            AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
-        }
+            // Get the previous entry URL.
+            String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
+
+            // Apply the domain settings.
+            applyDomainSettings(currentWebView, previousUrl, false, false);
+
+            // 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.
+            // Close Privacy Browser.  `finishAndRemoveTask()` also removes Privacy Browser from the recent app list.
+            if (Build.VERSION.SDK_INT >= 21) {
+                finishAndRemoveTask();
+            } else {
+                finish();
+            }
 
-        // `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);
+            // Manually kill Privacy Browser.  Otherwise, it is glitchy when restarted.
+            System.exit(0);
+        }
     }
 
+    // Process the results of a file browse.
     @Override
-    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
-        // Store the hit test result.
-        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
+    public void onActivityResult(int requestCode, int resultCode, Intent returnedIntent) {
+        // Run the default commands.
+        super.onActivityResult(requestCode, resultCode, returnedIntent);
 
-        // Create the URL strings.
-        final String imageUrl;
-        final String linkUrl;
+        // Run the commands that correlate to the specified request code.
+        switch (requestCode) {
+            case BROWSE_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, returnedIntent));
+                }
+                break;
 
-        // Get handles for the system managers.
-        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
-        FragmentManager fragmentManager = getSupportFragmentManager();
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+            case BROWSE_SAVE_WEBPAGE_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 saveWebpageDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.save_webpage));
 
-        // Remove the lint errors below that the clipboard manager might be null.
-        assert clipboardManager != null;
+                    // Only update the file name if the dialog still exists.
+                    if (saveWebpageDialogFragment != null) {
+                        // Get a handle for the save webpage dialog.
+                        Dialog saveWebpageDialog = saveWebpageDialogFragment.getDialog();
 
-        // 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();
+                        // Remove the incorrect lint warning below that the dialog might be null.
+                        assert saveWebpageDialog != null;
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+                        // Get a handle for the file name edit text.
+                        EditText fileNameEditText = saveWebpageDialog.findViewById(R.id.file_name_edittext);
 
-                // Add an Open in New Tab entry.
-                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Add a new tab.
-                    addTab(null);
+                        // Instantiate the file name helper.
+                        FileNameHelper fileNameHelper = new FileNameHelper();
 
-                    // Load the URL.
-                    loadUrl(linkUrl);
-                    return false;
-                });
+                        // Get the file path if it isn't null.
+                        if (returnedIntent.getData() != null) {
+                            // Convert the file name URI to a file name path.
+                            String fileNamePath = fileNameHelper.convertUriToFileNamePath(returnedIntent.getData());
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(linkUrl);
-                    return false;
-                });
+                            // Set the file name path as the text of the file name edit text.
+                            fileNameEditText.setText(fileNamePath);
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(linkUrl);
-                    return false;
-                });
+                            // Move the cursor to the end of the file name edit text.
+                            fileNameEditText.setSelection(fileNamePath.length());
+                        }
+                    }
+                }
+                break;
 
-                // 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 BROWSE_OPEN_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 open dialog fragment.
+                    DialogFragment openDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.open));
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
-                    return false;
-                });
+                    // Only update the file name if the dialog still exists.
+                    if (openDialogFragment != null) {
+                        // Get a handle for the open dialog.
+                        Dialog openDialog = openDialogFragment.getDialog();
 
-                // 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;
+                        // Remove the incorrect lint warning below that the dialog might be null.
+                        assert openDialog != null;
 
-                            // 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);
+                        // Get a handle for the file name edit text.
+                        EditText fileNameEditText = openDialog.findViewById(R.id.file_name_edittext);
 
-                                // 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);
+                        // Instantiate the file name helper.
+                        FileNameHelper fileNameHelper = new FileNameHelper();
 
-                            // Show the download file alert dialog.
-                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                        // Get the file path if it isn't null.
+                        if (returnedIntent.getData() != null) {
+                            // Convert the file name URI to a file name path.
+                            String fileNamePath = fileNameHelper.convertUriToFileNamePath(returnedIntent.getData());
+
+                            // Set the file name path as the text of the file name edit text.
+                            fileNameEditText.setText(fileNamePath);
+
+                            // Move the cursor to the end of the file name edit text.
+                            fileNameEditText.setSelection(fileNamePath.length());
                         }
                     }
-                    return false;
-                });
-
-                // Add a Cancel entry, which by default closes the context menu.
-                menu.add(R.string.cancel);
+                }
                 break;
+        }
+    }
 
-            case WebView.HitTestResult.EMAIL_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+    private void loadUrlFromTextBox() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+        // 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();
 
-                // 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);
+        // Initialize the formatted URL string.
+        String url = "";
 
-                    // Parse the url and set it as the data for the `Intent`.
-                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+        // 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;
+            }
 
-                    // `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);
+            // Initialize `unformattedUrl`.
+            URL unformattedUrl = null;
 
-                    // Make it so.
-                    startActivity(emailIntent);
-                    return false;
-                });
+            // Convert `unformattedUrlString` to a `URL`, then to a `URI`, and then back to a `String`, which sanitizes the input and adds in any missing components.
+            try {
+                unformattedUrl = new URL(unformattedUrlString);
+            } catch (MalformedURLException e) {
+                e.printStackTrace();
+            }
 
-                // Add 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);
+            // 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;
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
-                    return false;
-                });
+            // Build the URI.
+            Uri.Builder uri = new Uri.Builder();
+            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+            // 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;
 
-            // `IMAGE_TYPE` is an image. `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.  Privacy Browser processes them the same.
-            case WebView.HitTestResult.IMAGE_TYPE:
-            case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+            // Sanitize the search input.
+            try {
+                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
 
-                // Set the image URL as the title of the context menu.
-                menu.setHeaderTitle(imageUrl);
+            // Add the base search URL.
+            url = searchURL + encodedUrlString;
+        }
 
-                // Add an Open in New Tab entry.
-                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Add a new tab.
-                    addTab(null);
+        // 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();
 
-                    // Load the URL.
-                    loadUrl(imageUrl);
-                    return false;
-                });
+        // Make it so.
+        loadUrl(currentWebView, url);
+    }
 
-                // Add a View Image entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+    private void loadUrl(NestedScrollWebView nestedScrollWebView, String url) {
+        // Sanitize the URL.
+        url = sanitizeUrl(url);
 
-                // 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(nestedScrollWebView, url, true, 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);
+        // Load the URL.
+        nestedScrollWebView.loadUrl(url, customHeaders);
+    }
 
-                                // 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);
+    public void findPreviousOnPage(View view) {
+        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
+        currentWebView.findNext(false);
+    }
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+    public void findNextOnPage(View view) {
+        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
+        currentWebView.findNext(true);
+    }
 
-                // 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);
+    public void closeFindOnPage(View view) {
+        // Get a handle for the views.
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
+        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
-                    return false;
-                });
+        // Delete the contents of `find_on_page_edittext`.
+        findOnPageEditText.setText(null);
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(imageUrl);
-                    return false;
-                });
+        // Clear the highlighted phrases if the WebView is not null.
+        if (currentWebView != null) {
+            currentWebView.clearMatches();
+        }
+
+        // Hide the find on page linear layout.
+        findOnPageLinearLayout.setVisibility(View.GONE);
+
+        // Show the toolbar.
+        toolbar.setVisibility(View.VISIBLE);
+
+        // Get a handle for the input method manager.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(imageUrl);
-                    return false;
-                });
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
-        }
+        // Hide the keyboard.
+        inputMethodManager.hideSoftInputFromWindow(toolbar.getWindowToken(), 0);
     }
 
     @Override
-    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
-        // Get a handle for the bookmarks list view.
-        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
-
-        // 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);
+    public void onApplyNewFontSize(DialogFragment dialogFragment) {
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-        // Extract the strings from the edit texts.
-        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
+        // Remove the incorrect lint warning below tha the dialog might be null.
+        assert dialog != null;
 
-        // Create a favorite icon byte array output stream.
-        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+        // Get a handle for the font size edit text.
+        EditText fontSizeEditText = dialog.findViewById(R.id.font_size_edittext);
 
-        // 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 the new font size variable with the current font size.
+        int newFontSize = currentWebView.getSettings().getTextZoom();
 
-        // Convert the favorite icon byte array stream to a byte array.
-        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+        // Get the font size from the edit text.
+        try {
+            newFontSize = Integer.valueOf(fontSizeEditText.getText().toString());
+        } catch (Exception exception) {
+            // If the edit text does not contain a valid font size do nothing.
+        }
 
-        // Display the new bookmark below the current items in the (0 indexed) list.
-        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+        // Apply the new font size.
+        currentWebView.getSettings().setTextZoom(newFontSize);
+    }
 
-        // Create the bookmark.
-        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
+    @Override
+    public void onOpen(DialogFragment dialogFragment) {
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
+
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
+
+        // Get a handle for the file name edit text.
+        EditText fileNameEditText = dialog.findViewById(R.id.file_name_edittext);
+
+        // Get the file path string.
+        openFilePath = 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.
+            // Open the file.
+            currentWebView.loadUrl("file://" + openFilePath);
+        } 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 (openFilePath.startsWith(externalPrivateDirectory)) {  // the file path is in the external private directory.
+                // Open the file.
+                currentWebView.loadUrl("file://" + openFilePath);
+            } 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 = StoragePermissionDialog.displayDialog(StoragePermissionDialog.OPEN);
+
+                    // Show the storage permission alert dialog.  The permission will be requested the 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 file will be opened when it finishes.
+                    ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_OPEN_REQUEST_CODE);
+                }
+            }
+        }
+    }
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+    @Override
+    public void onSaveWebpage(int saveType, DialogFragment dialogFragment) {
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
+
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
+
+        // Get a handle for the file name edit text.
+        EditText fileNameEditText = dialog.findViewById(R.id.file_name_edittext);
+
+        // Get the file path string.
+        saveWebpageFilePath = 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 according to the save type.
+            switch (saveType) {
+                case StoragePermissionDialog.SAVE_ARCHIVE:
+                    // Save the webpage archive.
+                    currentWebView.saveWebArchive(saveWebpageFilePath);
+                    break;
+
+                case StoragePermissionDialog.SAVE_IMAGE:
+                    // Save the webpage image.
+                    new SaveWebpageImage(this, currentWebView).execute(saveWebpageFilePath);
+                    break;
+            }
+        } 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 (saveWebpageFilePath.startsWith(externalPrivateDirectory)) {  // The file path is in the external private directory.
+                // Save the webpage according to the save type.
+                switch (saveType) {
+                    case StoragePermissionDialog.SAVE_ARCHIVE:
+                        // Save the webpage archive.
+                        currentWebView.saveWebArchive(saveWebpageFilePath);
+                        break;
 
-        // Update the list view.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+                    case StoragePermissionDialog.SAVE_IMAGE:
+                        // Save the webpage image.
+                        new SaveWebpageImage(this, currentWebView).execute(saveWebpageFilePath);
+                        break;
+                }
+            } 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 = StoragePermissionDialog.displayDialog(saveType);
+
+                    // 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.
+                    switch (saveType) {
+                        case StoragePermissionDialog.SAVE_ARCHIVE:
+                            // Request the write external storage permission.  The webpage archive will be saved when it finishes.
+                            ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_SAVE_WEBPAGE_ARCHIVE_REQUEST_CODE);
+                            break;
 
-        // Scroll to the new bookmark.
-        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+                        case StoragePermissionDialog.SAVE_IMAGE:
+                            // 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}, PERMISSION_SAVE_WEBPAGE_IMAGE_REQUEST_CODE);
+                            break;
+                    }
+                }
+            }
+        }
     }
 
     @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 onCloseStoragePermissionDialog(int requestType) {
+        switch (requestType) {
+            case StoragePermissionDialog.OPEN:
+                // Request the write external storage permission.  The file will be opened when it finishes.
+                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_OPEN_REQUEST_CODE);
+                break;
 
-        // 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);
+            case StoragePermissionDialog.SAVE_ARCHIVE:
+                // Request the write external storage permission.  The webpage archive will be saved when it finishes.
+                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_SAVE_WEBPAGE_ARCHIVE_REQUEST_CODE);
+                break;
 
-        // Get new folder name string.
-        String folderNameString = createFolderNameEditText.getText().toString();
+            case StoragePermissionDialog.SAVE_IMAGE:
+                // 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}, PERMISSION_SAVE_WEBPAGE_IMAGE_REQUEST_CODE);
+                break;
+        }
+    }
 
-        // Create a folder icon bitmap.
-        Bitmap folderIconBitmap;
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        // Get a handle for the fragment manager.
+        FragmentManager fragmentManager = getSupportFragmentManager();
 
-        // 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();
+        switch (requestCode) {
+            case PERMISSION_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);
 
-            // Convert the folder icon drawable to a bitmap drawable.
-            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+                // 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));
+                }
 
-            // 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;
-        }
+                // Reset the download variables.
+                downloadUrl = "";
+                downloadContentDisposition = "";
+                downloadContentLength = 0;
+                break;
 
-        // Create a folder icon byte array output stream.
-        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
+            case PERMISSION_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);
 
-        // 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);
+                // 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));
+                }
 
-        // Convert the folder icon byte array stream to a byte array.
-        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+                // Reset the image URL variable.
+                downloadImageUrl = "";
+                break;
 
-        // 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);
-        }
+            case PERMISSION_OPEN_REQUEST_CODE:
+                // Check to see if the storage permission was granted.  If the dialog was canceled the grant results will be empty.
+                if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) {  // The storage permission was granted.
+                    // Load the file.
+                    currentWebView.loadUrl("file://" + openFilePath);
+                } else {  // The storage permission was not granted.
+                    // Display an error snackbar.
+                    Snackbar.make(currentWebView, getString(R.string.cannot_use_location), Snackbar.LENGTH_LONG).show();
+                }
 
-        // Create the folder, which will be placed at the top of the `ListView`.
-        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
+                // Reset the open file path.
+                openFilePath = "";
+                break;
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+            case PERMISSION_SAVE_WEBPAGE_ARCHIVE_REQUEST_CODE:
+                // Check to see if the storage permission was granted.  If the dialog was canceled the grant results will be empty.
+                if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) {  // The storage permission was granted.
+                    // Save the webpage archive.
+                    currentWebView.saveWebArchive(saveWebpageFilePath);
+                } else {  // The storage permission was not granted.
+                    // Display an error snackbar.
+                    Snackbar.make(currentWebView, getString(R.string.cannot_use_location), Snackbar.LENGTH_LONG).show();
+                }
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+                // Reset the save webpage file path.
+                saveWebpageFilePath = "";
+                break;
 
-        // Scroll to the new folder.
-        bookmarksListView.setSelection(0);
+            case PERMISSION_SAVE_WEBPAGE_IMAGE_REQUEST_CODE:
+                // Check to see if the storage permission was granted.  If the dialog was canceled the grant results 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(saveWebpageFilePath);
+                } 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 webpage file path.
+                saveWebpageFilePath = "";
+                break;
+        }
     }
 
-    @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);
+    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();
+        }
 
-        // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // 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();
+        // 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);
+        proxyMode = sharedPreferences.getString("proxy", getString(R.string.proxy_default_value));
+        fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
+        hideAppBar = sharedPreferences.getBoolean("hide_app_bar", true);
+        scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
 
-            // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
+        // Get the search string.
+        String searchString = sharedPreferences.getString("search", getString(R.string.search_default_value));
 
-            // Convert the favorite icon byte array stream to a byte array.
-            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
+        // Set the search string.
+        if (searchString.equals("Custom URL")) {  // A custom search string is used.
+            searchURL = sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value));
+        } else {  // A custom search string is not used.
+            searchURL = searchString;
+        }
 
-            //  Update the bookmark and the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+        // 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);
+
+        // Remove the incorrect lint warning below that the action bar might be null.
+        assert actionBar != null;
+
+        // Apply the proxy.
+        applyProxy(false);
+
+        // Set Do Not Track status.
+        if (doNotTrackEnabled) {
+            customHeaders.put("DNT", "1");
+        } else {
+            customHeaders.remove("DNT");
         }
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+        // 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();
 
-        // Update the list view.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // 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 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);
+            // Expand the app bar if it is currently collapsed.
+            appBarLayout.setExpanded(true);
+        }
 
-        // Get the new folder name.
-        String newFolderNameString = editFolderNameEditText.getText().toString();
+        // Apply the modified layout parameters.
+        swipeRefreshLayout.setLayoutParams(swipeRefreshLayoutParams);
+        toolbar.setLayoutParams(toolbarLayoutParams);
+        findOnPageLinearLayout.setLayoutParams(findOnPageLayoutParams);
+        tabsLinearLayout.setLayoutParams(tabsLayoutParams);
 
-        // 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 for each WebView.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // Populate the new folder icon bitmap.
-            if (defaultFolderIconRadioButton.isChecked()) {
-                // Get the default folder icon drawable.
-                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-                // Convert the folder icon drawable to a bitmap drawable.
-                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+            // 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);
+
+                // Set the app bar scrolling.
+                nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
+            }
+        }
+
+        // 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 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;
+                // Hide the action bar.
+                actionBar.hide();
+            } else {
+                // Show the tab linear layout.
+                tabsLinearLayout.setVisibility(View.VISIBLE);
+
+                // 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();
+            // Remove the `SYSTEM_UI` flags from the root frame layout.
+            rootFrameLayout.setSystemUiVisibility(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 translucent status flag.
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        }
+    }
 
-            // Convert the folder icon byte array stream to a byte array.
-            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+    private void initializeApp() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            // Update the folder name and icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
-        }
+        // Get the theme preference.
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+        // Get a handle for the input method.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-    @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;
+        // 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));
 
-            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;
-        }
-    }
+        // Get handles for the URL views.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-        // Get a handle for the fragment manager.
-        FragmentManager fragmentManager = getSupportFragmentManager();
+        // 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);
 
-        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);
+                // Reapply the highlighting.
+                highlightUrlText();
+            }
+        });
 
-                // 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));
-                }
+        // 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();
 
-                // Reset the download variables.
-                downloadUrl = "";
-                downloadContentDisposition = "";
-                downloadContentLength = 0;
-                break;
+                // 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;
+            }
+        });
 
-            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);
+        // Create an Orbot status broadcast receiver.
+        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");
 
-                // 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 Privacy Browser is waiting on the proxy, load the website now that Orbot is connected.
+                if ((orbotStatus != null) && orbotStatus.equals("ON") && waitingForProxy) {
+                    // Reset the waiting for proxy status.
+                    waitingForProxy = false;
 
-                // Reset the image URL variable.
-                downloadImageUrl = "";
-                break;
-        }
-    }
+                    // Get a handle for the waiting for proxy dialog.
+                    DialogFragment waitingForProxyDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.waiting_for_proxy_dialog));
 
-    @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);
+                    // Dismiss the waiting for proxy dialog if it is displayed.
+                    if (waitingForProxyDialogFragment != null) {
+                        waitingForProxyDialogFragment.dismiss();
+                    }
 
-            // Parse `imageUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
+                    // Reload existing URLs and load any URLs that are waiting for the proxy.
+                    for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                        // Get the WebView tab fragment.
+                        WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // Get a handle for the cookie manager.
-            CookieManager cookieManager = CookieManager.getInstance();
+                        // Get the fragment view.
+                        View fragmentView = webViewTabFragment.getView();
 
-            // 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);
+                        // Only process 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);
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
-            }
+                            // Get the waiting for proxy URL string.
+                            String waitingForProxyUrlString = nestedScrollWebView.getWaitingForProxyUrlString();
 
-            // Get the file name from the dialog fragment.
-            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
-            String imageName = downloadImageNameEditText.getText().toString();
+                            // Load the pending URL if it exists.
+                            if (!waitingForProxyUrlString.isEmpty()) {  // A URL is waiting to be loaded.
+                                // Load the URL.
+                                loadUrl(nestedScrollWebView, waitingForProxyUrlString);
 
-            // 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);
+                                // Reset the waiting for proxy URL string.
+                                nestedScrollWebView.resetWaitingForProxyUrlString();
+                            } else {  // No URL is waiting to be loaded.
+                                // Reload the existing URL.
+                                nestedScrollWebView.reload();
+                            }
+                        }
+                    }
+                }
             }
+        };
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+        // Register the Orbot status broadcast receiver 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 0 based.
+        Menu navigationMenu = navigationView.getMenu();
+        MenuItem navigationBackMenuItem = navigationMenu.getItem(2);
+        MenuItem navigationForwardMenuItem = navigationMenu.getItem(3);
+        MenuItem navigationHistoryMenuItem = navigationMenu.getItem(4);
+        MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
 
-            // 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);
+
+                // 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();
 
-            // Get a handle for the cookie manager.
-            CookieManager cookieManager = CookieManager.getInstance();
+                    // Create a runnable to select the tab.
+                    Runnable selectTabRunnable = () -> {
+                        // Get a handle for the tab.
+                        TabLayout.Tab tab = tabLayout.getTabAt(position);
 
-            // 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);
+                        // Assert that the tab is not null.
+                        assert tab != null;
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
-            }
+                        // Select the tab.
+                        tab.select();
+                    };
 
-            // 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 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);
-
-            // 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 onTextChanged(CharSequence s, int start, int before, int count) {
+                // Do nothing.
             }
-        } 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 = "";
+            @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());
+                }
             }
+        });
 
-            // Add the base search URL.
-            url = searchURL + 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);
 
-        // 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();
+                // Consume the event.
+                return true;
+            } else {  // A different key was pressed.
+                // Do not consume the event.
+                return false;
+            }
+        });
 
-        // Make it so.
-        loadUrl(url);
-    }
+        // Implement swipe to refresh.
+        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
 
-    private void loadUrl(String url) {
-        // Apply the domain settings.
-        applyDomainSettings(currentWebView, url, true, false);
+        // Store the default progress view offsets for use later in `initializeWebView()`.
+        defaultProgressViewStartOffset = swipeRefreshLayout.getProgressViewStartOffset();
+        defaultProgressViewEndOffset = swipeRefreshLayout.getProgressViewEndOffset();
 
-        // Load the URL.
-        currentWebView.loadUrl(url, customHeaders);
-    }
+        // 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);
+        }
 
-    public void findPreviousOnPage(View view) {
-        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
-        currentWebView.findNext(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));
 
-    public void findNextOnPage(View view) {
-        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
-        currentWebView.findNext(true);
-    }
+        // 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);
+
+        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
+        currentBookmarksFolder = "";
 
-    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);
+        // Load the home folder, which is `""` in the database.
+        loadBookmarksFolder();
 
-        // Delete the contents of `find_on_page_edittext`.
-        findOnPageEditText.setText(null);
+        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;
 
-        // Clear the highlighted phrases if the WebView is not null.
-        if (currentWebView != null) {
-            currentWebView.clearMatches();
-        }
+            // Get the bookmark cursor for this ID.
+            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseId);
 
-        // Hide the find on page linear layout.
-        findOnPageLinearLayout.setVisibility(View.GONE);
+            // Move the bookmark cursor to the first row.
+            bookmarkCursor.moveToFirst();
 
-        // Show the toolbar.
-        toolbar.setVisibility(View.VISIBLE);
+            // Act upon the bookmark according to the type.
+            if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
+                // Store the new folder name in `currentBookmarksFolder`.
+                currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
-        // Get a handle for the input method manager.
-        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+                // Load the new folder.
+                loadBookmarksFolder();
+            } else {  // The selected bookmark is not a folder.
+                // Load the bookmark URL.
+                loadUrl(currentWebView, bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
 
-        // Remove the lint warning below that the input method manager might be null.
-        assert inputMethodManager != null;
+                // Close the bookmarks drawer.
+                drawerLayout.closeDrawer(GravityCompat.END);
+            }
 
-        // Hide the keyboard.
-        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
-    }
+            // Close the `Cursor`.
+            bookmarkCursor.close();
+        });
 
-    private void applyAppSettings() {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
+            // Convert the database ID from `long` to `int`.
+            int databaseId = (int) id;
 
-        // 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);
+            // Find out if the selected bookmark is a folder.
+            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
 
-        // 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);
+            if (isFolder) {
+                // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
+                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
-        // Remove the incorrect lint warning below that the action bar might be null.
-        assert actionBar != null;
+                // Instantiate the edit folder bookmark dialog.
+                DialogFragment editBookmarkFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
 
-        // Apply the proxy through Orbot settings.
-        applyProxyThroughOrbot(false);
+                // Show the edit folder bookmark dialog.
+                editBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.edit_folder));
+            } else {
+                // Get the bookmark cursor for this ID.
+                Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseId);
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
+                // Move the bookmark cursor to the first row.
+                bookmarkCursor.moveToFirst();
 
-        // 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();
+                // Load the bookmark in a new tab but do not switch to the tab or close the drawer.
+                addNewTab(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)), false);
+            }
 
-        // 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);
+            // Consume the event.
+            return true;
+        });
 
-            // Expand the app bar if it is currently collapsed.
-            appBarLayout.setExpanded(true);
-        }
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-        // Apply the modified layout parameters.
-        swipeRefreshLayout.setLayoutParams(swipeRefreshLayoutParams);
-        toolbar.setLayoutParams(toolbarLayoutParams);
-        findOnPageLinearLayout.setLayoutParams(findOnPageLayoutParams);
-        tabsLinearLayout.setLayoutParams(tabsLayoutParams);
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-        // 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);
+        // 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 fragment view.
-            View fragmentView = webViewTabFragment.getView();
+        // The drawer listener is used to update the navigation menu.
+        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
+            @Override
+            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
+            }
 
-            // 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);
+            @Override
+            public void onDrawerOpened(@NonNull View drawerView) {
+            }
 
-                // Set the app bar scrolling.
-                nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
+            @Override
+            public void onDrawerClosed(@NonNull View drawerView) {
             }
-        }
 
-        // 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);
+            @Override
+            public void onDrawerStateChanged(int newState) {
+                if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
+                    // Get handles for the drawer headers.
+                    TextView navigationHeaderTextView = findViewById(R.id.navigationText);
+                    TextView bookmarksHeaderTextView = findViewById(R.id.bookmarks_title_textview);
 
-                // Hide the action bar.
-                actionBar.hide();
-            } else {
-                // Show the tab linear layout.
-                tabsLinearLayout.setVisibility(View.VISIBLE);
+                    // Apply the navigation header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
+                    if (navigationHeaderTextView != null) {
+                        navigationHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
+                    }
 
-                // Show the action bar.
-                actionBar.show();
-            }
+                    // 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);
+                    }
 
-            // Hide the banner ad in the free flavor.
-            if (BuildConfig.FLAVOR.contentEquals("free")) {
-                AdHelper.hideAd(findViewById(R.id.adview));
+                    // 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));
+
+                        // Hide the keyboard (if displayed).
+                        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+                    }
+
+                    // Clear the focus from from the URL text box and the WebView.  This removes any text selection markers and context menus, which otherwise draw above the open drawers.
+                    urlEditText.clearFocus();
+                    currentWebView.clearFocus();
+                }
             }
+        });
 
-            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
-            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+        // 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 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;
+        // 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 tab linear layout.
-            tabsLinearLayout.setVisibility(View.VISIBLE);
+        // Get a handle for the WebView.
+        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
 
-            // Show the action bar.
-            actionBar.show();
+        // Store the default user agent.
+        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
 
-            // 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));
-            }
+        // Destroy the bare WebView.
+        bareWebView.destroy();
+    }
 
-            // Remove the `SYSTEM_UI` flags from the root frame layout.
-            rootFrameLayout.setSystemUiVisibility(0);
+    @Override
+    public void navigateHistory(String url, int steps) {
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, false, false);
 
-            // Add the translucent status flag.
-            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-        }
+        // Load the history entry.
+        currentWebView.goBackOrForward(steps);
     }
 
+    @Override
+    public void pinnedErrorGoBack() {
+        // Get the current web back forward list.
+        WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
+
+        // Get the previous entry URL.
+        String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
+
+        // 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")
@@ -3201,6 +4011,9 @@ 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);
 
@@ -3212,8 +4025,8 @@ 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);
 
@@ -3319,8 +4132,9 @@ 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();
@@ -3346,15 +4160,16 @@ 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);
@@ -3362,6 +4177,7 @@ 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));
@@ -3404,17 +4220,17 @@ 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;
@@ -3445,66 +4261,68 @@ 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.
+                try {  // Try the specified font size to see if it is valid.
+                    if (fontSize == 0) {  // Apply the default font size.
+                            // Try to set the font size from the value in the app settings.
+                            nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+                    } else {  // Apply the font size from domain settings.
+                        nestedScrollWebView.getSettings().setTextZoom(fontSize);
+                    }
+                } catch (Exception exception) {  // The specified font size is invalid
+                    // Set the font size to be 100%
+                    nestedScrollWebView.getSettings().setTextZoom(100);
+                }
+
+                // 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;
 
-                // 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]);
-                        }
+                        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);
 
@@ -3512,7 +4330,7 @@ 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);
 
@@ -3520,7 +4338,7 @@ 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);
 
@@ -3528,17 +4346,32 @@ 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;
                 }
@@ -3556,11 +4389,12 @@ 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));
 
@@ -3573,9 +4407,17 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     nestedScrollWebView.getSettings().setJavaScriptEnabled(defaultJavaScriptEnabled);
                 }
 
-                // Apply the default settings.
+                // Apply the default first-party cookie setting.
                 cookieManager.setAcceptCookie(nestedScrollWebView.getAcceptFirstPartyCookies());
-                nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+
+                // Apply the default font size setting.
+                try {
+                    // Try to set the font size from the value in the app settings.
+                    nestedScrollWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
+                } catch (Exception exception) {
+                    // If the app settings value is invalid, set the font size to 100%.
+                    nestedScrollWebView.getSettings().setTextZoom(100);
+                }
 
                 // Apply the form data setting if the API < 26.
                 if (Build.VERSION.SDK_INT < 26) {
@@ -3596,35 +4438,34 @@ 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);
 
@@ -3648,92 +4489,129 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         return !nestedScrollWebView.getSettings().getUserAgentString().equals(initialUserAgent);
     }
 
-    private void applyProxyThroughOrbot(boolean reloadWebsite) {
+    private void applyProxy(boolean reloadWebViews) {
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Get the search and theme preferences.
-        String torSearchString = sharedPreferences.getString("tor_search", getString(R.string.tor_search_default_value));
-        String torSearchCustomUrlString = sharedPreferences.getString("tor_search_custom_url", getString(R.string.tor_search_custom_url_default_value));
-        String searchString = sharedPreferences.getString("search", getString(R.string.search_default_value));
-        String searchCustomUrlString = sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value));
+        // Get the theme preferences.
         boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
         // Get a handle for the app bar layout.
         AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
 
-        // Set the homepage, search, and proxy options.
-        if (proxyThroughOrbot) {  // Set the Tor options.
-            // Set the search URL.
-            if (torSearchString.equals("Custom URL")) {  // Get the custom URL string.
-                searchURL = torSearchCustomUrlString;
-            } else {  // Use the string from the pre-built list.
-                searchURL = torSearchString;
-            }
+        // Set the proxy according to the mode.  `this` refers to the current activity where an alert dialog might be displayed.
+        ProxyHelper.setProxy(getApplicationContext(), appBarLayout, proxyMode);
 
-            // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
+        // Reset the waiting for proxy tracker.
+        waitingForProxy = false;
 
-            // Set the app bar background to indicate proxying through Orbot is enabled.
-            if (darkTheme) {
-                appBarLayout.setBackgroundResource(R.color.dark_blue_30);
-            } else {
-                appBarLayout.setBackgroundResource(R.color.blue_50);
-            }
+        // Update the user interface and reload the WebViews if requested.
+        switch (proxyMode) {
+            case ProxyHelper.NONE:
+                // Set the default app bar layout background.
+                if (darkTheme) {
+                    appBarLayout.setBackgroundResource(R.color.gray_900);
+                } else {
+                    appBarLayout.setBackgroundResource(R.color.gray_100);
+                }
+                break;
 
-            // Check to see if Orbot is ready.
-            if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
-                // Set `waitingForOrbot`.
-                waitingForOrbot = true;
+            case ProxyHelper.TOR:
+                // Set the app bar background to indicate proxying through Orbot is enabled.
+                if (darkTheme) {
+                    appBarLayout.setBackgroundResource(R.color.dark_blue_30);
+                } else {
+                    appBarLayout.setBackgroundResource(R.color.blue_50);
+                }
 
-                // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
-                currentWebView.getSettings().setUseWideViewPort(false);
+                // Check to see if Orbot is installed.
+                try {
+                    // Get the package manager.
+                    PackageManager packageManager = getPackageManager();
 
-                // 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);
-            } else if (reloadWebsite) {  // Orbot is ready and the website should be reloaded.
-                // Reload the website.
-                currentWebView.reload();
-            }
-        } else {  // Set the non-Tor options.
-            // Set the search URL.
-            if (searchString.equals("Custom URL")) {  // Get the custom URL string.
-                searchURL = searchCustomUrlString;
-            } else {  // Use the string from the pre-built list.
-                searchURL = searchString;
-            }
+                    // Check to see if Orbot is in the list.  This will throw an error and drop to the catch section if it isn't installed.
+                    packageManager.getPackageInfo("org.torproject.android", 0);
 
-            // Reset the proxy to default.  The host is `""` and the port is `"0"`.
-            OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
+                    // Check to see if the proxy is ready.
+                    if (!orbotStatus.equals("ON")) {  // Orbot is not ready.
+                        // Set the waiting for proxy status.
+                        waitingForProxy = true;
 
-            // Set the default app bar layout background.
-            if (darkTheme) {
-                appBarLayout.setBackgroundResource(R.color.gray_900);
-            } else {
-                appBarLayout.setBackgroundResource(R.color.gray_100);
-            }
+                        // Show the waiting for proxy dialog if it isn't already displayed.
+                        if (getSupportFragmentManager().findFragmentByTag(getString(R.string.waiting_for_proxy_dialog)) == null) {
+                            // Get a handle for the waiting for proxy alert dialog.
+                            DialogFragment waitingForProxyDialogFragment = new WaitingForProxyDialog();
 
-            // Reset `waitingForOrbot.
-            waitingForOrbot = false;
+                            // Display the waiting for proxy alert dialog.
+                            waitingForProxyDialogFragment.show(getSupportFragmentManager(), getString(R.string.waiting_for_proxy_dialog));
+                        }
+                    }
+                } catch (PackageManager.NameNotFoundException exception) {  // Orbot is not installed.
+                    // Show the Orbot not installed dialog if it is not already displayed.
+                    if (getSupportFragmentManager().findFragmentByTag(getString(R.string.proxy_not_installed_dialog)) == null) {
+                        // Get a handle for the Orbot not installed alert dialog.
+                        DialogFragment orbotNotInstalledDialogFragment = ProxyNotInstalledDialog.displayDialog(proxyMode);
+
+                        // Display the Orbot not installed alert dialog.
+                        orbotNotInstalledDialogFragment.show(getSupportFragmentManager(), getString(R.string.proxy_not_installed_dialog));
+                    }
+                }
+                break;
+
+            case ProxyHelper.I2P:
+                // Set the app bar background to indicate proxying through Orbot is enabled.
+                if (darkTheme) {
+                    appBarLayout.setBackgroundResource(R.color.dark_blue_30);
+                } else {
+                    appBarLayout.setBackgroundResource(R.color.blue_50);
+                }
+
+                // Check to see if I2P is installed.
+                try {
+                    // Get the package manager.
+                    PackageManager packageManager = getPackageManager();
+
+                    // Check to see if I2P is in the list.  This will throw an error and drop to the catch section if it isn't installed.
+                    packageManager.getPackageInfo("org.torproject.android", 0);
+                } catch (PackageManager.NameNotFoundException exception) {  // I2P is not installed.
+                    // Sow the I2P not installed dialog if it is not already displayed.
+                    if (getSupportFragmentManager().findFragmentByTag(getString(R.string.proxy_not_installed_dialog)) == null) {
+                        // Get a handle for the waiting for proxy alert dialog.
+                        DialogFragment i2pNotInstalledDialogFragment = ProxyNotInstalledDialog.displayDialog(proxyMode);
+
+                        // Display the I2P not installed alert dialog.
+                        i2pNotInstalledDialogFragment.show(getSupportFragmentManager(), getString(R.string.proxy_not_installed_dialog));
+                    }
+                }
+                break;
+
+            case ProxyHelper.CUSTOM:
+                // Set the app bar background to indicate proxying through Orbot is enabled.
+                if (darkTheme) {
+                    appBarLayout.setBackgroundResource(R.color.dark_blue_30);
+                } else {
+                    appBarLayout.setBackgroundResource(R.color.blue_50);
+                }
+                break;
+        }
 
-            // Reload the WebViews if requested.
-            if (reloadWebsite) {
-                // Reload the WebViews.
-                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-                    // Get the WebView tab fragment.
-                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+        // Reload the WebViews if requested and not waiting for the proxy.
+        if (reloadWebViews && !waitingForProxy) {
+            // Reload the WebViews.
+            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();
+                // Get the fragment view.
+                View fragmentView = webViewTabFragment.getView();
 
-                    // 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);
+                // 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 WebView.
-                        nestedScrollWebView.reload();
-                    }
+                    // Reload the WebView.
+                    nestedScrollWebView.reload();
                 }
             }
         }
@@ -3829,12 +4707,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             String urlString = urlEditText.getText().toString();
 
             // Highlight the URL according to the protocol.
-            if (urlString.startsWith("file://")) {  // This is a file URL.
-                // De-emphasize only the protocol.
-                urlEditText.getText().setSpan(initialGrayColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
-            } else if (urlString.startsWith("content://")) {
-                // De-emphasize only the protocol.
-                urlEditText.getText().setSpan(initialGrayColorSpan, 0, 10, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+            if (urlString.startsWith("file://") || urlString.startsWith("content://")) {  // This is a file or content URL.
+                // De-emphasize everything before the file name.
+                urlEditText.getText().setSpan(initialGrayColorSpan, 0, urlString.lastIndexOf("/") + 1,Spanned.SPAN_INCLUSIVE_INCLUSIVE);
             } else {  // This is a web URL.
                 // Get the index of the `/` immediately after the domain name.
                 int endOfDomainName = urlString.indexOf("/", (urlString.indexOf("//") + 2));
@@ -3950,8 +4825,13 @@ 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) {
@@ -3964,11 +4844,86 @@ 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);
@@ -3989,7 +4944,7 @@ 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) {
@@ -4215,7 +5170,7 @@ 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.
@@ -4225,19 +5180,14 @@ 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);
@@ -4301,11 +5251,23 @@ 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);
@@ -4326,7 +5288,7 @@ 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;
@@ -4334,9 +5296,6 @@ 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();
 
@@ -4354,9 +5313,6 @@ 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);
 
@@ -4458,14 +5414,14 @@ 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);
@@ -4478,7 +5434,7 @@ 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;
 
@@ -4491,11 +5447,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         downloadLocationPermissionDialogFragment.show(getSupportFragmentManager(), 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);
+                        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, PERMISSION_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(url, contentDisposition, contentLength);
+                    DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, contentDisposition, contentLength);
 
                     // Show the download file alert dialog.
                     downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
@@ -4526,13 +5482,26 @@ 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.
@@ -4637,8 +5606,14 @@ 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);
+                    }
                 }
             }
 
@@ -4686,6 +5661,9 @@ 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.
@@ -4694,6 +5672,9 @@ 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;
 
@@ -4762,8 +5743,8 @@ 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, BROWSE_FILE_UPLOAD_REQUEST_CODE);
                 }
                 return true;
             }
@@ -4774,6 +5755,9 @@ 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);
@@ -4847,6 +5831,28 @@ 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);
 
@@ -4854,7 +5860,7 @@ 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(5);
+                MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
 
                 // 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()));
@@ -4907,7 +5913,7 @@ 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);
@@ -4933,20 +5939,60 @@ 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) {
@@ -4958,14 +6004,14 @@ 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]});
@@ -4976,18 +6022,18 @@ 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) {
@@ -4999,33 +6045,33 @@ 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) {
@@ -5037,14 +6083,14 @@ 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]};
                     }
@@ -5053,10 +6099,10 @@ 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]});
@@ -5083,17 +6129,17 @@ 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]});
@@ -5120,7 +6166,7 @@ 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]};
@@ -5131,7 +6177,7 @@ 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.
@@ -5194,64 +6240,47 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // Hide the keyboard.
                 inputMethodManager.hideSoftInputFromWindow(nestedScrollWebView.getWindowToken(), 0);
 
-                // Check to see if Privacy Browser is waiting on Orbot.
-                if (!waitingForOrbot) {  // Process the URL.
-                    // Get the current page position.
-                    int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
-
-                    // Update the URL text bar if the page is currently selected.
-                    if (tabLayout.getSelectedTabPosition() == currentPagePosition) {
-                        // Clear the focus from the URL edit text.
-                        urlEditText.clearFocus();
-
-                        // Display the formatted URL text.
-                        urlEditText.setText(url);
-
-                        // Apply text highlighting to `urlTextBox`.
-                        highlightUrlText();
-                    }
+                // Get the current page position.
+                int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                    // Reset the list of host IP addresses.
-                    nestedScrollWebView.clearCurrentIpAddresses();
+                // Update the URL text bar if the page is currently selected.
+                if (tabLayout.getSelectedTabPosition() == currentPagePosition) {
+                    // Clear the focus from the URL edit text.
+                    urlEditText.clearFocus();
 
-                    // Get a URI for the current URL.
-                    Uri currentUri = Uri.parse(url);
+                    // Display the formatted URL text.
+                    urlEditText.setText(url);
 
-                    // Get the IP addresses for the host.
-                    new GetHostIpAddresses(activity, getSupportFragmentManager(), nestedScrollWebView).execute(currentUri.getHost());
+                    // Apply text highlighting to `urlTextBox`.
+                    highlightUrlText();
+                }
 
-                    // Apply any custom domain settings if the URL was loaded by navigating history.
-                    if (nestedScrollWebView.getNavigatingHistory()) {
-                        // Reset navigating history.
-                        nestedScrollWebView.setNavigatingHistory(false);
+                // Reset the list of host IP addresses.
+                nestedScrollWebView.clearCurrentIpAddresses();
 
-                        // Apply the domain settings.
-                        boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
+                // Get a URI for the current URL.
+                Uri currentUri = Uri.parse(url);
 
-                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
-                        if (userAgentChanged) {
-                            loadUrl(url);
-                        }
-                    }
+                // Get the IP addresses for the host.
+                new GetHostIpAddresses(activity, getSupportFragmentManager(), nestedScrollWebView).execute(currentUri.getHost());
 
-                    // Replace Refresh with Stop if the options menu has been created.  (The 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);
+                // 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);
 
-                        // Set the title.
-                        refreshMenuItem.setTitle(R.string.stop);
+                    // Set the title.
+                    refreshMenuItem.setTitle(R.string.stop);
 
-                        // Get the app bar and theme preferences.
-                        boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+                    // Get the app bar and theme preferences.
+                    boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
 
-                        // 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);
-                            }
+                    // 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);
                         }
                     }
                 }
@@ -5259,12 +6288,6 @@ 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();
@@ -5317,65 +6340,80 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     }
                 }
 
-                // Update the URL text box and apply domain settings if not waiting on Orbot.
-                if (!waitingForOrbot) {
-                    // Get the current page position.
-                    int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
+                // Get the current page position.
+                int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                    // Check the current website information against any pinned domain information if the current IP addresses have been loaded.
-                    if ((nestedScrollWebView.hasPinnedSslCertificate() || nestedScrollWebView.hasPinnedIpAddresses()) && nestedScrollWebView.hasCurrentIpAddresses() &&
-                            !nestedScrollWebView.ignorePinnedDomainInformation()) {
-                        CheckPinnedMismatchHelper.checkPinnedMismatch(getSupportFragmentManager(), nestedScrollWebView);
-                    }
+                // Check the current website information against any pinned domain information if the current IP addresses have been loaded.
+                if ((nestedScrollWebView.hasPinnedSslCertificate() || nestedScrollWebView.hasPinnedIpAddresses()) && nestedScrollWebView.hasCurrentIpAddresses() &&
+                        !nestedScrollWebView.ignorePinnedDomainInformation()) {
+                    CheckPinnedMismatchHelper.checkPinnedMismatch(getSupportFragmentManager(), nestedScrollWebView);
+                }
+
+                // Get the current URL from the nested scroll WebView.  This is more accurate than using the URL passed into the method, which is sometimes not the final one.
+                String currentUrl = nestedScrollWebView.getUrl();
+
+                // Get the current tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPagePosition);
+
+                // Update the URL text bar if the page is currently selected and the user is not currently typing in the URL edit text.
+                // Crash records show that, in some crazy way, it is possible for the current URL to be blank at this point.
+                // Probably some sort of race condition when Privacy Browser is being resumed.
+                if ((tabLayout.getSelectedTabPosition() == currentPagePosition) && !urlEditText.hasFocus() && (currentUrl != null)) {
+                    // Check to see if the URL is `about:blank`.
+                    if (currentUrl.equals("about:blank")) {  // The WebView is blank.
+                        // Display the hint in the URL edit text.
+                        urlEditText.setText("");
+
+                        // Request focus for the URL text box.
+                        urlEditText.requestFocus();
+
+                        // Display the keyboard.
+                        inputMethodManager.showSoftInput(urlEditText, 0);
 
-                    // 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();
+                        // Apply the domain settings.  This clears any settings from the previous domain.
+                        applyDomainSettings(nestedScrollWebView, "", true, false);
 
-                    // Update the URL text bar if the page is currently selected and the user is not currently typing in the URL edit text.
-                    // Crash records show that, in some crazy way, it is possible for the current URL to be blank at this point.
-                    // Probably some sort of race condition when Privacy Browser is being resumed.
-                    if ((tabLayout.getSelectedTabPosition() == currentPagePosition) && !urlEditText.hasFocus() && (currentUrl != null)) {
-                        // Check to see if the URL is `about:blank`.
-                        if (currentUrl.equals("about:blank")) {  // The WebView is blank.
-                            // Display the hint in the URL edit text.
-                            urlEditText.setText("");
+                        // 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();
 
-                            // Request focus for the URL text box.
-                            urlEditText.requestFocus();
+                            // Remove the incorrect warning below that the current tab view might be null.
+                            assert tabView != null;
 
-                            // Display the keyboard.
-                            inputMethodManager.showSoftInput(urlEditText, 0);
+                            // Get the title text view from the tab.
+                            TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
 
-                            // Hide the WebView, which causes the default background color to be displayed according to the theme.
-                            nestedScrollWebView.setVisibility(View.INVISIBLE);
+                            // Set the title as the tab text.
+                            tabTitleTextView.setText(R.string.new_tab);
+                        }
+                    } else {  // The WebView has loaded a webpage.
+                        // 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 the domain settings.  This clears any settings from the previous domain.
-                            applyDomainSettings(nestedScrollWebView, "", true, false);
-                        } 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);
+                            urlEditText.setText(sanitizedUrl);
 
                             // Apply text highlighting to the URL.
                             highlightUrlText();
                         }
-                    }
-
-                    // Get the current tab.
-                    TabLayout.Tab tab = tabLayout.getTabAt(currentPagePosition);
 
-                    // 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());
+                        }
                     }
                 }
             }
@@ -5435,42 +6473,67 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Apply the app settings from the shared preferences.
             applyAppSettings();
 
-            // Load the website if not waiting for Orbot to connect.
-            if (!waitingForOrbot) {
-                // Get the intent that started the app.
-                Intent launchingIntent = getIntent();
+            // Initialize the URL to load string.
+            String urlToLoadString;
 
-                // Get the information from the intent.
-                String launchingIntentAction = launchingIntent.getAction();
-                Uri launchingIntentUriData = launchingIntent.getData();
+            // Get the intent that started the app.
+            Intent launchingIntent = getIntent();
 
-                // 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 information from the intent.
+            String launchingIntentAction = launchingIntent.getAction();
+            Uri launchingIntentUriData = launchingIntent.getData();
 
-                    // Sanitize the search input and convert it to a search.
-                    try {
-                        encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
-                    } catch (UnsupportedEncodingException exception) {
-                        encodedUrlString = "";
-                    }
+            // Parse the launching intent URL.
+            if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {  // The intent contains a search string.
+                // 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(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                } catch (UnsupportedEncodingException exception) {
+                    encodedUrlString = "";
                 }
+
+                // Store the web search as the URL to load.
+                urlToLoadString = searchURL + encodedUrlString;
+            } else if (launchingIntentUriData != null){  // The intent contains a URL.
+                // Store the URL.
+                urlToLoadString = launchingIntentUriData.toString();
+            } else {  // The is no URL in the intent.
+                // Store the homepage to be loaded.
+                urlToLoadString = sharedPreferences.getString("homepage", getString(R.string.homepage_default_value));
+            }
+
+            // Load the website if not waiting for the proxy.
+            if (waitingForProxy) {  // Store the URL to be loaded in the Nested Scroll WebView.
+                nestedScrollWebView.setWaitingForProxyUrlString(urlToLoadString);
+            } else {  // Load the URL.
+                loadUrl(nestedScrollWebView, urlToLoadString);
+            }
+        } 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);
             }
         }
     }