]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java
Add opening bookmarks in new tab. https://redmine.stoutner.com/issues/469
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
index 4050a01faca5283b636b76d9be83c0137594b9bb..f4c51bb6acabaf071e363f34658b6058866cc152 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;
@@ -96,6 +98,7 @@ import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
 import androidx.core.view.GravityCompat;
@@ -105,6 +108,7 @@ import androidx.fragment.app.FragmentManager;
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 import androidx.viewpager.widget.ViewPager;
 
+import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.navigation.NavigationView;
 import com.google.android.material.snackbar.Snackbar;
@@ -114,6 +118,8 @@ import com.stoutner.privacybrowser.BuildConfig;
 import com.stoutner.privacybrowser.R;
 import com.stoutner.privacybrowser.adapters.WebViewPagerAdapter;
 import com.stoutner.privacybrowser.asynctasks.GetHostIpAddresses;
+import com.stoutner.privacybrowser.asynctasks.PopulateBlocklists;
+import com.stoutner.privacybrowser.asynctasks.SaveWebpageImage;
 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
@@ -125,15 +131,18 @@ import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
 import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
+import com.stoutner.privacybrowser.dialogs.SaveWebpageImageDialog;
 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
+import com.stoutner.privacybrowser.dialogs.StoragePermissionDialog;
 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
 import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
 import com.stoutner.privacybrowser.helpers.AdHelper;
-import com.stoutner.privacybrowser.helpers.BlockListHelper;
+import com.stoutner.privacybrowser.helpers.BlocklistHelper;
 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
 import com.stoutner.privacybrowser.helpers.CheckPinnedMismatchHelper;
 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
+import com.stoutner.privacybrowser.helpers.FileNameHelper;
 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
 import com.stoutner.privacybrowser.views.NestedScrollWebView;
 
@@ -154,17 +163,11 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
-// TODO.  Store up reloads for tabs that are not visible.
-// TODO.  New tabs are white in dark mode.
-// TODO.  Hide the tabs in full screen mode.
-// TODO.  Find on page.
-// TODO.  Use TabLayout.setScrollPosition to scroll to new tabs.
-
 // 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, PinnedMismatchDialog.PinnedMismatchListener,
-        UrlHistoryDialog.UrlHistoryListener {
+        EditBookmarkFolderDialog.EditBookmarkFolderListener, NavigationView.OnNavigationItemSelectedListener, PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveWebpageImageDialog.SaveWebpageImageListener,
+        StoragePermissionDialog.StoragePermissionDialogListener, UrlHistoryDialog.NavigateHistoryListener, WebViewTabFragment.NewTabListener {
 
     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
     public static String orbotStatus;
@@ -172,9 +175,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
     public static WebViewPagerAdapter webViewPagerAdapter;
 
-    // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is used in `onRestart()`
-    public static boolean reloadOnRestart;
-
     // The load URL on restart variables are public static so they can be accessed from `BookmarksActivity`.  They are used in `onRestart()`.
     public static boolean loadUrlOnRestart;
     public static String urlToLoadOnRestart;
@@ -194,6 +194,9 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
 
+    // Start activity for result request codes.
+    private final int FILE_UPLOAD_REQUEST_CODE = 0;
+    public final static int BROWSE_SAVE_WEBPAGE_IMAGE_REQUEST_CODE = 1;
 
 
     // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
@@ -209,11 +212,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // The options menu is set in `onCreateOptionsMenu()` and used in `onOptionsItemSelected()`, `updatePrivacyIcons()`, and `initializeWebView()`.
     private Menu optionsMenu;
 
-    // The blocklists are populated in `onCreate()` and accessed from `initializeWebView()`.
+    // The blocklists are populated in `finishedPopulatingBlocklists()` and accessed from `initializeWebView()`.
     private ArrayList<List<String[]>> easyList;
     private ArrayList<List<String[]>> easyPrivacy;
     private ArrayList<List<String[]>> fanboysAnnoyanceList;
     private ArrayList<List<String[]>> fanboysSocialList;
+    private ArrayList<List<String[]>> ultraList;
     private ArrayList<List<String[]>> ultraPrivacy;
 
     // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
@@ -231,8 +235,12 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
     private boolean inFullScreenBrowsingMode;
 
-    // Hide app bar is used in `applyAppSettings()` and `initializeWebView()`.
+    // The app bar trackers are set in `applyAppSettings()` and used in `initializeWebView()`.
     private boolean hideAppBar;
+    private boolean scrollAppBar;
+
+    // The loading new intent tracker is set in `onNewIntent()` and used in `setCurrentWebView()`.
+    private boolean loadingNewIntent;
 
     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
     private boolean reapplyDomainSettingsOnRestart;
@@ -278,6 +286,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
     private ValueCallback<Uri[]> fileChooserCallback;
 
+    // The default progress view offsets are set in `onCreate()` and used in `initializeWebView()`.
+    private int defaultProgressViewStartOffset;
+    private int defaultProgressViewEndOffset;
+
+    // The swipe refresh layout top padding is used when exiting full screen browsing mode.  It is used in an inner class in `initializeWebView()`.
+    private int swipeRefreshLayoutPaddingTop;
+
+    // The URL sanitizers are set in `applyAppSettings()` and used in `sanitizeUrl()`.
+    private boolean sanitizeGoogleAnalytics;
+    private boolean sanitizeFacebookClickIds;
+    private boolean sanitizeTwitterAmpRedirects;
+
     // The download strings are used in `onCreate()`, `onRequestPermissionResult()` and `initializeWebView()`.
     private String downloadUrl;
     private String downloadContentDisposition;
@@ -286,14 +306,26 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
     private String downloadImageUrl;
 
-    // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, `onRequestPermissionResult()`, and `initializeWebView()`.
+    // The save website image file path string is used in `onSaveWebpageImage()` and `onRequestPermissionResult()`
+    private String saveWebsiteImageFilePath;
+
+    // The permission result request codes are used in `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, `onRequestPermissionResult()`, `onSaveWebpageImage()`,
+    // `onCloseStoragePermissionDialog()`, and `initializeWebView()`.
     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
+    private final int SAVE_WEBPAGE_IMAGE_REQUEST_CODE = 3;
 
     @Override
     // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
     @SuppressLint("ClickableViewAccessibility")
     protected void onCreate(Bundle savedInstanceState) {
+        if (Build.VERSION.SDK_INT >= 21) {
+            WebView.enableSlowWholeDocumentDraw();
+        }
+
+        // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
+        PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
+
         // Get a handle for the shared preferences.
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
@@ -319,14 +351,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         // Set the content view.
         setContentView(R.layout.main_framelayout);
 
-        // Get a handle for the input method.
-        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
-
-        // Remove the lint warning below that the input method manager might be null.
-        assert inputMethodManager != null;
-
-        // Get a handle for the toolbar.
+        // Get handles for the views that need to be modified.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
         Toolbar toolbar = findViewById(R.id.toolbar);
+        ViewPager webViewPager = findViewById(R.id.webviewpager);
 
         // Set the action bar.  `SupportActionBar` must be used until the minimum API is >= 21.
         setSupportActionBar(toolbar);
@@ -341,3002 +369,3432 @@ 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();
+                    // 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();
+                }
 
-        // 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 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;
 
-        // 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.
+                    addNewTab(url, true);
+                } else {  // Load the URL in the current tab.
+                    // Make it so.
+                    loadUrl(url);
+                }
 
-        // Listen for touches on the navigation menu.
-        navigationView.setNavigationItemSelectedListener(this);
+                // Get a handle for the drawer layout.
+                DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-        // Get handles for the navigation menu and the back and forward menu items.  The menu is zero-based.
-        Menu navigationMenu = navigationView.getMenu();
-        MenuItem navigationCloseTabMenuItem = navigationMenu.getItem(0);
-        MenuItem navigationBackMenuItem = navigationMenu.getItem(3);
-        MenuItem navigationForwardMenuItem = navigationMenu.getItem(4);
-        MenuItem navigationHistoryMenuItem = navigationMenu.getItem(5);
-        MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
+                // Close the navigation drawer if it is open.
+                if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
+                    drawerLayout.closeDrawer(GravityCompat.START);
+                }
 
-        // Initialize the web view pager adapter.
-        webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
+                // Close the bookmarks drawer if it is open.
+                if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
+                    drawerLayout.closeDrawer(GravityCompat.END);
+                }
+            }
+        }
+    }
 
-        // Set the pager adapter on the web view pager.
-        webViewPager.setAdapter(webViewPagerAdapter);
+    @Override
+    public void onRestart() {
+        // Run the default commands.
+        super.onRestart();
 
-        // Store up to 100 tabs in memory.
-        webViewPager.setOffscreenPageLimit(100);
+        // 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");
 
-        // 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.
-            }
+            // Send the intent to the Orbot package.
+            orbotIntent.setPackage("org.torproject.android");
 
-            @Override
-            public void onPageSelected(int position) {
-                // Set the current WebView.
-                setCurrentWebView(position);
+            // Make it so.
+            sendBroadcast(orbotIntent);
+        }
 
-                // 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.
-                if (tabLayout.getSelectedTabPosition() != position) {
-                    // Get a handle for the corresponding tab.
-                    TabLayout.Tab correspondingTab = tabLayout.getTabAt(position);
+        // Apply the app settings if returning from the Settings activity.
+        if (reapplyAppSettingsOnRestart) {
+            // Reset the reapply app settings on restart tracker.
+            reapplyAppSettingsOnRestart = false;
 
-                    // Assert that the corresponding tab is not null.
-                    assert correspondingTab != null;
+            // Apply the app settings.
+            applyAppSettings();
+        }
 
-                    // Select the corresponding tab.
-                    correspondingTab.select();
-                }
-            }
+        // Apply the domain settings if returning from the settings or domains activity.
+        if (reapplyDomainSettingsOnRestart) {
+            // Reset the reapply domain settings on restart tracker.
+            reapplyDomainSettingsOnRestart = false;
 
-            @Override
-            public void onPageScrollStateChanged(int state) {
-                // Do nothing.
-            }
-        });
+            // 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);
 
-        // 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());
-            }
+                // Get the fragment view.
+                View fragmentView = webViewTabFragment.getView();
 
-            @Override
-            public void onTabUnselected(TabLayout.Tab tab) {
-                // Do nothing.
-            }
+                // 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);
 
-            @Override
-            public void onTabReselected(TabLayout.Tab tab) {
-                // Instantiate the View SSL Certificate dialog.
-                DialogFragment viewSslCertificateDialogFragment = ViewSslCertificateDialog.displayDialog(currentWebView.getWebViewFragmentId());
+                    // Reset the current domain name so the domain settings will be reapplied.
+                    nestedScrollWebView.resetCurrentDomainName();
 
-                // Display the View SSL Certificate dialog.
-                viewSslCertificateDialogFragment.show(getSupportFragmentManager(), getString(R.string.view_ssl_certificate));
+                    // 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);
+                    }
+                }
             }
-        });
+        }
 
-        // Add the first tab.
-        addTab(null);
+        // Load the URL on restart (used when loading a bookmark).
+        if (loadUrlOnRestart) {
+            // Load the specified URL.
+            loadUrl(urlToLoadOnRestart);
 
-        // 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 the load on restart tracker.
+            loadUrlOnRestart = 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 bookmarks drawer if returning from the Bookmarks activity.
+        if (restartFromBookmarksActivity) {
+            // Get a handle for the drawer layout.
+            DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-            // Create a favorite icon byte array output stream.
-            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+            // Close the bookmarks drawer.
+            drawerLayout.closeDrawer(GravityCompat.END);
 
-            // 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 bookmarks drawer.
+            loadBookmarksFolder();
 
-            // Convert the favorite icon byte array stream to a byte array.
-            byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+            // Reset `restartFromBookmarksActivity`.
+            restartFromBookmarksActivity = false;
+        }
 
-            // Create an intent to launch the bookmarks activity.
-            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
+        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
+        updatePrivacyIcons(true);
+    }
 
-            // 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);
-        });
+    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
+    @Override
+    public void onResume() {
+        // Run the default commands.
+        super.onResume();
 
-        // Set the create new bookmark folder FAB to display an alert dialog.
-        createBookmarkFolderFab.setOnClickListener(v -> {
-            // Create a create bookmark folder dialog.
-            DialogFragment createBookmarkFolderDialog = CreateBookmarkFolderDialog.createBookmarkFolder(currentWebView.getFavoriteOrDefaultIcon());
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-            // Show the create bookmark folder dialog.
-            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
-        });
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // 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());
+            // 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);
 
-            // Display the create bookmark dialog.
-            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
-        });
+                // Resume the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.resumeTimers();
 
-        // 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.
+                // Resume the nested scroll WebView.
+                nestedScrollWebView.onResume();
             }
+        }
 
-            @Override
-            public void onTextChanged(CharSequence s, int start, int before, int count) {
-                // Do nothing.
-            }
+        // 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);
 
-            @Override
-            public void afterTextChanged(Editable s) {
-                // Search for the text in `mainWebView`.
-                currentWebView.findAllAsync(findOnPageEditText.getText().toString());
-            }
-        });
+            // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
+            currentWebView.loadData("<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>", "text/html", null);
+        }
 
-        // Set the `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);
+        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
+            // Get a handle for the root frame layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
 
-                // Consume the event.
-                return true;
-            } else {  // A different key was pressed.
-                // Do not consume the event.
-                return false;
-            }
-        });
+            // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-        // Implement swipe to refresh.
-        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
+            /* 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));
+        }
+    }
 
-        // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
-        swipeRefreshLayout.setProgressViewOffset(false, swipeRefreshLayout.getProgressViewStartOffset() - 10, swipeRefreshLayout.getProgressViewEndOffset());
+    @Override
+    public void onPause() {
+        // Run the default commands.
+        super.onPause();
 
-        // 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);
-        }
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 
-        // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
-        drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
-        drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
 
-        // 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);
+            // 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);
 
-        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
-        currentBookmarksFolder = "";
+                // Pause the nested scroll WebView.
+                nestedScrollWebView.onPause();
 
-        // Load the home folder, which is `""` in the database.
-        loadBookmarksFolder();
+                // Pause the nested scroll WebView JavaScript timers.
+                nestedScrollWebView.pauseTimers();
+            }
+        }
 
-        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;
+        // 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));
+        }
+    }
 
-            // Get the bookmark cursor for this ID and move it to the first row.
-            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
-            bookmarkCursor.moveToFirst();
+    @Override
+    public void onDestroy() {
+        // Unregister the Orbot status broadcast receiver.
+        this.unregisterReceiver(orbotStatusBroadcastReceiver);
 
-            // 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));
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
 
-                // 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)));
+        // Run the default commands.
+        super.onDestroy();
+    }
 
-                // Close the bookmarks drawer.
-                drawerLayout.closeDrawer(GravityCompat.END);
-            }
+    @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);
 
-            // Close the `Cursor`.
-            bookmarkCursor.close();
-        });
+        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
+        optionsMenu = menu;
 
-        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
-            // Convert the database ID from `long` to `int`.
-            int databaseId = (int) id;
+        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
+        updatePrivacyIcons(false);
 
-            // Find out if the selected bookmark is a folder.
-            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
+        // 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);
 
-            if (isFolder) {
-                // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
-                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
+        // Only display third-party cookies if API >= 21
+        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 
-                // 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));
-            }
+        // 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);
 
-            // Consume the event.
-            return true;
-        });
+        // 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);
 
-        // Get the status bar pixel size.
-        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
-        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+        // Only show Ad Consent if this is the free flavor.
+        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 
-        // Get the resource density.
-        float screenDensity = getResources().getDisplayMetrics().density;
+        // Get the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // 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 dark theme and app bar preferences..
+        boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-        // The drawer listener is used to update the navigation menu.`
-        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
-            @Override
-            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
-            }
+        // 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);
+        }
 
-            @Override
-            public void onDrawerOpened(@NonNull View drawerView) {
-            }
+        // Replace Refresh with Stop if a URL is already loading.
+        if (currentWebView != null && currentWebView.getProgress() != 100) {
+            // Set the title.
+            refreshMenuItem.setTitle(R.string.stop);
 
-            @Override
-            public void onDrawerClosed(@NonNull View drawerView) {
+            // 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);
+                }
             }
+        }
 
-            @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);
+        // Done.
+        return true;
+    }
 
-                    // Apply the navigation header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
-                    if (navigationHeaderTextView != null) {
-                        navigationHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
-                    }
-
-                    // 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);
-                    }
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        // Get handles for the menu items.
+        MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
+        MenuItem firstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
+        MenuItem thirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
+        MenuItem domStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
+        MenuItem saveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
+        MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
+        MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
+        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
+        MenuItem blocklistsMenuItem = menu.findItem(R.id.blocklists);
+        MenuItem easyListMenuItem = menu.findItem(R.id.easylist);
+        MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
+        MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
+        MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
+        MenuItem ultraListMenuItem = menu.findItem(R.id.ultralist);
+        MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
+        MenuItem blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
+        MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
+        MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
+        MenuItem wideViewportMenuItem = menu.findItem(R.id.wide_viewport);
+        MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
+        MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
+        MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
 
-                    // Update the navigation menu items.
-                    navigationCloseTabMenuItem.setEnabled(tabLayout.getTabCount() > 1);
-                    navigationBackMenuItem.setEnabled(currentWebView.canGoBack());
-                    navigationForwardMenuItem.setEnabled(currentWebView.canGoForward());
-                    navigationHistoryMenuItem.setEnabled((currentWebView.canGoBack() || currentWebView.canGoForward()));
-                    navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-                    // Hide the keyboard (if displayed).
-                    inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+        // Initialize the current user agent string and the font size.
+        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
+        int fontSize = 100;
 
-                    // 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();
-                }
+        // 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 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 the current user agent from the WebView.
+            currentUserAgent = currentWebView.getSettings().getUserAgentString();
 
-        // Get a handle for the WebView.
-        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
+            // Get the current font size from the
+            fontSize = currentWebView.getSettings().getTextZoom();
 
-        // Store the default user agent.
-        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
+            // 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());
 
-        // Destroy the bare WebView.
-        bareWebView.destroy();
-    }
+            // 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));
 
-    @Override
-    protected void onNewIntent(Intent intent) {
-        // Get the information from the intent.
-        String intentAction = intent.getAction();
-        Uri intentUriData = intent.getData();
-
-        // Only process the URI if it contains data.  If the user pressed the desktop icon after the app was already running the URI will be null.
-        if (intentUriData != null) {
-            // Sets the new intent as the activity intent, which replaces the one that originally started the app.
-            setIntent(intent);
-
-            // Add a new tab.
-            addTab(null);
-
-            // Create a URL string.
-            String url;
-
-            // If the intent action is a web search, perform the search.
-            if ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH)) {
-                // Create an encoded URL string.
-                String encodedUrlString;
-
-                // Sanitize the search input and convert it to a search.
-                try {
-                    encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
-                } catch (UnsupportedEncodingException exception) {
-                    encodedUrlString = "";
-                }
+            // 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 status of the menu item checkboxes.
+        firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
+        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
 
-            // 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()) {
+            localStorageDirectoryNumberOfFiles = 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()) {
+            indexedDBDirectoryNumberOfFiles = 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) {
-            // Apply the app settings.
-            applyAppSettings();
+        // Enable Clear Data if any of the submenu items are enabled.
+        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
 
-            // Reload the webpage to handle changes to night mode and displaying of images.
-            if (reloadOnRestart) {
-                // Reload the WebViews.
-                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-                    // Get the WebView tab fragment.
-                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
+        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
 
-                    // Get the fragment view.
-                    View fragmentView = webViewTabFragment.getView();
+        // 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);
+        }
 
-                    // 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);
+        // Instantiate the font size title and the selected font size menu item.
+        String fontSizeTitle;
+        MenuItem selectedFontSizeMenuItem;
 
-                        // Reload the WebView.  This doesn't seem to work if for WebViews that aren't visible.
-                        nestedScrollWebView.reload();
-                    }
-                }
+        // Prepare the font size title and current size menu item.
+        //noinspection DuplicateBranchesInSwitch
+        switch (fontSize) {
+            case 25:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
+                break;
 
-                // Reset `reloadOnRestartBoolean`.
-                reloadOnRestart = false;
-            }
+            case 50:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
+                break;
 
-            // Reset the return from settings flag.
-            reapplyAppSettingsOnRestart = false;
-        }
+            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;
 
-        // TODO apply to all the tabs.
-        // Apply the domain settings if returning from the Domains activity.
-        if (reapplyDomainSettingsOnRestart) {
-            // Reset the current domain name so the domain settings will be reapplied.
-            currentWebView.resetCurrentDomainName();
+            case 100:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                break;
 
-            // Reapply the domain settings.
-            applyDomainSettings(currentWebView, currentWebView.getUrl(), false, true);  // TODO.
+            case 125:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
+                break;
 
-            // Reset the reapply domain settings on restart tracker.
-            reapplyDomainSettingsOnRestart = false;
-        }
+            case 150:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
+                break;
 
-        // Load the URL on restart (used when loading a bookmark.
-        if (loadUrlOnRestart) {
-            // Load the specified URL.
-            loadUrl(urlToLoadOnRestart);
+            case 175:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
+                break;
 
-            // Reset the load on restart tracker.
-            loadUrlOnRestart = false;
+            case 200:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
+                break;
+
+            default:
+                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
+                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
+                break;
         }
 
-        // 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);
+        // Set the font size title and select the current size menu item.
+        fontSizeMenuItem.setTitle(fontSizeTitle);
+        selectedFontSizeMenuItem.setChecked(true);
 
-            // Close the bookmarks drawer.
-            drawerLayout.closeDrawer(GravityCompat.END);
-
-            // Reload the bookmarks drawer.
-            loadBookmarksFolder();
-
-            // Reset `restartFromBookmarksActivity`.
-            restartFromBookmarksActivity = false;
-        }
+        // Run all the other default commands.
+        super.onPrepareOptionsMenu(menu);
 
-        // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
-        updatePrivacyIcons(true);
+        // Display the menu.
+        return true;
     }
 
-    // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
     @Override
-    public void onResume() {
-        // Run the default commands.
-        super.onResume();
+    // 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();
 
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
+        // Get a handle for the cookie manager.
+        CookieManager cookieManager = CookieManager.getInstance();
 
-            // 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);
+        // 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());
 
-                // Resume the nested scroll WebView JavaScript timers.
-                nestedScrollWebView.resumeTimers();
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-                // Resume the nested scroll WebView.
-                nestedScrollWebView.onResume();
-            }
-        }
+                // 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();
+                }
 
-        // 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);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-            // 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);
-        }
+                // Consume the event.
+                return true;
 
-        if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
-            // Get a handle for the root frame layouts.
-            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+            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;
 
-            // 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);
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-            /* 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));
-        }
-    }
+                    // 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());
 
-    @Override
-    public void onPause() {
-        // Run the default commands.
-        super.onPause();
+                    // 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);
+                    }
 
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+                    // 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());
+                    }
 
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
+                    // Make it so.
+                    startActivity(domainsIntent);
+                } else {  // Add a new domain.
+                    // Apply the new domain settings on returning to `MainWebViewActivity`.
+                    reapplyDomainSettingsOnRestart = true;
 
-            // Only pause the WebViews if they exist (they won't when the app is first created).
-            if (fragmentView != null) {
-                // Get the nested scroll WebView from the tab fragment.
-                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+                    // Get the current domain
+                    Uri currentUri = Uri.parse(currentWebView.getUrl());
+                    String currentDomain = currentUri.getHost();
 
-                // Pause the nested scroll WebView.
-                nestedScrollWebView.onPause();
+                    // 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);
 
-                // Pause the nested scroll WebView JavaScript timers.
-                nestedScrollWebView.pauseTimers();
-            }
-        }
+                    // Create the domain and store the database ID.
+                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
 
-        // 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));
-        }
-    }
+                    // Create an intent to launch the domains activity.
+                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-    @Override
-    public void onDestroy() {
-        // Unregister the Orbot status broadcast receiver.
-        this.unregisterReceiver(orbotStatusBroadcastReceiver);
+                    // Add the extra information to the intent.
+                    domainsIntent.putExtra("load_domain", newDomainDatabaseId);
+                    domainsIntent.putExtra("close_on_back", true);
+                    domainsIntent.putExtra("current_url", currentWebView.getUrl());
 
-        // Close the bookmarks cursor and database.
-        bookmarksCursor.close();
-        bookmarksDatabaseHelper.close();
+                    // 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);
+                    }
 
-        // Run the default commands.
-        super.onDestroy();
-    }
+                    // Check to see if the current IP addresses have been received.
+                    if (currentWebView.hasCurrentIpAddresses()) {
+                        // Add the current IP addresses to the intent.
+                        domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
+                    }
 
-    @Override
-    public 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);
+                    // Make it so.
+                    startActivity(domainsIntent);
+                }
 
-        // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
-        optionsMenu = menu;
+                // Consume the event.
+                return true;
 
-        // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
-        updatePrivacyIcons(false);
+            case R.id.toggle_first_party_cookies:
+                // Switch the first-party cookie status.
+                cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
 
-        // 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);
+                // Store the first-party cookie status.
+                currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
 
-        // Only display third-party cookies if API >= 21
-        toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
+                // Update the menu checkbox.
+                menuItem.setChecked(cookieManager.acceptCookie());
 
-        // 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);
+                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
+                updatePrivacyIcons(true);
 
-        // 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 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();
+                }
 
-        // Only show Ad Consent if this is the free flavor.
-        adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Get the shared preference values.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Consume the event.
+                return true;
 
-        // 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);
+            case R.id.toggle_third_party_cookies:
+                if (Build.VERSION.SDK_INT >= 21) {
+                    // Switch the status of thirdPartyCookiesEnabled.
+                    cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
 
-        // 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);
-        }
+                    // Update the menu checkbox.
+                    menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
 
-        // Replace Refresh with Stop if a URL is already loading.
-        if (currentWebView != null && currentWebView.getProgress() != 100) {
-            // Set the title.
-            refreshMenuItem.setTitle(R.string.stop);
+                    // 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();
+                    }
 
-            // If the icon is displayed in the AppBar, set it according to the theme.
-            if (displayAdditionalAppBarIcons) {
-                if (darkTheme) {
-                    refreshMenuItem.setIcon(R.drawable.close_dark);
-                } else {
-                    refreshMenuItem.setIcon(R.drawable.close_light);
-                }
-            }
-        }
+                    // Reload the current WebView.
+                    currentWebView.reload();
+                } // Else do nothing because SDK < 21.
 
-        return true;
-    }
+                // Consume the event.
+                return true;
 
-    @Override
-    public boolean onPrepareOptionsMenu(Menu menu) {
-        // Get handles for the menu items.
-        MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
-        MenuItem firstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
-        MenuItem thirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
-        MenuItem domStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
-        MenuItem saveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
-        MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
-        MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
-        MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
-        MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
-        MenuItem blocklistsMenuItem = menu.findItem(R.id.blocklists);
-        MenuItem easyListMenuItem = menu.findItem(R.id.easylist);
-        MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
-        MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
-        MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
-        MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
-        MenuItem blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
-        MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
-        MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
-        MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
-        MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
-        MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
+            case R.id.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.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;
 
-        // Get a handle for the cookie manager.
-        CookieManager cookieManager = CookieManager.getInstance();
+            case R.id.user_agent_firefox_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
 
-        // Initialize the current user agent string and the font size.
-        String currentUserAgent = getString(R.string.user_agent_privacy_browser);
-        int fontSize = 100;
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // 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);
-            }
+                // Consume the event.
+                return true;
 
-            // Get the current user agent from the WebView.
-            currentUserAgent = currentWebView.getSettings().getUserAgentString();
+            case R.id.user_agent_chromium_on_linux:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
 
-            // Get the current font size from the
-            fontSize = currentWebView.getSettings().getTextZoom();
+                // Reload the current WebView.
+                currentWebView.reload();
 
-            // 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());
+                // Consume the event.
+                return true;
 
-            // 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.user_agent_firefox_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
 
-            // 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));
+                // Reload the current WebView.
+                currentWebView.reload();
 
-                // Enable third-party cookies if first-party cookies are enabled.
-                thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
-            }
+                // Consume the event.
+                return true;
 
-            // Enable DOM Storage if JavaScript is enabled.
-            domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
-        }
+            case R.id.user_agent_chrome_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
 
-        // Set the status of the menu item checkboxes.
-        firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
-        proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
+                // Reload the current WebView.
+                currentWebView.reload();
 
-        // Enable Clear Cookies if there are any.
-        clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
+                // 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;
+            case R.id.user_agent_edge_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
 
-        // 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;
-        }
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_internet_explorer_on_windows:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.user_agent_safari_on_macos:
+                // Update the user agent.
+                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            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)));
+
+                // Reload the current WebView.
+                currentWebView.reload();
+
+                // Consume the event.
+                return true;
+
+            case R.id.font_size_twenty_five_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(25);
+
+                // Consume the event.
+                return true;
+
+            case R.id.font_size_fifty_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(50);
+
+                // Consume the event.
+                return true;
+
+            case R.id.font_size_seventy_five_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(75);
+
+                // Consume the event.
+                return true;
+
+            case R.id.font_size_one_hundred_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(100);
+
+                // Consume the event.
+                return true;
+
+            case R.id.font_size_one_hundred_twenty_five_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(125);
+
+                // Consume the event.
+                return true;
+
+            case R.id.font_size_one_hundred_fifty_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(150);
+
+                // Consume the event.
+                return true;
+
+            case R.id.font_size_one_hundred_seventy_five_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(175);
+
+                // Consume the event.
+                return true;
+
+            case R.id.font_size_two_hundred_percent:
+                // Set the font size.
+                currentWebView.getSettings().setTextZoom(200);
+
+                // 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;
 
-        // 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;
-        }
+                    // Display the keyboard.  `0` sets no input flags.
+                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
+                }, 200);
 
-        // Enable Clear DOM Storage if there is any.
-        clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
+                // Consume the event.
+                return 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);
+            case R.id.print:
+                // Get a print manager instance.
+                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
 
-            // Enable the clear form data menu item if there is anything to clear.
-            clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
-        }
+                // Remove the lint error below that print manager might be null.
+                assert printManager != null;
 
-        // Enable Clear Data if any of the submenu items are enabled.
-        clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
+                // Create a print document adapter from the current WebView.
+                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
 
-        // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
-        fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
+                // Print the document.
+                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
 
-        // 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);
-        }
+                // Consume the event.
+                return true;
 
-        // Instantiate the font size title and the selected font size menu item.
-        String fontSizeTitle;
-        MenuItem selectedFontSizeMenuItem;
+            case R.id.save_as_image:
+                // Instantiate the save webpage image dialog.
+                DialogFragment saveWebpageImageDialogFragment = new SaveWebpageImageDialog();
 
-        // Prepare the font size title and current size menu item.
-        switch (fontSize) {
-            case 25:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
-                break;
+                // Show the save webpage image dialog.
+                saveWebpageImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.save_as_image));
 
-            case 50:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
-                break;
+                // Consume the event.
+                return true;
 
-            case 75:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
-                break;
+            case R.id.add_to_homescreen:
+                // Instantiate the create home screen shortcut dialog.
+                DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
+                        currentWebView.getFavoriteOrDefaultIcon());
 
-            case 100:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
+                // Show the create home screen shortcut dialog.
+                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
 
-            case 125:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
-                break;
+                // Consume the event.
+                return true;
 
-            case 150:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
-                break;
+            case R.id.view_source:
+                // Create an intent to launch the view source activity.
+                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
 
-            case 175:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
-                break;
+                // Add the variables to the intent.
+                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
+                viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
 
-            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;
+                // Make it so.
+                startActivity(viewSourceIntent);
 
-            default:
-                fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
-                selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
-                break;
-        }
+                // Consume the event.
+                return true;
 
-        // Set the font size title and select the current size menu item.
-        fontSizeMenuItem.setTitle(fontSizeTitle);
-        selectedFontSizeMenuItem.setChecked(true);
+            case R.id.share_url:
+                // Setup the share string.
+                String shareString = currentWebView.getTitle() + " â€“ " + currentWebView.getUrl();
 
-        // Run all the other default commands.
-        super.onPrepareOptionsMenu(menu);
+                // Create the share intent.
+                Intent shareIntent = new Intent(Intent.ACTION_SEND);
+                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
+                shareIntent.setType("text/plain");
 
-        // Display the menu.
-        return true;
-    }
+                // Make it so.
+                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
 
-    @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);
+                // Consume the event.
+                return true;
 
-            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+            case R.id.open_with_app:
+                // Open the URL with an outside app.
+                openWithApp(currentWebView.getUrl());
 
-            /* 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);
-        }
+                // Consume the event.
+                return true;
 
-        // Get the selected menu item ID.
-        int menuItemId = menuItem.getItemId();
+            case R.id.open_with_browser:
+                // Open the URL with an outside browser.
+                openWithBrowser(currentWebView.getUrl());
 
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+                // Consume the event.
+                return true;
 
-        // Get a handle for the cookie manager.
-        CookieManager cookieManager = CookieManager.getInstance();
+            case R.id.proxy_through_orbot:
+                // Toggle the proxy through Orbot variable.
+                proxyThroughOrbot = !proxyThroughOrbot;
 
-        // 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());
+                // Apply the proxy through Orbot settings.
+                applyProxyThroughOrbot(true);
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                // Consume the event.
+                return true;
 
-                // Display a `Snackbar`.
-                if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
-                } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
-                } else {  // Privacy mode.
-                    Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
+            case R.id.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();
                 }
 
-                // 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;
+            case R.id.ad_consent:
+                // Instantiate the ad consent dialog.
+                DialogFragment adConsentDialogFragment = new AdConsentDialog();
 
-                    // TODO.  Move these to `putExtra`.  The certificate can be stored as strings.
-                    // Store the current SSL certificate and IP addresses in the domains activity.
-                    DomainsActivity.currentSslCertificate = currentWebView.getCertificate();
-                    DomainsActivity.currentIpAddresses = currentWebView.getCurrentIpAddresses();
+                // Display the ad consent dialog.
+                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
 
-                    // 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", currentWebView.getDomainSettingsDatabaseId());
-                    domainsIntent.putExtra("close_on_back", true);
-                    domainsIntent.putExtra("current_url", currentWebView.getUrl());
+            default:
+                // Don't consume the event.
+                return super.onOptionsItemSelected(menuItem);
+        }
+    }
 
-                    // Make it so.
-                    startActivity(domainsIntent);
-                } else {  // Add a new domain.
-                    // Apply the new domain settings on returning to `MainWebViewActivity`.
-                    reapplyDomainSettingsOnRestart = true;
+    // removeAllCookies is deprecated, but it is required for API < 21.
+    @Override
+    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
+        // Get the menu item ID.
+        int menuItemId = menuItem.getItemId();
 
-                    // Get the current domain
-                    Uri currentUri = Uri.parse(currentWebView.getUrl());
-                    String currentDomain = currentUri.getHost();
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                    // 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);
+        // 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;
 
-                    // Create the domain and store the database ID.
-                    int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
+            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;
 
-                    // TODO.  Move these to `putExtra`.  The certificate can be stored as strings.
-                    // Store the current SSL certificate and IP addresses in the domains activity.
-                    DomainsActivity.currentSslCertificate = currentWebView.getCertificate();
-                    DomainsActivity.currentIpAddresses = currentWebView.getCurrentIpAddresses();
+            case R.id.back:
+                if (currentWebView.canGoBack()) {
+                    // Get the current web back forward list.
+                    WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-                    // Create an intent to launch the domains activity.
-                    Intent domainsIntent = new Intent(this, DomainsActivity.class);
+                    // Get the previous entry URL.
+                    String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
 
-                    // Add the extra information to the intent.
-                    domainsIntent.putExtra("load_domain", newDomainDatabaseId);
-                    domainsIntent.putExtra("close_on_back", true);
-                    domainsIntent.putExtra("current_url", currentWebView.getUrl());
+                    // Apply the domain settings.
+                    applyDomainSettings(currentWebView, previousUrl, false, false);
 
-                    // Make it so.
-                    startActivity(domainsIntent);
+                    // Load the previous website in the history.
+                    currentWebView.goBack();
                 }
-                return true;
-
-            case R.id.toggle_first_party_cookies:
-                // Switch the first-party cookie status.
-                cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
+                break;
 
-                // Store the first-party cookie status.
-                currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
+            case R.id.forward:
+                if (currentWebView.canGoForward()) {
+                    // Get the current web back forward list.
+                    WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(cookieManager.acceptCookie());
+                    // Get the next entry URL.
+                    String nextUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() + 1).getUrl();
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(true);
+                    // Apply the domain settings.
+                    applyDomainSettings(currentWebView, nextUrl, false, false);
 
-                // 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();
+                    // Load the next website in the history.
+                    currentWebView.goForward();
                 }
+                break;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+            case R.id.history:
+                // Instantiate the URL history dialog.
+                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
 
-            case R.id.toggle_third_party_cookies:
-                if (Build.VERSION.SDK_INT >= 21) {
-                    // Switch the status of thirdPartyCookiesEnabled.
-                    cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
+                // Show the URL history dialog.
+                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
+                break;
 
-                    // Update the menu checkbox.
-                    menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
+            case R.id.requests:
+                // Populate the resource requests.
+                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
 
-                    // 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();
-                    }
+                // Create an intent to launch the Requests activity.
+                Intent requestsIntent = new Intent(this, RequestsActivity.class);
 
-                    // Reload the current WebView.
-                    currentWebView.reload();
-                } // Else do nothing because SDK < 21.
-                return true;
+                // Add the block third-party requests status to the intent.
+                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 
-            case R.id.toggle_dom_storage:
-                // Toggle the status of domStorageEnabled.
-                currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
+                // Make it so.
+                startActivity(requestsIntent);
+                break;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
+            case R.id.downloads:
+                // Launch the system Download Manager.
+                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
 
-                // Update the privacy icon.  `true` refreshes the app bar icons.
-                updatePrivacyIcons(true);
+                // 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);
 
-                // 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();
-                }
+                startActivity(downloadManagerIntent);
+                break;
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+            case R.id.domains:
+                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
+                reapplyDomainSettingsOnRestart = true;
 
-            // 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());
+                // Launch the domains activity.
+                Intent domainsIntent = new Intent(this, DomainsActivity.class);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
+                // Add the extra information to the intent.
+                domainsIntent.putExtra("current_url", currentWebView.getUrl());
 
-                // 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();
+                // 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);
                 }
 
-                // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
-                updatePrivacyIcons(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());
+                }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Make it so.
+                startActivity(domainsIntent);
+                break;
 
-            case R.id.clear_cookies:
-                Snackbar.make(findViewById(R.id.webviewpager), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
-                        .setAction(R.string.undo, v -> {
-                            // Do nothing because everything will be handled by `onDismissed()` below.
-                        })
-                        .addCallback(new Snackbar.Callback() {
-                            @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
-                            @Override
-                            public void onDismissed(Snackbar snackbar, int event) {
-                                if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
-                                    // Delete the cookies, which command varies by SDK.
-                                    if (Build.VERSION.SDK_INT < 21) {
-                                        cookieManager.removeAllCookie();
-                                    } else {
-                                        cookieManager.removeAllCookies(null);
-                                    }
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+            case R.id.settings:
+                // Set the flag to reapply app settings on restart when returning from Settings.
+                reapplyAppSettingsOnRestart = 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();
+                // Set the flag to reapply the domain settings on restart when returning from Settings.
+                reapplyDomainSettingsOnRestart = true;
 
-                                    // Initialize a handler to manually delete the DOM storage files and directories.
-                                    Handler deleteDomStorageHandler = new Handler();
+                // Launch the settings activity.
+                Intent settingsIntent = new Intent(this, SettingsActivity.class);
+                startActivity(settingsIntent);
+                break;
 
-                                    // Setup a runnable to manually delete the DOM storage files and directories.
-                                    Runnable deleteDomStorageRunnable = () -> {
-                                        try {
-                                            // Get a handle for the runtime.
-                                            Runtime runtime = Runtime.getRuntime();
+            case R.id.import_export:
+                // Launch the import/export activity.
+                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
+                startActivity(importExportIntent);
+                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.logcat:
+                // Launch the logcat activity.
+                Intent logcatIntent = new Intent(this, LogcatActivity.class);
+                startActivity(logcatIntent);
+                break;
 
-                                            // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
-                                            Process deleteLocalStorageProcess = runtime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
+            case R.id.guide:
+                // Launch `GuideActivity`.
+                Intent guideIntent = new Intent(this, GuideActivity.class);
+                startActivity(guideIntent);
+                break;
 
-                                            // 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");
+            case R.id.about:
+                // Create an intent to launch the about activity.
+                Intent aboutIntent = new Intent(this, AboutActivity.class);
 
-                                            // Wait for the processes to finish.
-                                            deleteLocalStorageProcess.waitFor();
-                                            deleteIndexProcess.waitFor();
-                                            deleteQuotaManagerProcess.waitFor();
-                                            deleteQuotaManagerJournalProcess.waitFor();
-                                            deleteDatabasesProcess.waitFor();
-                                        } catch (Exception exception) {
-                                            // Do nothing if an error is thrown.
-                                        }
-                                    };
+                // 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]};
 
-                                    // Manually delete the DOM storage files after 200 milliseconds.
-                                    deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
-                                }
-                            }
-                        })
-                        .show();
-                return true;
+                // Add the blocklist versions to the intent.
+                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
 
-            // 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;
+                // Make it so.
+                startActivity(aboutIntent);
+                break;
+        }
 
-            case R.id.easylist:
-                // Toggle the EasyList status.
-                currentWebView.enableBlocklist(NestedScrollWebView.EASY_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
+        // Get a handle for the drawer layout.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_LIST));
+        // Close the navigation drawer.
+        drawerLayout.closeDrawer(GravityCompat.START);
+        return true;
+    }
+
+    @Override
+    public void onPostCreate(Bundle savedInstanceState) {
+        // Run the default commands.
+        super.onPostCreate(savedInstanceState);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
+        actionBarDrawerToggle.syncState();
+    }
 
-            case R.id.easyprivacy:
-                // Toggle the EasyPrivacy status.
-                currentWebView.enableBlocklist(NestedScrollWebView.EASY_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
+    @Override
+    public void onConfigurationChanged(@NonNull Configuration newConfig) {
+        // Run the default commands.
+        super.onConfigurationChanged(newConfig);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASY_PRIVACY));
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-            case R.id.fanboys_annoyance_list:
-                // Toggle Fanboy's Annoyance List status.
-                currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+        // Recalculate the drawer header padding.
+        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
+        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
+        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
+        // 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 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));
+        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
+        // https://code.google.com/p/android/issues/detail?id=20493#c8
+        // ActivityCompat.invalidateOptionsMenu(this);
+    }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
+        // Store the hit test result.
+        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
 
-            case R.id.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));
+        // Define the URL strings.
+        final String imageUrl;
+        final String linkUrl;
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
+        // Get handles for the system managers.
+        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+        FragmentManager fragmentManager = getSupportFragmentManager();
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+        // Remove the lint errors below that the clipboard manager might be null.
+        assert clipboardManager != null;
 
-            case R.id.ultraprivacy:
-                // Toggle the UltraPrivacy status.
-                currentWebView.enableBlocklist(NestedScrollWebView.ULTRA_PRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
+        // 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();
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRA_PRIVACY));
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Add an Open in New Tab entry.
+                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the link URL in a new tab and move to it.
+                    addNewTab(linkUrl, 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));
+                    // Consume the event.
+                    return true;
+                });
 
-                // Update the menu checkbox.
-                menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+                // 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);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return 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]);
+                // Add an Open with App entry.
+                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithApp(linkUrl);
 
-                // 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 an Open with Browser entry.
+                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
+                    openWithBrowser(linkUrl);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                    // 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]);
+                // 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);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
 
-            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 a Download URL entry.
+                menu.add(R.string.download_url).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(linkUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the variables for future use by `onRequestPermissionsResult()`.
+                            downloadUrl = linkUrl;
+                            downloadContentDisposition = "none";
+                            downloadContentLength = -1;
 
-            case R.id.user_agent_safari_on_ios:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
+                            // 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);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                                // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
+                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
+                            } else {  // Show the permission request directly.
+                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
+                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
+                            }
+                        } else {  // The storage permission has already been granted.
+                            // Get a handle for the download file alert dialog.
+                            DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(linkUrl, "none", -1);
 
-            case R.id.user_agent_firefox_on_linux:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
+                            // Show the download file alert dialog.
+                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                    // 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]);
+                // 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;
+            case WebView.HitTestResult.EMAIL_TYPE:
+                // Get the target URL.
+                linkUrl = hitTestResult.getExtra();
 
-            case R.id.user_agent_firefox_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
+                // Set the target URL as the title of the `ContextMenu`.
+                menu.setHeaderTitle(linkUrl);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return 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);
 
-            case R.id.user_agent_chrome_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
+                    // 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.user_agent_edge_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
+                    // Make it so.
+                    startActivity(emailIntent);
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.user_agent_internet_explorer_on_windows:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
+                // 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();
-                return true;
+                    // Set the `ClipData` as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
 
-            case R.id.user_agent_safari_on_macos:
-                // Update the user agent.
-                currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
+                    // Consume the event.
+                    return true;
+                });
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
+                menu.add(R.string.cancel);
+                break;
 
-            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)));
+            // `IMAGE_TYPE` is an image.
+            case WebView.HitTestResult.IMAGE_TYPE:
+                // Get the image URL.
+                imageUrl = hitTestResult.getExtra();
 
-                // Reload the current WebView.
-                currentWebView.reload();
-                return true;
+                // Set the image URL as the title of the context menu.
+                menu.setHeaderTitle(imageUrl);
 
-            case R.id.font_size_twenty_five_percent:
-                currentWebView.getSettings().setTextZoom(25);
-                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);
 
-            case R.id.font_size_fifty_percent:
-                currentWebView.getSettings().setTextZoom(50);
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.font_size_seventy_five_percent:
-                currentWebView.getSettings().setTextZoom(75);
-                return true;
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
+                    // Load the image in the current tab.
+                    loadUrl(imageUrl);
 
-            case R.id.font_size_one_hundred_percent:
-                currentWebView.getSettings().setTextZoom(100);
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.font_size_one_hundred_twenty_five_percent:
-                currentWebView.getSettings().setTextZoom(125);
-                return 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;
 
-            case R.id.font_size_one_hundred_fifty_percent:
-                currentWebView.getSettings().setTextZoom(150);
-                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.font_size_one_hundred_seventy_five_percent:
-                currentWebView.getSettings().setTextZoom(175);
-                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}, 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.font_size_two_hundred_percent:
-                currentWebView.getSettings().setTextZoom(200);
-                return true;
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
 
-            case R.id.swipe_to_refresh:
-                // Toggle the stored status of swipe to refresh.
-                currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
+                    // Consume the event.
+                    return true;
+                });
 
-                // Get a handle for the swipe refresh layout.
-                SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+                // 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);
 
-                // 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;
+                    // Set the clip data as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(imageTypeClipData);
 
-            case R.id.display_images:
-                if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
-                    // Disable loading of images.
-                    currentWebView.getSettings().setLoadsImagesAutomatically(false);
+                    // Consume the event.
+                    return true;
+                });
 
-                    // 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;
+                // 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);
 
-            case R.id.night_mode:
-                // Toggle night mode.
-                currentWebView.setNightMode(!currentWebView.getNightMode());
+                    // Consume the event.
+                    return true;
+                });
 
-                // 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));
-                }
+                // 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);
 
-                // Update the privacy icons.
-                updatePrivacyIcons(false);
+                    // Consume the event.
+                    return true;
+                });
 
-                // Reload the website.
-                currentWebView.reload();
-                return true;
+                // Add a Cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                break;
 
-            case R.id.find_on_page:
-                // Get a handle for the views.
-                Toolbar toolbar = findViewById(R.id.toolbar);
-                LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
-                EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
+            // `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();
 
-                // Hide the toolbar.
-                toolbar.setVisibility(View.GONE);
+                // Instantiate a handler.
+                Handler handler = new Handler();
 
-                // Show the find on page linear layout.
-                findOnPageLinearLayout.setVisibility(View.VISIBLE);
+                // Get a message from the handler.
+                Message message = handler.obtainMessage();
 
-                // 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();
+                // Request the image details from the last touched node be returned in the message.
+                currentWebView.requestFocusNodeHref(message);
 
-                    // Get a handle for the input method manager.
-                    InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+                // Get the link URL from the message data.
+                linkUrl = message.getData().getString("url");
 
-                    // Remove the lint warning below that the input method manager might be null.
-                    assert inputMethodManager != null;
+                // Set the link URL as the title of the context menu.
+                menu.setHeaderTitle(linkUrl);
 
-                    // Display the keyboard.  `0` sets no input flags.
-                    inputMethodManager.showSoftInput(findOnPageEditText, 0);
-                }, 200);
-                return true;
+                // Add an Open in New Tab entry.
+                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Load the link URL in a new tab and move to it.
+                    addNewTab(linkUrl, true);
 
-            case R.id.view_source:
-                // Create an intent to launch the view source activity.
-                Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
+                    // Consume the event.
+                    return true;
+                });
 
-                // Add the variables to the intent.
-                viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
-                viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
+                // 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);
 
-                // Make it so.
-                startActivity(viewSourceIntent);
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            case R.id.share_url:
-                // Setup the share string.
-                String shareString = currentWebView.getTitle() + " â€“ " + currentWebView.getUrl();
+                // 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);
 
-                // Create the share intent.
-                Intent shareIntent = new Intent(Intent.ACTION_SEND);
-                shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
-                shareIntent.setType("text/plain");
+                    // Consume the event.
+                    return true;
+                });
 
-                // Make it so.
-                startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
-                return true;
+                // Add a View Image entry.
+                menu.add(R.string.view_image).setOnMenuItemClickListener((MenuItem item) -> {
+                   // View the image in the current tab.
+                   loadUrl(imageUrl);
 
-            case R.id.print:
-                // Get a print manager instance.
-                PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
+                   // Consume the event.
+                   return true;
+                });
 
-                // Remove the lint error below that print manager might be null.
-                assert printManager != null;
+                // Add a Download Image entry.
+                menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
+                    // Check if the download should be processed by an external app.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
+                        openUrlWithExternalApp(imageUrl);
+                    } else {  // Download with Android's download manager.
+                        // Check to see if the storage permission has already been granted.
+                        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
+                            // Store the image URL for use by `onRequestPermissionResult()`.
+                            downloadImageUrl = imageUrl;
 
-                // Create a print document adapter from the current WebView.
-                PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
+                            // 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);
 
-                // Print the document.
-                printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
-                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}, 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.open_with_app:
-                openWithApp(currentWebView.getUrl());
-                return true;
+                            // Show the download image alert dialog.
+                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
+                        }
+                    }
 
-            case R.id.open_with_browser:
-                openWithBrowser(currentWebView.getUrl());
-                return true;
+                    // 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());
+                // 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);
 
-                // Show the create home screen shortcut dialog.
-                createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
-                return true;
+                    // Set the clip data as the clipboard's primary clip.
+                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
 
-            case R.id.proxy_through_orbot:
-                // Toggle the proxy through Orbot variable.
-                proxyThroughOrbot = !proxyThroughOrbot;
+                    // Consume the event.
+                    return true;
+                });
 
-                // Apply the proxy through Orbot settings.
-                applyProxyThroughOrbot(true);
-                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.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;
+                    // Consume the event.
+                    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.ad_consent:
-                // Display the ad consent dialog.
-                DialogFragment adConsentDialogFragment = new AdConsentDialog();
-                adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
-                return true;
+                    // Consume the event.
+                    return true;
+                });
 
-            default:
-                // Don't consume the event.
-                return super.onOptionsItemSelected(menuItem);
+                // Add a cancel entry, which by default closes the context menu.
+                menu.add(R.string.cancel);
+                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 onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-        // Run the commands that correspond to the selected menu item.
-        switch (menuItemId) {
-            case R.id.close_tab:
-                // Get a handle for the tab layout and the view pager.
-                TabLayout tabLayout = findViewById(R.id.tablayout);
-                ViewPager webViewPager = findViewById(R.id.webviewpager);
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-                // Get the current tab number.
-                int currentTabNumber = tabLayout.getSelectedTabPosition();
+        // 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);
 
-                // Delete the current tab.
-                tabLayout.removeTabAt(currentTabNumber);
+        // Extract the strings from the edit texts.
+        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 
-                // Delete the current page.  If the selected page number did not change during the delete, it will return true, meaning that the current WebView must be reset.
-                if (webViewPagerAdapter.deletePage(currentTabNumber, webViewPager)) {
-                    setCurrentWebView(currentTabNumber);
-                }
-                break;
+        // Create a favorite icon byte array output stream.
+        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-            case R.id.clear_and_exit:
-                // Close the bookmarks cursor and database.
-                bookmarksCursor.close();
-                bookmarksDatabaseHelper.close();
+        // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 
-                // Get the status of the clear everything preference.
-                boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+        // Convert the favorite icon byte array stream to a byte array.
+        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-                // Get a handle for the runtime.
-                Runtime runtime = Runtime.getRuntime();
+        // Display the new bookmark below the current items in the (0 indexed) list.
+        int newBookmarkDisplayOrder = bookmarksListView.getCount();
 
-                // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
-                // which links to `/data/data/com.stoutner.privacybrowser.standard`.
-                String privateDataDirectoryString = getApplicationInfo().dataDir;
+        // Create the bookmark.
+        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 
-                // Clear cookies.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
-                    // The command to remove cookies changed slightly in API 21.
-                    if (Build.VERSION.SDK_INT >= 21) {
-                        CookieManager.getInstance().removeAllCookies(null);
-                    } else {
-                        CookieManager.getInstance().removeAllCookie();
-                    }
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                    // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
-                    try {
-                        // Two commands must be used because `Runtime.exec()` does not like `*`.
-                        Process deleteCookiesProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
-                        Process deleteCookiesJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
-
-                        // Wait until the processes have finished.
-                        deleteCookiesProcess.waitFor();
-                        deleteCookiesJournalProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                // Clear DOM storage.
-                if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                    // Ask `WebStorage` to clear the DOM storage.
-                    WebStorage webStorage = WebStorage.getInstance();
-                    webStorage.deleteAllData();
+        // Scroll to the new bookmark.
+        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+    }
 
-                    // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
-                    try {
-                        // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
-                        Process deleteLocalStorageProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
-
-                        // Multiple commands must be used because `Runtime.exec()` does not like `*`.
-                        Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
-                        Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
-                        Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
-                        Process deleteDatabaseProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
-
-                        // Wait until the processes have finished.
-                        deleteLocalStorageProcess.waitFor();
-                        deleteIndexProcess.waitFor();
-                        deleteQuotaManagerProcess.waitFor();
-                        deleteQuotaManagerJournalProcess.waitFor();
-                        deleteDatabaseProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+    @Override
+    public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
+        // Get a handle for the bookmarks list view.
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
 
-                // Clear form data if the API < 26.
-                if ((Build.VERSION.SDK_INT < 26) && (clearEverything || sharedPreferences.getBoolean("clear_form_data", true))) {
-                    WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
-                    webViewDatabase.clearFormData();
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-                    // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
-                    try {
-                        // A string array must be used because the database contains a space and `Runtime.exec` will not otherwise escape the string correctly.
-                        Process deleteWebDataProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
-                        Process deleteWebDataJournalProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
-
-                        // Wait until the processes have finished.
-                        deleteWebDataProcess.waitFor();
-                        deleteWebDataJournalProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-                // Clear the cache.
-                if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
-                    // Clear the cache from each WebView.
-                    for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-                        // Get the WebView tab fragment.
-                        WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+        // Get 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);
 
-                        // Get the fragment view.
-                        View fragmentView = webViewTabFragment.getView();
+        // Get new folder name string.
+        String folderNameString = createFolderNameEditText.getText().toString();
 
-                        // Only clear the cache if the WebView exists.
-                        if (fragmentView != null) {
-                            // Get the nested scroll WebView from the tab fragment.
-                            NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+        // Create a folder icon bitmap.
+        Bitmap folderIconBitmap;
 
-                            // Clear the cache for this WebView.
-                            nestedScrollWebView.clearCache(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();
 
-                    // Manually delete the cache directories.
-                    try {
-                        // Delete the main cache directory.
-                        Process deleteCacheProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+            // Convert the folder icon drawable to a bitmap drawable.
+            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-                        // Delete the secondary `Service Worker` cache directory.
-                        // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
-                        Process deleteServiceWorkerProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
+            // 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;
+        }
 
-                        // Wait until the processes have finished.
-                        deleteCacheProcess.waitFor();
-                        deleteServiceWorkerProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+        // Create a folder icon byte array output stream.
+        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                // Wipe out each WebView.
-                for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-                    // Get the WebView tab fragment.
-                    WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+        // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+        folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 
-                    // Get the fragment view.
-                    View fragmentView = webViewTabFragment.getView();
+        // Convert the folder icon byte array stream to a byte array.
+        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 
-                    // Only wipe out the WebView if it exists.
-                    if (fragmentView != null) {
-                        // Get the nested scroll WebView from the tab fragment.
-                        NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+        // 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);
+        }
 
-                        // Clear SSL certificate preferences for this WebView.
-                        nestedScrollWebView.clearSslPreferences();
+        // Create the folder, which will be placed at the top of the `ListView`.
+        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
 
-                        // Clear the back/forward history for this WebView.
-                        nestedScrollWebView.clearHistory();
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                        // Destroy the internal state of `mainWebView`.
-                        nestedScrollWebView.destroy();
-                    }
-                }
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 
-                // Clear the custom headers.
-                customHeaders.clear();
+        // Scroll to the new folder.
+        bookmarksListView.setSelection(0);
+    }
 
-                // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
-                // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
-                if (clearEverything) {
-                    try {
-                        // Delete the folder.
-                        Process deleteAppWebviewProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
+    @Override
+    public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-                        // Wait until the process has finished.
-                        deleteAppWebviewProcess.waitFor();
-                    } catch (Exception exception) {
-                        // Do nothing if an error is thrown.
-                    }
-                }
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-                // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
-                if (Build.VERSION.SDK_INT >= 21) {
-                    finishAndRemoveTask();
-                } else {
-                    finish();
-                }
+        // Get handles for the views 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);
 
-                // Remove the terminated program from RAM.  The status code is `0`.
-                System.exit(0);
-                break;
+        // Store the bookmark strings.
+        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
+        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 
-            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;
+        // 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.back:
-                if (currentWebView.canGoBack()) {
-                    // Reset the current domain name so that navigation works if third-party requests are blocked.
-                    currentWebView.resetCurrentDomainName();
+            // 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 navigating history so that the domain settings are applied when the new URL is loaded.
-                    currentWebView.setNavigatingHistory(true);
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 
-                    // Load the previous website in the history.
-                    currentWebView.goBack();
-                }
-                break;
+            //  Update the bookmark and the favorite icon.
+            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
+        }
 
-            case R.id.forward:
-                if (currentWebView.canGoForward()) {
-                    // Reset the current domain name so that navigation works if third-party requests are blocked.
-                    currentWebView.resetCurrentDomainName();
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                    // Set navigating history so that the domain settings are applied when the new URL is loaded.
-                    currentWebView.setNavigatingHistory(true);
+        // Update the list view.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-                    // Load the next website in the history.
-                    currentWebView.goForward();
-                }
-                break;
+    @Override
+    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
+        // Get the dialog.
+        Dialog dialog = dialogFragment.getDialog();
 
-            case R.id.history:
-                // Get the `WebBackForwardList`.
-                WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
+        // Remove the incorrect lint warning below that the dialog might be null.
+        assert dialog != null;
 
-                // Show the URL history dialog and name this instance `R.string.history`.
-                DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(this, webBackForwardList);
-                urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
-                break;
+        // 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.requests:
-                // Populate the resource requests.
-                RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
+        // Get the new folder name.
+        String newFolderNameString = editFolderNameEditText.getText().toString();
 
-                // Create an intent to launch the Requests activity.
-                Intent requestsIntent = new Intent(this, RequestsActivity.class);
+        // Check if the favorite icon has changed.
+        if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
+            // Update the name in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
+        } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
+            // Create the new folder icon Bitmap.
+            Bitmap folderIconBitmap;
 
-                // Add the block third-party requests status to the intent.
-                requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
+            // Populate the new folder icon bitmap.
+            if (defaultFolderIconRadioButton.isChecked()) {
+                // Get the default folder icon drawable.
+                Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 
-                // Make it so.
-                startActivity(requestsIntent);
-                break;
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 
-            case R.id.downloads:
-                // Launch the system Download Manager.
-                Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
+                // 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;
+            }
 
-                // 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);
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-                startActivity(downloadManagerIntent);
-                break;
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
 
-            case R.id.domains:
-                // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
-                reapplyDomainSettingsOnRestart = true;
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+
+            // 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();
+
+                // Convert the folder icon drawable to a bitmap drawable.
+                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+
+                // Convert the folder icon bitmap drawable to a bitmap.
+                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
+            } else {  // Use the `WebView` favorite icon.
+                // Copy the favorite icon bitmap to the folder icon bitmap.
+                folderIconBitmap = favoriteIconBitmap;
+            }
+
+            // Create a folder icon byte array output stream.
+            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+            // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
+            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
+
+            // Convert the folder icon byte array stream to a byte array.
+            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 
-                // TODO.  Move these to `putExtra`.  The certificate can be stored as strings.
-                // Store the current SSL certificate and IP addresses in the domains activity.
-                DomainsActivity.currentSslCertificate = currentWebView.getCertificate();
-                DomainsActivity.currentIpAddresses = currentWebView.getCurrentIpAddresses();
+            // Update the folder name and icon in the database.
+            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+        }
 
-                // Launch the domains activity.
-                Intent domainsIntent = new Intent(this, DomainsActivity.class);
+        // Update the bookmarks cursor with the current contents of this folder.
+        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
 
-                // Add the extra information to the intent.
-                domainsIntent.putExtra("current_url", currentWebView.getUrl());
+        // Update the `ListView`.
+        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+    }
 
-                // Make it so.
-                startActivity(domainsIntent);
+    @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;
 
-            case R.id.settings:
-                // Set the flag to reapply app settings on restart when returning from Settings.
-                reapplyAppSettingsOnRestart = true;
+            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;
+        }
+    }
 
-                // Set the flag to reapply the domain settings on restart when returning from Settings.
-                reapplyDomainSettingsOnRestart = true;
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        // Get a handle for the fragment manager.
+        FragmentManager fragmentManager = getSupportFragmentManager();
 
-                // Launch the settings activity.
-                Intent settingsIntent = new Intent(this, SettingsActivity.class);
-                startActivity(settingsIntent);
-                break;
+        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);
 
-            case R.id.import_export:
-                // Launch the import/export activity.
-                Intent importExportIntent = new Intent (this, ImportExportActivity.class);
-                startActivity(importExportIntent);
-                break;
+                // 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));
+                }
 
-            case R.id.logcat:
-                // Launch the logcat activity.
-                Intent logcatIntent = new Intent(this, LogcatActivity.class);
-                startActivity(logcatIntent);
+                // Reset the download variables.
+                downloadUrl = "";
+                downloadContentDisposition = "";
+                downloadContentLength = 0;
                 break;
 
-            case R.id.guide:
-                // Launch `GuideActivity`.
-                Intent guideIntent = new Intent(this, GuideActivity.class);
-                startActivity(guideIntent);
-                break;
+            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);
 
-            case R.id.about:
-                // Create an intent to launch the about activity.
-                Intent aboutIntent = new Intent(this, AboutActivity.class);
+                // 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));
+                }
 
-                // 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]};
+                // Reset the image URL variable.
+                downloadImageUrl = "";
+                break;
 
-                // Add the blocklist versions to the intent.
-                aboutIntent.putExtra("blocklist_versions", blocklistVersions);
+            case SAVE_WEBPAGE_IMAGE_REQUEST_CODE:
+                // Check to see if the storage permission was granted.  If the dialog was canceled the grant result will be empty.
+                if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) {  // The storage permission was granted.
+                    // Save the webpage image.
+                    new SaveWebpageImage(this, currentWebView).execute(saveWebsiteImageFilePath);
+                } else {  // The storage permission was not granted.
+                    // Display an error snackbar.
+                    Snackbar.make(currentWebView, getString(R.string.cannot_use_location), Snackbar.LENGTH_LONG).show();
+                }
 
-                // Make it so.
-                startActivity(aboutIntent);
+                // Reset the save website image file path.
+                saveWebsiteImageFilePath = "";
                 break;
         }
-
-        // Get a handle for the drawer layout.
-        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
-
-        // Close the navigation drawer.
-        drawerLayout.closeDrawer(GravityCompat.START);
-        return true;
     }
 
     @Override
-    public void onPostCreate(Bundle savedInstanceState) {
-        // Run the default commands.
-        super.onPostCreate(savedInstanceState);
+    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);
 
-        // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
-        actionBarDrawerToggle.syncState();
-    }
+            // Parse `imageUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
 
-    @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        // Run the default commands.
-        super.onConfigurationChanged(newConfig);
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-        // Get the status bar pixel size.
-        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
-        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
+            // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
+            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
+            if (cookieManager.acceptCookie()) {
+                // Get the cookies for `imageUrl`.
+                String cookies = cookieManager.getCookie(imageUrl);
 
-        // Get the resource density.
-        float screenDensity = getResources().getDisplayMetrics().density;
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
-        // Recalculate the drawer header padding.
-        drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
-        drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
-        drawerHeaderPaddingBottom = (int) (8 * screenDensity);
+            // Get the dialog.
+            Dialog dialog = dialogFragment.getDialog();
 
-        // 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));
-        }
+            // Remove the incorrect lint warning below that the dialog might be null.
+            assert dialog != null;
 
-        // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
-        // https://code.google.com/p/android/issues/detail?id=20493#c8
-        // ActivityCompat.invalidateOptionsMenu(this);
-    }
+            // Get the file name from the dialog fragment.
+            EditText downloadImageNameEditText = dialog.findViewById(R.id.download_image_name);
+            String imageName = downloadImageNameEditText.getText().toString();
 
-    @Override
-    public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
-        // Store the hit test result.
-        final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
+            // 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);
+            }
 
-        // Create the URL strings.
-        final String imageUrl;
-        final String linkUrl;
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-        // Get handles for the system managers.
-        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
-        FragmentManager fragmentManager = getSupportFragmentManager();
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(imageUrl);
 
-        // Remove the lint errors below that the clipboard manager might be null.
-        assert clipboardManager != null;
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-        // 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 lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+            // Initiate the download.
+            downloadManager.enqueue(downloadRequest);
+        } else {  // The image is not an HTTP or HTTPS URI.
+            Snackbar.make(currentWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
+        }
+    }
 
-                // Add a Load URL entry.
-                menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
-                    // Add a new tab.
-                    addTab(null);
+    @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);
 
-                    // Load the URL.
-                    loadUrl(linkUrl);
-                    return false;
-                });
+            // Parse `downloadUrl`.
+            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(linkUrl);
-                    return false;
-                });
+            // Get a handle for the cookie manager.
+            CookieManager cookieManager = CookieManager.getInstance();
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(linkUrl);
-                    return false;
-                });
+            // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
+            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
+            if (cookieManager.acceptCookie()) {
+                // Get the cookies for `downloadUrl`.
+                String cookies = cookieManager.getCookie(downloadUrl);
 
-                // Add a 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);
+                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
+                downloadRequest.addRequestHeader("Cookie", cookies);
+            }
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
-                    return false;
-                });
+            // Get the dialog.
+            Dialog dialog = dialogFragment.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 dialog != 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 the file name from the dialog.
+            EditText downloadFileNameEditText = dialog.findViewById(R.id.download_file_name);
+            String fileName = downloadFileNameEditText.getText().toString();
 
-                                // 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);
+            // 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);
+            }
 
-                            // Show the download file alert dialog.
-                            downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+            // Allow `MediaScanner` to index the download if it is a media file.
+            downloadRequest.allowScanningByMediaScanner();
 
-                // Add a Cancel entry, which by default closes the context menu.
-                menu.add(R.string.cancel);
-                break;
+            // Add the URL as the description for the download.
+            downloadRequest.setDescription(downloadUrl);
 
-            case WebView.HitTestResult.EMAIL_TYPE:
-                // Get the target URL.
-                linkUrl = hitTestResult.getExtra();
+            // Show the download notification after the download is completed.
+            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
 
-                // Set the target URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(linkUrl);
+            // Remove the lint warning below that `downloadManager` might be `null`.
+            assert downloadManager != null;
 
-                // 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);
+            // 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();
+        }
+    }
 
-                    // Parse the url and set it as the data for the `Intent`.
-                    emailIntent.setData(Uri.parse("mailto:" + linkUrl));
+    // 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);
 
-                    // `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);
+        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);
 
-                    // Make it so.
-                    startActivity(emailIntent);
-                    return false;
-                });
+                // Load the new folder.
+                loadBookmarksFolder();
+            }
+        } else if (displayingFullScreenVideo) {  // A full screen video is shown.
+            // Get a handle for the layouts.
+            FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
+            RelativeLayout mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
+            FrameLayout fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
 
-                // Add a 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);
+            // Re-enable the screen timeout.
+            fullScreenVideoFrameLayout.setKeepScreenOn(false);
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcEmailTypeClipData);
-                    return false;
-                });
+            // Unset the full screen video flag.
+            displayingFullScreenVideo = false;
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+            // Remove all the views from the full screen video frame layout.
+            fullScreenVideoFrameLayout.removeAllViews();
 
-            // `IMAGE_TYPE` is an image.
-            case WebView.HitTestResult.IMAGE_TYPE:
-                // Get the image URL.
-                imageUrl = hitTestResult.getExtra();
+            // Hide the full screen video frame layout.
+            fullScreenVideoFrameLayout.setVisibility(View.GONE);
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+            // Enable the sliding drawers.
+            drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
 
-                // Add a View Image entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+            // Show the main content relative layout.
+            mainContentRelativeLayout.setVisibility(View.VISIBLE);
 
-                // 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 appropriate full screen mode flags.
+            if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
+                // Hide the app bar if specified.
+                if (hideAppBar) {
+                    // Get handles for the views.
+                    LinearLayout tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
+                    ActionBar actionBar = getSupportActionBar();
 
-                            // Show a dialog if the user has previously denied the permission.
-                            if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
-                                // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
-                                DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
+                    // Remove the incorrect lint warning below that the action bar might be null.
+                    assert actionBar != null;
 
-                                // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
-                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
-                            } else {  // Show the permission request directly.
-                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
-                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
-                            }
-                        } else {  // The storage permission has already been granted.
-                            // Get a handle for the download image alert dialog.
-                            DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
+                    // Hide the tab linear layout.
+                    tabsLinearLayout.setVisibility(View.GONE);
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+                    // Hide the action bar.
+                    actionBar.hide();
+                }
 
-                // Add a Copy URL entry.
-                menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
-                    // Save the image URL in a `ClipData`.
-                    ClipData srcImageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
+                // Hide the banner ad in the free flavor.
+                if (BuildConfig.FLAVOR.contentEquals("free")) {
+                    AdHelper.hideAd(findViewById(R.id.adview));
+                }
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageTypeClipData);
-                    return false;
-                });
+                // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
+                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(imageUrl);
-                    return false;
-                });
+                /* Hide the system bars.
+                 * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
+                 * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
+                 * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
+                 * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
+                 */
+                rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                        View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+            } else {  // Switch to normal viewing mode.
+                // Remove the `SYSTEM_UI` flags from the root frame layout.
+                rootFrameLayout.setSystemUiVisibility(0);
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(imageUrl);
-                    return false;
-                });
+                // Add the translucent status flag.
+                getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
+            }
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
-                break;
+            // 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();
 
+            // Get the previous entry URL.
+            String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
 
-            // `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();
+            // Apply the domain settings.
+            applyDomainSettings(currentWebView, previousUrl, false, false);
 
-                // Set the image URL as the title of the `ContextMenu`.
-                menu.setHeaderTitle(imageUrl);
+            // 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();
+            }
 
-                // Add a `View Image` entry.
-                menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
-                    loadUrl(imageUrl);
-                    return false;
-                });
+            // Manually kill Privacy Browser.  Otherwise, it is glitchy when restarted.
+            System.exit(0);
+        }
+    }
 
-                // 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;
+    // Process the results of a file browse.
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        // Run the default commands.
+        super.onActivityResult(requestCode, resultCode, data);
 
-                            // 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);
+        // Run the commands that correlate to the specified request code.
+        switch (requestCode) {
+            case FILE_UPLOAD_REQUEST_CODE:
+                // File uploads only work on API >= 21.
+                if (Build.VERSION.SDK_INT >= 21) {
+                    // Pass the file to the WebView.
+                    fileChooserCallback.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, data));
+                }
+                break;
 
-                                // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
-                                downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
-                            } else {  // Show the permission request directly.
-                                // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
-                                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
-                            }
-                        } else {  // The storage permission has already been granted.
-                            // Get a handle for the download image alert dialog.
-                            DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
+            case BROWSE_SAVE_WEBPAGE_IMAGE_REQUEST_CODE:
+                // Don't do anything if the user pressed back from the file picker.
+                if (resultCode == Activity.RESULT_OK) {
+                    // Get a handle for the save dialog fragment.
+                    DialogFragment saveWebpageImageDialogFragment= (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.save_as_image));
 
-                            // Show the download image alert dialog.
-                            downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
-                        }
-                    }
-                    return false;
-                });
+                    // Only update the file name if the dialog still exists.
+                    if (saveWebpageImageDialogFragment != null) {
+                        // Get a handle for the save webpage image dialog.
+                        Dialog saveWebpageImageDialog = saveWebpageImageDialogFragment.getDialog();
 
-                // Add 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);
+                        // Remove the incorrect lint warning below that the dialog might be null.
+                        assert saveWebpageImageDialog != null;
 
-                    // Set the `ClipData` as the clipboard's primary clip.
-                    clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
-                    return false;
-                });
+                        // Get a handle for the file name edit text.
+                        EditText fileNameEditText = saveWebpageImageDialog.findViewById(R.id.file_name_edittext);
 
-                // Add an Open with App entry.
-                menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithApp(imageUrl);
-                    return false;
-                });
+                        // Instantiate the file name helper.
+                        FileNameHelper fileNameHelper = new FileNameHelper();
 
-                // Add an Open with Browser entry.
-                menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
-                    openWithBrowser(imageUrl);
-                    return false;
-                });
+                        // Get the file path if it isn't null.
+                        if (data.getData() != null) {
+                            // Convert the file name URI to a file name path.
+                            String fileNamePath = fileNameHelper.convertUriToFileNamePath(data.getData());
 
-                // Add a `Cancel` entry, which by default closes the `ContextMenu`.
-                menu.add(R.string.cancel);
+                            // Set the file name path as the text of the file name edit text.
+                            fileNameEditText.setText(fileNamePath);
+                        }
+                    }
+                }
                 break;
         }
     }
 
-    @Override
-    public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
-        // Get a handle for the bookmarks list view.
-        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+    private void loadUrlFromTextBox() {
+        // Get a handle for the URL edit text.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-        // Get the views from the dialog fragment.
-        EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
-        EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
+        // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
+        String unformattedUrlString = urlEditText.getText().toString().trim();
 
-        // Extract the strings from the edit texts.
-        String bookmarkNameString = createBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
+        // Initialize the formatted URL string.
+        String url = "";
 
-        // Create a favorite icon byte array output stream.
-        ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
+        // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
+        if (unformattedUrlString.startsWith("content://")) {  // This is a Content URL.
+            // Load the entire content URL.
+            url = unformattedUrlString;
+        } else if (Patterns.WEB_URL.matcher(unformattedUrlString).matches() || unformattedUrlString.startsWith("http://") || unformattedUrlString.startsWith("https://") ||
+                unformattedUrlString.startsWith("file://")) {  // This is a standard URL.
+            // Add `https://` at the beginning if there is no protocol.  Otherwise the app will segfault.
+            if (!unformattedUrlString.startsWith("http") && !unformattedUrlString.startsWith("file://") && !unformattedUrlString.startsWith("content://")) {
+                unformattedUrlString = "https://" + unformattedUrlString;
+            }
 
-        // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-        favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
+            // Initialize `unformattedUrl`.
+            URL unformattedUrl = null;
+
+            // Convert `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();
+            }
+
+            // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
+            String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
+            String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
+            String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
+            String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
+            String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
 
-        // Convert the favorite icon byte array stream to a byte array.
-        byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
+            // Build the URI.
+            Uri.Builder uri = new Uri.Builder();
+            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
 
-        // Display the new bookmark below the current items in the (0 indexed) list.
-        int newBookmarkDisplayOrder = bookmarksListView.getCount();
+            // 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;
 
-        // Create the bookmark.
-        bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
+            // Sanitize the search input.
+            try {
+                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+            } catch (UnsupportedEncodingException exception) {
+                encodedUrlString = "";
+            }
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+            // Add the base search URL.
+            url = searchURL + encodedUrlString;
+        }
 
-        // Update the list view.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+        // 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();
 
-        // Scroll to the new bookmark.
-        bookmarksListView.setSelection(newBookmarkDisplayOrder);
+        // Make it so.
+        loadUrl(url);
     }
 
-    @Override
-    public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
-        // Get a handle for the bookmarks list view.
-        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
-
-        // Get handles for the views in the dialog fragment.
-        EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
-        RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
-        ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
+    private void loadUrl(String url) {
+        // Sanitize the URL.
+        url = sanitizeUrl(url);
 
-        // Get new folder name string.
-        String folderNameString = createFolderNameEditText.getText().toString();
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, true, false);
 
-        // Create a folder icon bitmap.
-        Bitmap folderIconBitmap;
+        // Load the URL.
+        currentWebView.loadUrl(url, customHeaders);
+    }
 
-        // 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();
+    public void findPreviousOnPage(View view) {
+        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
+        currentWebView.findNext(false);
+    }
 
-            // Convert the folder icon drawable to a bitmap drawable.
-            BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+    public void findNextOnPage(View view) {
+        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
+        currentWebView.findNext(true);
+    }
 
-            // Convert the 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;
-        }
+    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);
 
-        // Create a folder icon byte array output stream.
-        ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
+        // Delete the contents of `find_on_page_edittext`.
+        findOnPageEditText.setText(null);
 
-        // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
-        folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
+        // Clear the highlighted phrases if the WebView is not null.
+        if (currentWebView != null) {
+            currentWebView.clearMatches();
+        }
 
-        // Convert the folder icon byte array stream to a byte array.
-        byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
+        // Hide the find on page linear layout.
+        findOnPageLinearLayout.setVisibility(View.GONE);
 
-        // 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);
-        }
+        // Show the toolbar.
+        toolbar.setVisibility(View.VISIBLE);
 
-        // Create the folder, which will be placed at the top of the `ListView`.
-        bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
+        // Get a handle for the input method manager.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+        // Hide the keyboard.
+        inputMethodManager.hideSoftInputFromWindow(toolbar.getWindowToken(), 0);
+    }
 
-        // Scroll to the new folder.
-        bookmarksListView.setSelection(0);
+    @Override
+    public void onSaveWebpageImage(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.
+        saveWebsiteImageFilePath = fileNameEditText.getText().toString();
+
+        // Check to see if the storage permission is needed.
+        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // The storage permission has been granted.
+            // Save the webpage image.
+            new SaveWebpageImage(this, currentWebView).execute(saveWebsiteImageFilePath);
+        } else {  // The storage permission has not been granted.
+            // Get the external private directory `File`.
+            File externalPrivateDirectoryFile = getExternalFilesDir(null);
+
+            // Remove the incorrect lint error below that the file might be null.
+            assert externalPrivateDirectoryFile != null;
+
+            // Get the external private directory string.
+            String externalPrivateDirectory = externalPrivateDirectoryFile.toString();
+
+            // Check to see if the file path is in the external private directory.
+            if (saveWebsiteImageFilePath.startsWith(externalPrivateDirectory)) {  // The file path is in the external private directory.
+                // Save the webpage image.
+                new SaveWebpageImage(this, currentWebView).execute(saveWebsiteImageFilePath);
+            } else {  // The file path is in a public directory.
+                // Check if the user has previously denied the storage permission.
+                if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
+                    // Instantiate the storage permission alert dialog.
+                    DialogFragment storagePermissionDialogFragment = new StoragePermissionDialog();
+
+                    // Show the storage permission alert dialog.  The permission will be requested when the dialog is closed.
+                    storagePermissionDialogFragment.show(getSupportFragmentManager(), getString(R.string.storage_permission));
+                } else {  // Show the permission request directly.
+                    // Request the write external storage permission.  The webpage image will be saved when it finishes.
+                    ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, SAVE_WEBPAGE_IMAGE_REQUEST_CODE);
+                }
+            }
+        }
     }
 
     @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);
+    public void onCloseStoragePermissionDialog() {
+        // Request the write external storage permission.  The webpage image will be saved when it finishes.
+        ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, SAVE_WEBPAGE_IMAGE_REQUEST_CODE);
+    }
 
-        // Store the bookmark strings.
-        String bookmarkNameString = editBookmarkNameEditText.getText().toString();
-        String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
+    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();
+        }
 
-        // 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();
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-            // 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);
+        // Store the values from the shared preferences in variables.
+        incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
+        boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
+        sanitizeGoogleAnalytics = sharedPreferences.getBoolean("google_analytics", true);
+        sanitizeFacebookClickIds = sharedPreferences.getBoolean("facebook_click_ids", true);
+        sanitizeTwitterAmpRedirects = sharedPreferences.getBoolean("twitter_amp_redirects", true);
+        proxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
+        fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
+        hideAppBar = sharedPreferences.getBoolean("hide_app_bar", true);
+        scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
 
-            // Convert the favorite icon byte array stream to a byte array.
-            byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
+        // 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);
 
-            //  Update the bookmark and the favorite icon.
-            bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
-        }
+        // Remove the incorrect lint warning below that the action bar might be null.
+        assert actionBar != null;
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+        // Apply the proxy through Orbot settings.
+        applyProxyThroughOrbot(false);
 
-        // Update the list view.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // Set Do Not Track status.
+        if (doNotTrackEnabled) {
+            customHeaders.put("DNT", "1");
+        } else {
+            customHeaders.remove("DNT");
+        }
 
-    @Override
-    public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
-        // Get handles for the views from `dialogFragment`.
-        EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
-        RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
-        RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
-        ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
+        // Get the current layout parameters.  Using coordinator layout parameters allows the `setBehavior()` command and using app bar layout parameters allows the `setScrollFlags()` command.
+        CoordinatorLayout.LayoutParams swipeRefreshLayoutParams = (CoordinatorLayout.LayoutParams) swipeRefreshLayout.getLayoutParams();
+        AppBarLayout.LayoutParams toolbarLayoutParams = (AppBarLayout.LayoutParams) toolbar.getLayoutParams();
+        AppBarLayout.LayoutParams findOnPageLayoutParams = (AppBarLayout.LayoutParams) findOnPageLinearLayout.getLayoutParams();
+        AppBarLayout.LayoutParams tabsLayoutParams = (AppBarLayout.LayoutParams) tabsLinearLayout.getLayoutParams();
+
+        // Add the scrolling behavior to the layout parameters.
+        if (scrollAppBar) {
+            // Enable scrolling of the app bar.
+            swipeRefreshLayoutParams.setBehavior(new AppBarLayout.ScrollingViewBehavior());
+            toolbarLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+            findOnPageLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+            tabsLayoutParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS | AppBarLayout.LayoutParams.SCROLL_FLAG_SNAP);
+        } else {
+            // Disable scrolling of the app bar.
+            swipeRefreshLayoutParams.setBehavior(null);
+            toolbarLayoutParams.setScrollFlags(0);
+            findOnPageLayoutParams.setScrollFlags(0);
+            tabsLayoutParams.setScrollFlags(0);
+
+            // Expand the app bar if it is currently collapsed.
+            appBarLayout.setExpanded(true);
+        }
 
-        // 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);
 
-                // Convert the folder icon bitmap drawable to a bitmap.
-                folderIconBitmap = folderIconBitmapDrawable.getBitmap();
-            } else {  // Use the `WebView` favorite icon.
-                // Copy the favorite icon bitmap to the folder icon bitmap.
-                folderIconBitmap = favoriteIconBitmap;
+                // Set the app bar scrolling.
+                nestedScrollWebView.setNestedScrollingEnabled(scrollAppBar);
             }
+        }
 
-            // Create a folder icon byte array output stream.
-            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+        // 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 to a byte array.  `0` is for lossless compression (the only option for a PNG).
-            folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
+                // Hide the action bar.
+                actionBar.hide();
+            } else {
+                // Show the tab linear layout.
+                tabsLinearLayout.setVisibility(View.VISIBLE);
 
-            // Convert the folder icon byte array stream to a byte array.
-            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+                // Show the action bar.
+                actionBar.show();
+            }
 
-            // 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();
+            // Hide the banner ad in the free flavor.
+            if (BuildConfig.FLAVOR.contentEquals("free")) {
+                AdHelper.hideAd(findViewById(R.id.adview));
+            }
 
-                // Convert the folder icon drawable to a bitmap drawable.
-                BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
+            // 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 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 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;
 
-            // Create a folder icon byte array output stream.
-            ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+            // Show the tab linear layout.
+            tabsLinearLayout.setVisibility(View.VISIBLE);
 
-            // 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 action bar.
+            actionBar.show();
+
+            // 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));
+            }
 
-            // Convert the folder icon byte array stream to a byte array.
-            byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+            // Remove the `SYSTEM_UI` flags from the root frame layout.
+            rootFrameLayout.setSystemUiVisibility(0);
 
-            // Update the folder name and icon in the database.
-            bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+            // Add the translucent status flag.
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
         }
+    }
 
-        // Update the bookmarks cursor with the current contents of this folder.
-        bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+    private void initializeApp() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        // Update the `ListView`.
-        bookmarksCursorAdapter.changeCursor(bookmarksCursor);
-    }
+        // Get the theme preference.
+        boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-    @Override
-    public void onCloseDownloadLocationPermissionDialog(int downloadType) {
-        switch (downloadType) {
-            case DownloadLocationPermissionDialog.DOWNLOAD_FILE:
-                // Request the WRITE_EXTERNAL_STORAGE permission with a file request code.
-                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
-                break;
+        // Get a handle for the input method.
+        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
 
-            case DownloadLocationPermissionDialog.DOWNLOAD_IMAGE:
-                // Request the WRITE_EXTERNAL_STORAGE permission with an image request code.
-                ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
-                break;
-        }
-    }
+        // Remove the lint warning below that the input method manager might be null.
+        assert inputMethodManager != null;
 
-    @Override
-    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
-        // Get a handle for the fragment manager.
-        FragmentManager fragmentManager = getSupportFragmentManager();
+        // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
+        redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
+        initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
+        finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
 
-        switch (requestCode) {
-            case DOWNLOAD_FILE_REQUEST_CODE:
-                // Show the download file alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
-                DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, downloadContentDisposition, downloadContentLength);
+        // Get handles for the URL views.
+        EditText urlEditText = findViewById(R.id.url_edittext);
 
-                // On API 23, displaying the fragment must be delayed or the app will crash.
-                if (Build.VERSION.SDK_INT == 23) {
-                    new Handler().postDelayed(() -> downloadFileDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
-                } else {
-                    downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
-                }
+        // Remove the formatting from the URL edit text when the user is editing the text.
+        urlEditText.setOnFocusChangeListener((View v, boolean hasFocus) -> {
+            if (hasFocus) {  // The user is editing the URL text box.
+                // Remove the highlighting.
+                urlEditText.getText().removeSpan(redColorSpan);
+                urlEditText.getText().removeSpan(initialGrayColorSpan);
+                urlEditText.getText().removeSpan(finalGrayColorSpan);
+            } else {  // The user has stopped editing the URL text box.
+                // Move to the beginning of the string.
+                urlEditText.setSelection(0);
 
-                // Reset the download variables.
-                downloadUrl = "";
-                downloadContentDisposition = "";
-                downloadContentLength = 0;
-                break;
+                // Reapply the highlighting.
+                highlightUrlText();
+            }
+        });
 
-            case DOWNLOAD_IMAGE_REQUEST_CODE:
-                // Show the download image alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
-                DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(downloadImageUrl);
+        // Set the go button on the keyboard to load the URL in `urlTextBox`.
+        urlEditText.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
+            // If the event is a key-down event on the `enter` button, load the URL.
+            if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
+                // Load the URL into the mainWebView and consume the event.
+                loadUrlFromTextBox();
 
-                // On API 23, displaying the fragment must be delayed or the app will crash.
-                if (Build.VERSION.SDK_INT == 23) {
-                    new Handler().postDelayed(() -> downloadImageDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
-                } else {
-                    downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
-                }
+                // If the enter key was pressed, consume the event.
+                return true;
+            } else {
+                // If any other key was pressed, do not consume the event.
+                return false;
+            }
+        });
 
-                // Reset the image URL variable.
-                downloadImageUrl = "";
-                break;
-        }
-    }
+        // Initialize the Orbot status and the waiting for Orbot trackers.
+        orbotStatus = "unknown";
+        waitingForOrbot = false;
 
-    @Override
-    public void onDownloadImage(DialogFragment dialogFragment, String imageUrl) {
-        // Download the image if it has an HTTP or HTTPS URI.
-        if (imageUrl.startsWith("http")) {
-            // Get a handle for the system `DOWNLOAD_SERVICE`.
-            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
+        // Create an Orbot status `BroadcastReceiver`.
+        orbotStatusBroadcastReceiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                // Store the content of the status message in `orbotStatus`.
+                orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
 
-            // Parse `imageUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
+                // If Privacy Browser is waiting on Orbot, load the website now that Orbot is connected.
+                if (orbotStatus.equals("ON") && waitingForOrbot) {
+                    // Reset the waiting for Orbot status.
+                    waitingForOrbot = false;
 
-            // Get a handle for the cookie manager.
-            CookieManager cookieManager = CookieManager.getInstance();
+                    // Get the intent that started the app.
+                    Intent launchingIntent = getIntent();
 
-            // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
-            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
-            if (cookieManager.acceptCookie()) {
-                // Get the cookies for `imageUrl`.
-                String cookies = cookieManager.getCookie(imageUrl);
+                    // Get the information from the intent.
+                    String launchingIntentAction = launchingIntent.getAction();
+                    Uri launchingIntentUriData = launchingIntent.getData();
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
-            }
+                    // If the intent action is a web search, perform the search.
+                    if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
+                        // Create an encoded URL string.
+                        String encodedUrlString;
 
-            // Get the file name from the dialog fragment.
-            EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
-            String imageName = downloadImageNameEditText.getText().toString();
+                        // Sanitize the search input and convert it to a search.
+                        try {
+                            encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
+                        } catch (UnsupportedEncodingException exception) {
+                            encodedUrlString = "";
+                        }
 
-            // Specify the download location.
-            if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
-                // Download to the public download directory.
-                downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, imageName);
-            } else {  // External write permission denied.
-                // Download to the app's external download directory.
-                downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, imageName);
+                        // Load the completed search URL.
+                        loadUrl(searchURL + encodedUrlString);
+                    } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
+                        // Load the URL from the intent.
+                        loadUrl(launchingIntentUriData.toString());
+                    } else {  // The is no URL in the intent.
+                        // Select the homepage based on the proxy through Orbot status.
+                        if (proxyThroughOrbot) {
+                            // Load the Tor homepage.
+                            loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
+                        } else {
+                            // Load the normal homepage.
+                            loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
+                        }
+                    }
+                }
             }
+        };
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
+        // Register `orbotStatusBroadcastReceiver` on `this` context.
+        this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
 
-            // Add the URL as the description for the download.
-            downloadRequest.setDescription(imageUrl);
+        // Get handles for views that need to be modified.
+        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+        NavigationView navigationView = findViewById(R.id.navigationview);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
+        ViewPager webViewPager = findViewById(R.id.webviewpager);
+        ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
+        FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
+        FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
+        FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
+        EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
 
-            // Show the download notification after the download is completed.
-            downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+        // Listen for touches on the navigation menu.
+        navigationView.setNavigationItemSelectedListener(this);
 
-            // Remove the lint warning below that `downloadManager` might be `null`.
-            assert downloadManager != null;
+        // Get handles for the navigation menu and the back and forward menu items.  The menu is zero-based.
+        Menu navigationMenu = navigationView.getMenu();
+        MenuItem navigationBackMenuItem = navigationMenu.getItem(2);
+        MenuItem navigationForwardMenuItem = navigationMenu.getItem(3);
+        MenuItem navigationHistoryMenuItem = navigationMenu.getItem(4);
+        MenuItem navigationRequestsMenuItem = navigationMenu.getItem(5);
 
-            // Initiate the download.
-            downloadManager.enqueue(downloadRequest);
-        } else {  // The image is not an HTTP or HTTPS URI.
-            Snackbar.make(currentWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
-        }
-    }
+        // Update the web view pager every time a tab is modified.
+        webViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
+            @Override
+            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+                // Do nothing.
+            }
 
-    @Override
-    public void onDownloadFile(DialogFragment dialogFragment, String downloadUrl) {
-        // Download the file if it has an HTTP or HTTPS URI.
-        if (downloadUrl.startsWith("http")) {
-            // Get a handle for the system `DOWNLOAD_SERVICE`.
-            DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
+            @Override
+            public void onPageSelected(int position) {
+                // Close the find on page bar if it is open.
+                closeFindOnPage(null);
 
-            // Parse `downloadUrl`.
-            DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
+                // Set the current WebView.
+                setCurrentWebView(position);
 
-            // Get a handle for the cookie manager.
-            CookieManager cookieManager = CookieManager.getInstance();
+                // Select the corresponding tab if it does not match the currently selected page.  This will happen if the page was scrolled via swiping in the view pager or by creating a new tab.
+                if (tabLayout.getSelectedTabPosition() != position) {
+                    // Create a handler to select the tab.
+                    Handler selectTabHandler = new Handler();
 
-            // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
-            // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
-            if (cookieManager.acceptCookie()) {
-                // Get the cookies for `downloadUrl`.
-                String cookies = cookieManager.getCookie(downloadUrl);
+                    // Create a runnable to select the tab.
+                    Runnable selectTabRunnable = () -> {
+                        // Get a handle for the tab.
+                        TabLayout.Tab tab = tabLayout.getTabAt(position);
 
-                // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
-                downloadRequest.addRequestHeader("Cookie", cookies);
+                        // Assert that the tab is not null.
+                        assert tab != null;
+
+                        // Select the tab.
+                        tab.select();
+                    };
+
+                    // Select the tab layout after 150 milliseconds, which leaves enough time for a new tab to be inflated.
+                    selectTabHandler.postDelayed(selectTabRunnable, 150);
+                }
             }
 
-            // Get the file name from the dialog fragment.
-            EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
-            String fileName = downloadFileNameEditText.getText().toString();
+            @Override
+            public void onPageScrollStateChanged(int state) {
+                // Do nothing.
+            }
+        });
 
-            // 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);
+        // 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());
             }
 
-            // Allow `MediaScanner` to index the download if it is a media file.
-            downloadRequest.allowScanningByMediaScanner();
-
-            // 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
-    public void onPinnedMismatchBack() {  // TODO.  Move this logic to the dialog.
-        if (currentWebView.canGoBack()) {  // There is a back page in the history.
-            // Reset the current domain name so that navigation works if third-party requests are blocked.
-            currentWebView.resetCurrentDomainName();
-
-            // Set navigating history so that the domain settings are applied when the new URL is loaded.
-            currentWebView.setNavigatingHistory(true);
 
-            // Go back.
-            currentWebView.goBack();
-        } else {  // There are no pages to go back to.
-            // Load a blank page
-            loadUrl("");
-        }
-    }
+        // 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();
 
-    @Override
-    public void onPinnedMismatchProceed() {  // TODO.  Move this logic to the dialog.
-        // Do not check the pinned information for this domain again until the domain changes.
-        currentWebView.setIgnorePinnedDomainInformation(true);
-    }
+            // Create a favorite icon byte array output stream.
+            ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 
-    @Override
-    public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {  // TODO.  Move this logic to the dialog.
-        // Reset the current domain name so that navigation works if third-party requests are blocked.
-        currentWebView.resetCurrentDomainName();
+            // 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);
 
-        // Set navigating history so that the domain settings are applied when the new URL is loaded.
-        currentWebView.setNavigatingHistory(true);
+            // Convert the favorite icon byte array stream to a byte array.
+            byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 
-        // Load the history entry.
-        currentWebView.goBackOrForward(moveBackOrForwardSteps);
-    }
+            // Create an intent to launch the bookmarks activity.
+            Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
 
-    @Override
-    public void onClearHistory() {  // TODO.  Move this logic to the dialog.
-        // Clear the history.
-        currentWebView.clearHistory();
-    }
+            // 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);
 
-    // Override `onBackPressed` to handle the navigation drawer and and the WebView.
-    @Override
-    public void onBackPressed() {
-        // Get a handle for the drawer layout.
-        DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
+            // Make it so.
+            startActivity(bookmarksIntent);
+        });
 
-        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 create new bookmark folder FAB to display an alert dialog.
+        createBookmarkFolderFab.setOnClickListener(v -> {
+            // Create a create bookmark folder dialog.
+            DialogFragment createBookmarkFolderDialog = CreateBookmarkFolderDialog.createBookmarkFolder(currentWebView.getFavoriteOrDefaultIcon());
 
-                // Load 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();
+            // Show the create bookmark folder dialog.
+            createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
+        });
 
-            // Set navigating history so that the domain settings are applied when the new URL is loaded.
-            currentWebView.setNavigatingHistory(true);
+        // 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());
 
-            // Go back.
-            currentWebView.goBack();
-        } else {  // There isn't anything to do in Privacy Browser.
-            // Pass `onBackPressed()` to the system.
-            super.onBackPressed();
-        }
-    }
+            // Display the create bookmark dialog.
+            createBookmarkDialog.show(getSupportFragmentManager(), getString(R.string.create_bookmark));
+        });
 
-    // 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));
-        }
-    }
+        // 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.
+            }
 
-    private void loadUrlFromTextBox() {
-        // Get a handle for the URL edit text.
-        EditText urlEditText = findViewById(R.id.url_edittext);
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+                // Do nothing.
+            }
 
-        // 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();
+            @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());
+                }
+            }
+        });
 
-        // Initialize the formatted URL string.
-        String url = "";
+        // 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);
 
-        // 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;
+                // Consume the event.
+                return true;
+            } else {  // A different key was pressed.
+                // Do not consume the event.
+                return false;
             }
+        });
 
-            // Initialize `unformattedUrl`.
-            URL unformattedUrl = null;
+        // Implement swipe to refresh.
+        swipeRefreshLayout.setOnRefreshListener(() -> currentWebView.reload());
 
-            // 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();
-            }
+        // Store the default progress view offsets for use later in `initializeWebView()`.
+        defaultProgressViewStartOffset = swipeRefreshLayout.getProgressViewStartOffset();
+        defaultProgressViewEndOffset = swipeRefreshLayout.getProgressViewEndOffset();
 
-            // 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 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);
+        }
 
-            // Build the URI.
-            Uri.Builder uri = new Uri.Builder();
-            uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+        // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
+        drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
+        drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
 
-            // 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;
+        // 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);
 
-            // Sanitize the search input.
-            try {
-                encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
-            } catch (UnsupportedEncodingException exception) {
-                encodedUrlString = "";
-            }
+        // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
+        currentBookmarksFolder = "";
 
-            // Add the base search URL.
-            url = searchURL + encodedUrlString;
-        }
+        // Load the home folder, which is `""` in the database.
+        loadBookmarksFolder();
 
-        // 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();
+        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;
 
-        // Make it so.
-        loadUrl(url);
-    }
+            // Get the bookmark cursor for this ID.
+            Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseId);
 
-    private void loadUrl(String url) {
-        // Apply the domain settings.
-        applyDomainSettings(currentWebView, url, true, false);
+            // Move the bookmark cursor to the first row.
+            bookmarkCursor.moveToFirst();
 
-        // Load the URL.
-        currentWebView.loadUrl(url, customHeaders);
-    }
+            // 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));
 
-    public void findPreviousOnPage(View view) {
-        // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
-        currentWebView.findNext(false);
-    }
+                // 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)));
 
-    public void findNextOnPage(View view) {
-        // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
-        currentWebView.findNext(true);
-    }
+                // Close the bookmarks drawer.
+                drawerLayout.closeDrawer(GravityCompat.END);
+            }
 
-    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);
+            // Close the `Cursor`.
+            bookmarkCursor.close();
+        });
+
+        bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
+            // Convert the database ID from `long` to `int`.
+            int databaseId = (int) id;
 
-        // Delete the contents of `find_on_page_edittext`.
-        findOnPageEditText.setText(null);
+            // Find out if the selected bookmark is a folder.
+            boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
 
-        // Clear the highlighted phrases.
-        currentWebView.clearMatches();
+            if (isFolder) {
+                // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
+                oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 
-        // Hide the find on page linear layout.
-        findOnPageLinearLayout.setVisibility(View.GONE);
+                // Instantiate the edit folder bookmark dialog.
+                DialogFragment editBookmarkFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, currentWebView.getFavoriteOrDefaultIcon());
 
-        // Show the toolbar.
-        toolbar.setVisibility(View.VISIBLE);
+                // 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);
 
-        // Get a handle for the input method manager.
-        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+                // Move the bookmark cursor to the first row.
+                bookmarkCursor.moveToFirst();
 
-        // Remove the lint warning below that the input method manager might be null.
-        assert inputMethodManager != null;
+                // 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);
+            }
 
-        // Hide the keyboard.
-        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
-    }
+            // Consume the event.
+            return true;
+        });
 
-    private void applyAppSettings() {
-        // Get a handle for the shared preferences.
-        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+        // Get the status bar pixel size.
+        int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
+        int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
 
-        // 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);
+        // Get the resource density.
+        float screenDensity = getResources().getDisplayMetrics().density;
 
-        // Get handles for the views that need to be modified.  `getSupportActionBar()` must be used until the minimum API >= 21.
-        FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
-        ActionBar actionBar = getSupportActionBar();
+        // 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);
 
-        // Remove the incorrect lint warnings below that the action bar might be null.
-        assert actionBar != null;
+        // The drawer listener is used to update the navigation menu.`
+        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
+            @Override
+            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
+            }
 
-        // Apply the proxy through Orbot settings.
-        applyProxyThroughOrbot(false);
+            @Override
+            public void onDrawerOpened(@NonNull View drawerView) {
+            }
 
-        // Set Do Not Track status.
-        if (doNotTrackEnabled) {
-            customHeaders.put("DNT", "1");
-        } else {
-            customHeaders.remove("DNT");
-        }
+            @Override
+            public void onDrawerClosed(@NonNull View drawerView) {
+            }
 
-        // Set the app bar scrolling for each WebView.
-        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
-            // Get the WebView tab fragment.
-            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+            @Override
+            public void onDrawerStateChanged(int newState) {
+                if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
+                    // Get handles for the drawer headers.
+                    TextView navigationHeaderTextView = findViewById(R.id.navigationText);
+                    TextView bookmarksHeaderTextView = findViewById(R.id.bookmarks_title_textview);
 
-            // Get the fragment view.
-            View fragmentView = webViewTabFragment.getView();
+                    // 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);
+                    }
 
-            // 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);
+                    // Apply the bookmarks header paddings if the view is not null (sometimes it is null if another activity has already started).  This moves the text in the header below any cutouts.
+                    if (bookmarksHeaderTextView != null) {
+                        bookmarksHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
+                    }
 
-                // Set the app bar scrolling.
-                nestedScrollWebView.setNestedScrollingEnabled(sharedPreferences.getBoolean("scroll_app_bar", true));
-            }
-        }
+                    // 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));
 
-        // 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) {
-                actionBar.hide();
-            } else {
-                actionBar.show();
-            }
+                        // Hide the keyboard (if displayed).
+                        inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+                    }
 
-            // Hide the banner ad in the free flavor.
-            if (BuildConfig.FLAVOR.contentEquals("free")) {
-                AdHelper.hideAd(findViewById(R.id.adview));
+                    // 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 app bar.
-            actionBar.show();
+        // Get a handle for the WebView.
+        WebView bareWebView = webViewLayout.findViewById(R.id.bare_webview);
 
-            // 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));
-            }
+        // Store the default user agent.
+        webViewDefaultUserAgent = bareWebView.getSettings().getUserAgentString();
 
-            // Remove the `SYSTEM_UI` flags from the root frame layout.
-            rootFrameLayout.setSystemUiVisibility(0);
+        // Destroy the bare WebView.
+        bareWebView.destroy();
+    }
 
-            // Add the translucent status flag.
-            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
-        }
+    @Override
+    public void navigateHistory(String url, int steps) {
+        // Apply the domain settings.
+        applyDomainSettings(currentWebView, url, false, false);
+
+        // 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")
-    private boolean applyDomainSettings(NestedScrollWebView nestedScrollWebView, String url, boolean resetFavoriteIcon, boolean reloadWebsite) {
+    private boolean applyDomainSettings(NestedScrollWebView nestedScrollWebView, String url, boolean resetTab, boolean reloadWebsite) {
         // 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);
 
@@ -3348,8 +3806,8 @@ 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);
 
@@ -3361,30 +3819,37 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             nestedScrollWebView.clearPinnedIpAddresses();
 
             // Reset the favorite icon if specified.
-            if (resetFavoriteIcon) {
+            if (resetTab) {
                 // Initialize the favorite icon.
                 nestedScrollWebView.initializeFavoriteIcon();
 
+                // Get the current page position.
+                int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
+
                 // Get a handle for the tab layout.
                 TabLayout tabLayout = findViewById(R.id.tablayout);
 
-                // Get the current tab.
-                TabLayout.Tab currentTab = tabLayout.getTabAt(tabLayout.getSelectedTabPosition());  // TODO.  We need to get the tab for this WebView, which might not be the current tab.
+                // Get the corresponding tab.
+                TabLayout.Tab tab = tabLayout.getTabAt(currentPagePosition);
 
-                // Remove the warning below that the current tab might be null.
-                assert currentTab != null;
+                // Update the tab if it isn't null, which sometimes happens when restarting from the background.
+                if (tab != null) {
+                    // Get the tab custom view.
+                    View tabCustomView = tab.getCustomView();
 
-                // Get the current tab custom view.
-                View currentTabCustomView = currentTab.getCustomView();
+                    // Remove the warning below that the tab custom view might be null.
+                    assert tabCustomView != null;
 
-                // Remove the warning below that the current tab custom view might be null.
-                assert currentTabCustomView != null;
+                    // Get the tab views.
+                    ImageView tabFavoriteIconImageView = tabCustomView.findViewById(R.id.favorite_icon_imageview);
+                    TextView tabTitleTextView = tabCustomView.findViewById(R.id.title_textview);
 
-                // Get the current tab favorite icon image view.
-                ImageView currentTabFavoriteIconImageView = currentTabCustomView.findViewById(R.id.favorite_icon_imageview);
+                    // Set the default favorite icon as the favorite icon for this tab.
+                    tabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(nestedScrollWebView.getFavoriteOrDefaultIcon(), 64, 64, true));
 
-                // Set the default favorite icon as the favorite icon for this tab.
-                currentTabFavoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(nestedScrollWebView.getFavoriteOrDefaultIcon(), 64, 64, true));
+                    // Set the loading title text.
+                    tabTitleTextView.setText(R.string.loading);
+                }
             }
 
             // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
@@ -3448,8 +3913,9 @@ 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();
@@ -3475,15 +3941,16 @@ 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);
@@ -3491,6 +3958,7 @@ 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));
@@ -3533,17 +4001,17 @@ 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;
@@ -3581,59 +4049,55 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     nestedScrollWebView.getSettings().setTextZoom(fontSize);
                 }
 
-                // Only set the user agent if the webpage is not currently loading.  Otherwise, changing the user agent on redirects can cause the original website to reload.
-                // <https://redmine.stoutner.com/issues/160>
-                if (nestedScrollWebView.getProgress() == 100) {  // A URL is not loading.
-                    // Set the user agent.
-                    if (userAgentName.equals(getString(R.string.system_default_user_agent))) {  // Use the system default user agent.
-                        // Get the array position of the default user agent name.
-                        int defaultUserAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
-
-                        // Set the user agent according to the system default.
-                        switch (defaultUserAgentArrayPosition) {
-                            case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
-                                // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
-                                nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
-                                break;
-
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                nestedScrollWebView.getSettings().setUserAgentString("");
-                                break;
-
-                            case SETTINGS_CUSTOM_USER_AGENT:
-                                // Set the default custom user agent.
-                                nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
-                                break;
-
-                            default:
-                                // Get the user agent string from the user agent data array
-                                nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[defaultUserAgentArrayPosition]);
-                        }
-                    } else {  // Set the user agent according to the stored name.
-                        // Get the array position of the user agent name.
-                        int userAgentArrayPosition = userAgentNamesArray.getPosition(userAgentName);
-
-                        switch (userAgentArrayPosition) {
-                            case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
-                                nestedScrollWebView.getSettings().setUserAgentString(userAgentName);
-                                break;
-
-                            case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
-                                // Set the user agent to `""`, which uses the default value.
-                                nestedScrollWebView.getSettings().setUserAgentString("");
-                                break;
-
-                            default:
-                                // Get the user agent string from the user agent data array.
-                                nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
-                        }
+                // Set the user agent.
+                if (userAgentName.equals(getString(R.string.system_default_user_agent))) {  // Use the system default user agent.
+                    // Get the array position of the default user agent name.
+                    int defaultUserAgentArrayPosition = userAgentNamesArray.getPosition(defaultUserAgentName);
+
+                    // Set the user agent according to the system default.
+                    switch (defaultUserAgentArrayPosition) {
+                        case UNRECOGNIZED_USER_AGENT:  // The default user agent name is not on the canonical list.
+                            // This is probably because it was set in an older version of Privacy Browser before the switch to persistent user agent names.
+                            nestedScrollWebView.getSettings().setUserAgentString(defaultUserAgentName);
+                            break;
+
+                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Set the user agent to `""`, which uses the default value.
+                            nestedScrollWebView.getSettings().setUserAgentString("");
+                            break;
+
+                        case SETTINGS_CUSTOM_USER_AGENT:
+                            // Set the default custom user agent.
+                            nestedScrollWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+                            break;
+
+                        default:
+                            // Get the user agent string from the user agent data array
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[defaultUserAgentArrayPosition]);
+                    }
+                } else {  // Set the user agent according to the stored name.
+                    // Get the array position of the user agent name.
+                    int userAgentArrayPosition = userAgentNamesArray.getPosition(userAgentName);
+
+                    switch (userAgentArrayPosition) {
+                        case UNRECOGNIZED_USER_AGENT:  // The user agent name contains a custom user agent.
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentName);
+                            break;
+
+                        case SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Set the user agent to `""`, which uses the default value.
+                            nestedScrollWebView.getSettings().setUserAgentString("");
+                            break;
+
+                        default:
+                            // Get the user agent string from the user agent data array.
+                            nestedScrollWebView.getSettings().setUserAgentString(userAgentDataArray[userAgentArrayPosition]);
                     }
                 }
 
                 // Set swipe to refresh.
                 switch (swipeToRefreshInt) {
-                    case DomainsDatabaseHelper.SWIPE_TO_REFRESH_SYSTEM_DEFAULT:
+                    case DomainsDatabaseHelper.SYSTEM_DEFAULT:
                         // Store the swipe to refresh status in the nested scroll WebView.
                         nestedScrollWebView.setSwipeToRefresh(defaultSwipeToRefresh);
 
@@ -3641,7 +4105,7 @@ 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);
 
@@ -3649,7 +4113,7 @@ 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);
 
@@ -3657,17 +4121,32 @@ 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;
                 }
@@ -3685,11 +4164,12 @@ 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));
 
@@ -3725,35 +4205,34 @@ 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);
 
@@ -3788,11 +4267,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         String searchCustomUrlString = sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value));
         boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
-        // Get a handle for the action bar.  `getSupportActionBar()` must be used until the minimum API >= 21.
-        ActionBar actionBar = getSupportActionBar();
-
-        // Remove the incorrect lint warning later that the action bar might be null.
-        assert actionBar != null;
+        // Get a handle for the app bar layout.
+        AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
 
         // Set the homepage, search, and proxy options.
         if (proxyThroughOrbot) {  // Set the Tor options.
@@ -3806,11 +4282,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
             OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
 
-            // Set the `appBar` background to indicate proxying through Orbot is enabled.
+            // Set the app bar background to indicate proxying through Orbot is enabled.
             if (darkTheme) {
-                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.dark_blue_30));
+                appBarLayout.setBackgroundResource(R.color.dark_blue_30);
             } else {
-                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
+                appBarLayout.setBackgroundResource(R.color.blue_50);
             }
 
             // Check to see if Orbot is ready.
@@ -3838,11 +4314,11 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Reset the proxy to default.  The host is `""` and the port is `"0"`.
             OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
 
-            // Set the default `appBar` background.
+            // Set the default app bar layout background.
             if (darkTheme) {
-                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_900));
+                appBarLayout.setBackgroundResource(R.color.gray_900);
             } else {
-                actionBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_100));
+                appBarLayout.setBackgroundResource(R.color.gray_100);
             }
 
             // Reset `waitingForOrbot.
@@ -4082,25 +4558,105 @@ 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) {
+        // Create the open with intent with `ACTION_VIEW`.
+        Intent openWithBrowserIntent = new Intent(Intent.ACTION_VIEW);
+
+        // Set the URI and the MIME type.  `"text/html"` should load browser options.
+        openWithBrowserIntent.setDataAndType(Uri.parse(url), "text/html");
+
+        // Flag the intent to open in a new task.
+        openWithBrowserIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+        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 void openWithBrowser(String url) {
-        // Create the open with intent with `ACTION_VIEW`.
-        Intent openWithBrowserIntent = new Intent(Intent.ACTION_VIEW);
+    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"));
+            }
+        }
 
-        // Set the URI and the MIME type.  `"text/html"` should load browser options.
-        openWithBrowserIntent.setDataAndType(Uri.parse(url), "text/html");
+        // Return the sanitized URL.
+        return url;
+    }
 
-        // Flag the intent to open in a new task.
-        openWithBrowserIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+    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);
 
-        // Show the chooser.
-        startActivity(openWithBrowserIntent);
+        // 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);
@@ -4118,10 +4674,221 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
         assert newTab != null;
 
         // Set a custom view on the new tab.
-        newTab.setCustomView(R.layout.custom_tab_view);
+        newTab.setCustomView(R.layout.tab_custom_view);
 
         // Add the new WebView page.
-        webViewPagerAdapter.addPage(newTabNumber, webViewPager);
+        webViewPagerAdapter.addPage(newTabNumber, webViewPager, url, moveToTab);
+    }
+
+    public void closeTab(View view) {
+        // Get a handle for the tab layout.
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+
+        // Run the command according to the number of tabs.
+        if (tabLayout.getTabCount() > 1) {  // There is more than one tab open.
+            // Close the current tab.
+            closeCurrentTab();
+        } else {  // There is only one tab open.
+            clearAndExit();
+        }
+    }
+
+    private void closeCurrentTab() {
+        // Get handles for the views.
+        AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
+        TabLayout tabLayout = findViewById(R.id.tablayout);
+        ViewPager webViewPager = findViewById(R.id.webviewpager);
+
+        // Get the current tab number.
+        int currentTabNumber = tabLayout.getSelectedTabPosition();
+
+        // Delete the current tab.
+        tabLayout.removeTabAt(currentTabNumber);
+
+        // Delete the current page.  If the selected page number did not change during the delete, it will return true, meaning that the current WebView must be reset.
+        if (webViewPagerAdapter.deletePage(currentTabNumber, webViewPager)) {
+            setCurrentWebView(currentTabNumber);
+        }
+
+        // Expand the app bar if it is currently collapsed.
+        appBarLayout.setExpanded(true);
+    }
+
+    private void clearAndExit() {
+        // Get a handle for the shared preferences.
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
+
+        // Close the bookmarks cursor and database.
+        bookmarksCursor.close();
+        bookmarksDatabaseHelper.close();
+
+        // Get the status of the clear everything preference.
+        boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
+
+        // Get a handle for the runtime.
+        Runtime runtime = Runtime.getRuntime();
+
+        // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
+        // which links to `/data/data/com.stoutner.privacybrowser.standard`.
+        String privateDataDirectoryString = getApplicationInfo().dataDir;
+
+        // Clear cookies.
+        if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
+            // The command to remove cookies changed slightly in API 21.
+            if (Build.VERSION.SDK_INT >= 21) {
+                CookieManager.getInstance().removeAllCookies(null);
+            } else {
+                CookieManager.getInstance().removeAllCookie();
+            }
+
+            // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+            try {
+                // Two commands must be used because `Runtime.exec()` does not like `*`.
+                Process deleteCookiesProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
+                Process deleteCookiesJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
+
+                // Wait until the processes have finished.
+                deleteCookiesProcess.waitFor();
+                deleteCookiesJournalProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Clear DOM storage.
+        if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
+            // Ask `WebStorage` to clear the DOM storage.
+            WebStorage webStorage = WebStorage.getInstance();
+            webStorage.deleteAllData();
+
+            // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+            try {
+                // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                Process deleteLocalStorageProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
+
+                // Multiple commands must be used because `Runtime.exec()` does not like `*`.
+                Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
+                Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
+                Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
+                Process deleteDatabaseProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
+
+                // Wait until the processes have finished.
+                deleteLocalStorageProcess.waitFor();
+                deleteIndexProcess.waitFor();
+                deleteQuotaManagerProcess.waitFor();
+                deleteQuotaManagerJournalProcess.waitFor();
+                deleteDatabaseProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Clear form data if the API < 26.
+        if ((Build.VERSION.SDK_INT < 26) && (clearEverything || sharedPreferences.getBoolean("clear_form_data", true))) {
+            WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
+            webViewDatabase.clearFormData();
+
+            // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
+            try {
+                // A string array must be used because the database contains a space and `Runtime.exec` will not otherwise escape the string correctly.
+                Process deleteWebDataProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
+                Process deleteWebDataJournalProcess = runtime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
+
+                // Wait until the processes have finished.
+                deleteWebDataProcess.waitFor();
+                deleteWebDataJournalProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Clear the cache.
+        if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
+            // Clear the cache from each WebView.
+            for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+                // Get the WebView tab fragment.
+                WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+
+                // Get the fragment view.
+                View fragmentView = webViewTabFragment.getView();
+
+                // Only clear the cache if the WebView exists.
+                if (fragmentView != null) {
+                    // Get the nested scroll WebView from the tab fragment.
+                    NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                    // Clear the cache for this WebView.
+                    nestedScrollWebView.clearCache(true);
+                }
+            }
+
+            // Manually delete the cache directories.
+            try {
+                // Delete the main cache directory.
+                Process deleteCacheProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/cache");
+
+                // Delete the secondary `Service Worker` cache directory.
+                // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
+                Process deleteServiceWorkerProcess = runtime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
+
+                // Wait until the processes have finished.
+                deleteCacheProcess.waitFor();
+                deleteServiceWorkerProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Wipe out each WebView.
+        for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
+            // Get the WebView tab fragment.
+            WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
+
+            // Get the fragment view.
+            View fragmentView = webViewTabFragment.getView();
+
+            // Only wipe out the WebView if it exists.
+            if (fragmentView != null) {
+                // Get the nested scroll WebView from the tab fragment.
+                NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
+
+                // Clear SSL certificate preferences for this WebView.
+                nestedScrollWebView.clearSslPreferences();
+
+                // Clear the back/forward history for this WebView.
+                nestedScrollWebView.clearHistory();
+
+                // Destroy the internal state of `mainWebView`.
+                nestedScrollWebView.destroy();
+            }
+        }
+
+        // Clear the custom headers.
+        customHeaders.clear();
+
+        // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
+        // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
+        if (clearEverything) {
+            try {
+                // Delete the folder.
+                Process deleteAppWebviewProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
+
+                // Wait until the process has finished.
+                deleteAppWebviewProcess.waitFor();
+            } catch (Exception exception) {
+                // Do nothing if an error is thrown.
+            }
+        }
+
+        // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
+        if (Build.VERSION.SDK_INT >= 21) {
+            finishAndRemoveTask();
+        } else {
+            finish();
+        }
+
+        // Remove the terminated program from RAM.  The status code is `0`.
+        System.exit(0);
     }
 
     private void setCurrentWebView(int pageNumber) {
@@ -4136,7 +4903,7 @@ 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.
@@ -4146,19 +4913,14 @@ 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);
@@ -4173,23 +4935,43 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             // Update the privacy icons.  `true` redraws the icons in the app bar.
             updatePrivacyIcons(true);
 
-            // Clear the focus from the URL text box.
-            urlEditText.clearFocus();
-
             // 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;
 
-            // Hide the soft keyboard.
-            inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+            // Get the current URL.
+            String url = currentWebView.getUrl();
+
+            // Update the URL edit text if not loading a new intent.  Otherwise, this will be handled by `onPageStarted()` (if called) and `onPageFinished()`.
+            if (!loadingNewIntent) {  // A new intent is not being loaded.
+                if ((url == null) || url.equals("about:blank")) {  // The WebView is blank.
+                    // Display the hint in the URL edit text.
+                    urlEditText.setText("");
+
+                    // Request focus for the URL text box.
+                    urlEditText.requestFocus();
 
-            // Display the current URL in the URL text box.
-            urlEditText.setText(currentWebView.getUrl());
+                    // Display the keyboard.
+                    inputMethodManager.showSoftInput(urlEditText, 0);
+                } else {  // The WebView has a loaded URL.
+                    // Clear the focus from the URL text box.
+                    urlEditText.clearFocus();
+
+                    // Hide the soft keyboard.
+                    inputMethodManager.hideSoftInputFromWindow(currentWebView.getWindowToken(), 0);
+
+                    // Display the current URL in the URL text box.
+                    urlEditText.setText(url);
 
-            // Highlight the URL text.
-            highlightUrlText();
+                    // Highlight the URL text.
+                    highlightUrlText();
+                }
+            } else {  // A new intent is being loaded.
+                // Reset the loading new intent tracker.
+                loadingNewIntent = false;
+            }
 
             // Set the background to indicate the domain settings status.
             if (currentWebView.getDomainSettingsApplied()) {
@@ -4202,21 +4984,34 @@ 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);
         RelativeLayout mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
         ActionBar actionBar = getSupportActionBar();
+        LinearLayout tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
         EditText urlEditText = findViewById(R.id.url_edittext);
         TabLayout tabLayout = findViewById(R.id.tablayout);
         SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 
-        // Remove the incorrect lint warnings below that the some of the views might be null.
+        // Remove the incorrect lint warning below that the action bar might be null.
         assert actionBar != null;
 
         // Get a handle for the activity
@@ -4226,7 +5021,7 @@ 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;
@@ -4234,9 +5029,6 @@ 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();
 
@@ -4254,9 +5046,6 @@ 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);
 
@@ -4274,9 +5063,25 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                     // Toggle the full screen browsing mode.
                     if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
+                        // Store the swipe refresh layout top padding.
+                        swipeRefreshLayoutPaddingTop = swipeRefreshLayout.getPaddingTop();
+
                         // Hide the app bar if specified.
                         if (hideAppBar) {
+                            // Close the find on page bar if it is visible.
+                            closeFindOnPage(null);
+
+                            // Hide the tab linear layout.
+                            tabsLinearLayout.setVisibility(View.GONE);
+
+                            // Hide the action bar.
                             actionBar.hide();
+
+                            // Check to see if app bar scrolling is disabled.
+                            if (!scrollAppBar) {
+                                // Remove the padding from the top of the swipe refresh layout.
+                                swipeRefreshLayout.setPadding(0, 0, 0, 0);
+                            }
                         }
 
                         // Hide the banner ad in the free flavor.
@@ -4296,9 +5101,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
                                 View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
                     } else {  // Switch to normal viewing mode.
-                        // Show the app bar.
+                        // Show the tab linear layout.
+                        tabsLinearLayout.setVisibility(View.VISIBLE);
+
+                        // Show the action bar.
                         actionBar.show();
 
+                        // Check to see if app bar scrolling is disabled.
+                        if (!scrollAppBar) {
+                            // Add the padding from the top of the swipe refresh layout.
+                            swipeRefreshLayout.setPadding(0, swipeRefreshLayoutPaddingTop, 0, 0);
+                        }
+
                         // Show the banner ad in the free flavor.
                         if (BuildConfig.FLAVOR.contentEquals("free")) {
                             // Reload the ad.
@@ -4333,14 +5147,14 @@ 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);
@@ -4353,7 +5167,7 @@ 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;
 
@@ -4370,7 +5184,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     }
                 } else {  // The storage permission has already been granted.
                     // Get a handle for the download file alert dialog.
-                    DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
+                    DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, contentDisposition, contentLength);
 
                     // Show the download file alert dialog.
                     downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
@@ -4401,15 +5215,27 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             }
         });
 
-        if (Build.VERSION.SDK_INT >= 23) {
-            nestedScrollWebView.setOnScrollChangeListener((View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) -> {
-                // Update the status of swipe to refresh if it is enabled.
-                if (nestedScrollWebView.getSwipeToRefresh()) {
-                    // Only enable swipe to refresh if the WebView is scrolled to the top.
-                    swipeRefreshLayout.setEnabled(scrollY == 0);
-                }
-            });
-        }
+        // Update the status of swipe to refresh based on the scroll position of the nested scroll WebView.  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.
         nestedScrollWebView.setWebChromeClient(new WebChromeClient() {
@@ -4417,7 +5243,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
             @Override
             public void onProgressChanged(WebView view, int progress) {
                 // Inject the night mode CSS if night mode is enabled.
-                if (nestedScrollWebView.getNightMode()) {
+                if (nestedScrollWebView.getNightMode()) {  // Night mode is enabled.
                     // `background-color: #212121` sets the background to be dark gray.  `color: #BDBDBD` sets the text color to be light gray.  `box-shadow: none` removes a lower underline on links
                     // used by WordPress.  `text-decoration: none` removes all text underlines.  `text-shadow: none` removes text shadows, which usually have a hard coded color.
                     // `border: none` removes all borders, which can also be used to underline text.  `a {color: #1565C0}` sets links to be a dark blue.
@@ -4436,9 +5262,14 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             }
                         };
 
-                        // Displaying of `mainWebView` after 500 milliseconds.
+                        // Display the WebView after 500 milliseconds.
                         displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
                     });
+                } else {  // Night mode is disabled.
+                    // Display the nested scroll WebView if night mode is disabled.
+                    // Because of a race condition between `applyDomainSettings` and `onPageStarted`,
+                    // when night mode is set by domain settings the WebView may be hidden even if night mode is not currently enabled.
+                    nestedScrollWebView.setVisibility(View.VISIBLE);
                 }
 
                 // Update the progress bar.
@@ -4452,13 +5283,6 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Hide the progress bar.
                     progressBar.setVisibility(View.GONE);
 
-                    // Display the nested scroll WebView if night mode is disabled.
-                    // Because of a race condition between `applyDomainSettings` and `onPageStarted`,
-                    // when night mode is set by domain settings the WebView may be hidden even if night mode is not currently enabled.
-                    if (!nestedScrollWebView.getNightMode()) {
-                        nestedScrollWebView.setVisibility(View.VISIBLE);
-                    }
-
                     //Stop the swipe to refresh indicator if it is running
                     swipeRefreshLayout.setRefreshing(false);
                 }
@@ -4515,8 +5339,14 @@ 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);
+                    }
                 }
             }
 
@@ -4564,6 +5394,9 @@ 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.
@@ -4572,6 +5405,9 @@ 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;
 
@@ -4591,6 +5427,10 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
                     // Hide the app bar if specified.
                     if (hideAppBar) {
+                        // Hide the tab linear layout.
+                        tabsLinearLayout.setVisibility(View.GONE);
+
+                        // Hide the action bar.
                         actionBar.hide();
                     }
 
@@ -4636,8 +5476,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Create an intent to open a chooser based ont the file chooser parameters.
                     Intent fileChooserIntent = fileChooserParams.createIntent();
 
-                    // Open the file chooser.  Currently only one `startActivityForResult` exists in this activity, so the request code, used to differentiate them, is simply `0`.
-                    startActivityForResult(fileChooserIntent, 0);
+                    // Open the file chooser.
+                    startActivityForResult(fileChooserIntent, FILE_UPLOAD_REQUEST_CODE);
                 }
                 return true;
             }
@@ -4648,6 +5488,9 @@ 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);
@@ -4721,6 +5564,28 @@ 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);
 
@@ -4728,16 +5593,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 Menu navigationMenu = navigationView.getMenu();
 
                 // Get a handle for the navigation requests menu item.  The menu is 0 based.
-                MenuItem navigationRequestsMenuItem = navigationMenu.getItem(6);
-
-                // Get handles for the options menu items.
-                MenuItem blocklistsMenuItem = optionsMenu.findItem(R.id.blocklists);
-                MenuItem easyListMenuItem = optionsMenu.findItem(R.id.easylist);
-                MenuItem easyPrivacyMenuItem = optionsMenu.findItem(R.id.easyprivacy);
-                MenuItem fanboysAnnoyanceListMenuItem = optionsMenu.findItem(R.id.fanboys_annoyance_list);
-                MenuItem fanboysSocialBlockingListMenuItem = optionsMenu.findItem(R.id.fanboys_social_blocking_list);
-                MenuItem ultraPrivacyMenuItem = optionsMenu.findItem(R.id.ultraprivacy);
-                MenuItem blockAllThirdPartyRequestsMenuItem = optionsMenu.findItem(R.id.block_all_third_party_requests);
+                MenuItem navigationRequestsMenuItem = navigationMenu.getItem(5);
 
                 // Create an empty web resource response to be used if the resource request is blocked.
                 WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
@@ -4790,7 +5646,7 @@ 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);
@@ -4802,9 +5658,13 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                         activity.runOnUiThread(() -> {
                             // Update the menu item titles.
                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                            blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                            blockAllThirdPartyRequestsMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " +
-                                    getString(R.string.block_all_third_party_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.block_all_third_party_requests).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " +
+                                        getString(R.string.block_all_third_party_requests));
+                            }
                         });
                     }
 
@@ -4812,20 +5672,60 @@ 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) {
@@ -4833,14 +5733,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             activity.runOnUiThread(() -> {
                                 // Update the menu item titles.
                                 navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                ultraPrivacyMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.ULTRA_PRIVACY) + " - " + getString(R.string.ultraprivacy));
+
+                                // 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.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]});
@@ -4851,18 +5755,18 @@ 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) {
@@ -4870,33 +5774,37 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             activity.runOnUiThread(() -> {
                                 // Update the menu item titles.
                                 navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                easyListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_LIST) + " - " + getString(R.string.easylist));
+
+                                // 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.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) {
@@ -4904,14 +5812,18 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             activity.runOnUiThread(() -> {
                                 // Update the menu item titles.
                                 navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                easyPrivacyMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.EASY_PRIVACY) + " - " + getString(R.string.easyprivacy));
+
+                                // 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.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]};
                     }
@@ -4920,10 +5832,10 @@ 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]});
@@ -4938,25 +5850,29 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             activity.runOnUiThread(() -> {
                                 // Update the menu item titles.
                                 navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                fanboysAnnoyanceListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " +
-                                        getString(R.string.fanboys_annoyance_list));
+
+                                // 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.fanboys_annoyance_list).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " +
+                                            getString(R.string.fanboys_annoyance_list));
+                                }
                             });
                         }
 
                         // 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]});
@@ -4971,15 +5887,19 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                             activity.runOnUiThread(() -> {
                                 // Update the menu item titles.
                                 navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + nestedScrollWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
-                                fanboysSocialBlockingListMenuItem.setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " +
-                                        getString(R.string.fanboys_social_blocking_list));
+
+                                // 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.fanboys_social_blocking_list).setTitle(nestedScrollWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " +
+                                            getString(R.string.fanboys_social_blocking_list));
+                                }
                             });
                         }
 
                         // 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]};
@@ -4990,7 +5910,7 @@ 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.
@@ -5012,9 +5932,31 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
             @Override
             public void onPageStarted(WebView view, String url, Bitmap favicon) {
-                // Get the theme preference.
+                // Get the preferences.
+                boolean scrollAppBar = sharedPreferences.getBoolean("scroll_app_bar", true);
                 boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 
+                // Get a handler for the app bar layout.
+                AppBarLayout appBarLayout = findViewById(R.id.appbar_layout);
+
+                // Set the top padding of the swipe refresh layout according to the app bar scrolling preference.
+                if (scrollAppBar) {
+                    // No padding is needed because it will automatically be placed below the app bar layout due to the scrolling layout behavior.
+                    swipeRefreshLayout.setPadding(0, 0, 0, 0);
+
+                    // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                    swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10, defaultProgressViewEndOffset);
+                } else {
+                    // Get the app bar layout height.  This can't be done in `applyAppSettings()` because the app bar is not yet populated.
+                    int appBarHeight = appBarLayout.getHeight();
+
+                    // The swipe refresh layout must be manually moved below the app bar layout.
+                    swipeRefreshLayout.setPadding(0, appBarHeight, 0, 0);
+
+                    // The swipe to refresh circle doesn't always hide itself completely unless it is moved up 10 pixels.
+                    swipeRefreshLayout.setProgressViewOffset(false, defaultProgressViewStartOffset - 10 + appBarHeight, defaultProgressViewEndOffset + appBarHeight);
+                }
+
                 // Reset the list of resource requests.
                 nestedScrollWebView.clearResourceRequests();
 
@@ -5024,6 +5966,8 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                 // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
                 if (nestedScrollWebView.getNightMode()) {
                     nestedScrollWebView.setVisibility(View.INVISIBLE);
+                } else {
+                    nestedScrollWebView.setVisibility(View.VISIBLE);
                 }
 
                 // Hide the keyboard.
@@ -5031,11 +5975,20 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Check to see if Privacy Browser is waiting on Orbot.
                 if (!waitingForOrbot) {  // Process the URL.
-                    // Display the formatted URL text.
-                    urlEditText.setText(url);
+                    // Get the current page position.
+                    int currentPagePosition = webViewPagerAdapter.getPositionForId(nestedScrollWebView.getWebViewFragmentId());
 
-                    // Apply text highlighting to `urlTextBox`.
-                    highlightUrlText();
+                    // 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();
+                    }
 
                     // Reset the list of host IP addresses.
                     nestedScrollWebView.clearCurrentIpAddresses();
@@ -5046,21 +5999,7 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     // Get the IP addresses for the host.
                     new GetHostIpAddresses(activity, getSupportFragmentManager(), nestedScrollWebView).execute(currentUri.getHost());
 
-                    // Apply any custom domain settings if the URL was loaded by navigating history.
-                    if (nestedScrollWebView.getNavigatingHistory()) {
-                        // Reset navigating history.
-                        nestedScrollWebView.setNavigatingHistory(false);
-
-                        // Apply the domain settings.
-                        boolean userAgentChanged = applyDomainSettings(nestedScrollWebView, url, true, false);
-
-                        // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
-                        if (userAgentChanged) {
-                            loadUrl(url);
-                        }
-                    }
-
-                    // Replace Refresh with Stop if the options menu has been created.  (The WebView typically begins loading before the menu items are instantiated.)
+                    // Replace Refresh with Stop if the options menu has been created.  (The first WebView typically begins loading before the menu items are instantiated.)
                     if (optionsMenu != null) {
                         // Get a handle for the refresh menu item.
                         MenuItem refreshMenuItem = optionsMenu.findItem(R.id.refresh);
@@ -5085,12 +6024,6 @@ 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();
@@ -5145,38 +6078,82 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
 
                 // Update the URL text box and apply domain settings if not waiting on Orbot.
                 if (!waitingForOrbot) {
-                    // Check to see if `WebView` has set `url` to be `about:blank`.
-                    if (url.equals("about:blank")) {  // The WebView is blank.
-                        // Display the hint in the URL edit text.
-                        urlEditText.setText("");
-
-                        // Request focus for `urlTextBox`.
-                        urlEditText.requestFocus();
-
-                        // Display the keyboard.
-                        inputMethodManager.showSoftInput(urlEditText, 0);
-
-                        // Hide the WebView, which causes the default background color to be displayed according to the theme.
-                        nestedScrollWebView.setVisibility(View.GONE);
-
-                        // Apply the domain settings.  This clears any settings from the previous domain.
-                        applyDomainSettings(nestedScrollWebView, "", true, false);
-                    } else {  // The WebView has loaded a webpage.
-                        // Only update the URL text box if the user is not typing in it.
-                        if (!urlEditText.hasFocus()) {
-                            // Display the final URL.  Getting the URL from the WebView instead of using the one provided by `onPageFinished` makes websites like YouTube function correctly.
-                            urlEditText.setText(nestedScrollWebView.getUrl());
-
-                            // Apply text highlighting to `urlTextBox`.
-                            highlightUrlText();
-                        }
-                    }
+                    // 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);
                     }
+
+                    // 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);
+
+                            // Apply the domain settings.  This clears any settings from the previous domain.
+                            applyDomainSettings(nestedScrollWebView, "", true, false);
+
+                            // Only populate the title text view if the tab has been fully created.
+                            if (tab != null) {
+                                // Get the custom view from the tab.
+                                View tabView = tab.getCustomView();
+
+                                // Remove the incorrect warning below that the current tab view might be null.
+                                assert tabView != null;
+
+                                // Get the title text view from the tab.
+                                TextView tabTitleTextView = tabView.findViewById(R.id.title_textview);
+
+                                // Set the title as the tab text.
+                                tabTitleTextView.setText(R.string.new_tab);
+                            }
+                        } else {  // The WebView has loaded a webpage.
+                            // 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);
+
+                                // Display the final URL.  Getting the URL from the WebView instead of using the one provided by `onPageFinished()` makes websites like YouTube function correctly.
+                                urlEditText.setText(sanitizedUrl);
+
+                                // Apply text highlighting to the URL.
+                                highlightUrlText();
+                            }
+
+                            // Only populate the title text view if the tab has been fully created.
+                            if (tab != null) {
+                                // Get the custom view from the tab.
+                                View tabView = tab.getCustomView();
+
+                                // Remove the incorrect warning below that the current tab view might be null.
+                                assert tabView != null;
+
+                                // 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());
+                            }
+                        }
+                    }
                 }
             }
 
@@ -5272,6 +6249,30 @@ public class MainWebViewActivity extends AppCompatActivity implements CreateBook
                     }
                 }
             }
+        } else {  // This is not the first tab.
+            // Apply the domain settings.
+            applyDomainSettings(nestedScrollWebView, url, false, false);
+
+            // Load the URL.
+            nestedScrollWebView.loadUrl(url, customHeaders);
+
+            // Set the focus and display the keyboard if the URL is blank.
+            if (url.equals("")) {
+                // Request focus for the URL text box.
+                urlEditText.requestFocus();
+
+                // Create a display keyboard handler.
+                Handler displayKeyboardHandler = new Handler();
+
+                // Create a display keyboard runnable.
+                Runnable displayKeyboardRunnable = () -> {
+                    // Display the keyboard.
+                    inputMethodManager.showSoftInput(urlEditText, 0);
+                };
+
+                // Display the keyboard after 100 milliseconds, which leaves enough time for the tab to transition.
+                displayKeyboardHandler.postDelayed(displayKeyboardRunnable, 100);
+            }
         }
     }
 }
\ No newline at end of file