]> gitweb.stoutner.com Git - PrivacyBrowserAndroid.git/blobdiff - app/src/main/java/com/stoutner/privacybrowser/fragments/SettingsFragment.java
Switch to using AndroidX's ProxyController. https://redmine.stoutner.com/issues/486
[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / fragments / SettingsFragment.java
index cff09bee795f40df1d15e4e9734c7d3e654351cd..16ca2998ca88e379359534641808ae4f40bf4e3d 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2016-2018 Soren Stoutner <soren@stoutner.com>.
+ * Copyright © 2016-2019 Soren Stoutner <soren@stoutner.com>.
  *
  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
  *
 package com.stoutner.privacybrowser.fragments;
 
 import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Build;
 import android.os.Bundle;
-import android.preference.Preference;
-import android.preference.PreferenceFragment;
+import android.os.Handler;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.webkit.WebView;
+import android.widget.ArrayAdapter;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceFragmentCompat;
 
 import com.stoutner.privacybrowser.R;
 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
+import com.stoutner.privacybrowser.helpers.ProxyHelper;
 
-public class SettingsFragment extends PreferenceFragment {
+public class SettingsFragment extends PreferenceFragmentCompat {
+    // Define the class variables.
     private SharedPreferences.OnSharedPreferenceChangeListener preferencesListener;
     private SharedPreferences savedPreferences;
 
     @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        addPreferencesFromResource(R.xml.preferences);
+    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+        // Load the preferences from the XML file.
+        setPreferencesFromResource(R.xml.preferences, rootKey);
+
+        // Get a handle for the activity.
+        Activity activity = getActivity();
+
+        // Remove the lint warning below that `getApplicationContext()` might produce a null pointer exception.
+        assert activity != null;
+
+        // Get a handle for the context.
+        Context context = activity.getApplicationContext();
 
         // Initialize savedPreferences.
         savedPreferences = getPreferenceScreen().getSharedPreferences();
 
-        // Get handles for the preferences we need to modify.
-        final Preference javaScriptPreference = findPreference("javascript_enabled");
-        final Preference firstPartyCookiesPreference = findPreference("first_party_cookies_enabled");
-        final Preference thirdPartyCookiesPreference = findPreference("third_party_cookies_enabled");
-        final Preference domStoragePreference = findPreference("dom_storage_enabled");
-        final Preference saveFormDataPreference = findPreference("save_form_data_enabled");
-        final Preference userAgentPreference = findPreference("user_agent");
-        final Preference customUserAgentPreference = findPreference("custom_user_agent");
-        final Preference incognitoModePreference = findPreference("incognito_mode");
-        final Preference doNotTrackPreference = findPreference("do_not_track");
-        final Preference easyListPreference = findPreference("easylist");
-        final Preference easyPrivacyPreference = findPreference("easyprivacy");
-        final Preference fanboyAnnoyanceListPreference = findPreference("fanboy_annoyance_list");
-        final Preference fanboySocialBlockingListPreference = findPreference("fanboy_social_blocking_list");
-        final Preference proxyThroughOrbotPreference = findPreference("proxy_through_orbot");
-        final Preference torHomepagePreference = findPreference("tor_homepage");
-        final Preference torSearchPreference = findPreference("tor_search");
-        final Preference torSearchCustomURLPreference = findPreference("tor_search_custom_url");
-        final Preference searchPreference = findPreference("search");
-        final Preference searchCustomURLPreference = findPreference("search_custom_url");
-        final Preference fullScreenBrowsingModePreference = findPreference("full_screen_browsing_mode");
-        final Preference hideSystemBarsPreference = findPreference("hide_system_bars");
-        final Preference translucentNavigationBarPreference = findPreference("translucent_navigation_bar");
-        final Preference clearEverythingPreference = findPreference("clear_everything");
-        final Preference clearCookiesPreference = findPreference("clear_cookies");
-        final Preference clearDomStoragePreference = findPreference("clear_dom_storage");
-        final Preference clearFormDataPreference = findPreference("clear_form_data");
-        final Preference clearCachePreference = findPreference("clear_cache");
-        final Preference homepagePreference = findPreference("homepage");
-        final Preference defaultFontSizePreference = findPreference("default_font_size");
-        final Preference swipeToRefreshPreference = findPreference("swipe_to_refresh");
-        final Preference displayAdditionalAppBarIconsPreference = findPreference("display_additional_app_bar_icons");
-        final Preference darkThemePreference = findPreference("dark_theme");
-        final Preference nightModePreference = findPreference("night_mode");
-        final Preference displayWebpageImagesPreference = findPreference("display_webpage_images");
-
-        // Set dependencies.
-        torHomepagePreference.setDependency("proxy_through_orbot");
-        torSearchPreference.setDependency("proxy_through_orbot");
-        hideSystemBarsPreference.setDependency("full_screen_browsing_mode");
-
-        // Get Strings from the preferences.
-        String torSearchString = savedPreferences.getString("tor_search", "https://3g2upl4pq6kufc4m.onion/html/?q=");
-        String searchString = savedPreferences.getString("search", "https://duckduckgo.com/html/?q=");
-
-        // Get booleans from the preferences.
-        final boolean javaScriptEnabled = savedPreferences.getBoolean("javascript_enabled", false);
-        boolean firstPartyCookiesEnabled = savedPreferences.getBoolean("first_party_cookies_enabled", false);
-        boolean thirdPartyCookiesEnabled = savedPreferences.getBoolean("third_party_cookies_enabled", false);
-        boolean fanboyAnnoyanceListEnabled = savedPreferences.getBoolean("fanboy_annoyance_list", true);
-        boolean fanboySocialBlockingEnabled = savedPreferences.getBoolean("fanboy_social_blocking_list", true);
-        boolean proxyThroughOrbot = savedPreferences.getBoolean("proxy_through_orbot", false);
+        // Get handles for the preferences.
+        Preference javaScriptPreference = findPreference("javascript");
+        Preference firstPartyCookiesPreference = findPreference("first_party_cookies");
+        Preference thirdPartyCookiesPreference = findPreference("third_party_cookies");
+        Preference domStoragePreference = findPreference("dom_storage");
+        Preference formDataPreference = findPreference("save_form_data");  // The form data preference can be removed once the minimum API >= 26.
+        Preference userAgentPreference = findPreference("user_agent");
+        Preference customUserAgentPreference = findPreference("custom_user_agent");
+        Preference incognitoModePreference = findPreference("incognito_mode");
+        Preference doNotTrackPreference = findPreference("do_not_track");
+        Preference allowScreenshotsPreference = findPreference("allow_screenshots");
+        Preference easyListPreference = findPreference("easylist");
+        Preference easyPrivacyPreference = findPreference("easyprivacy");
+        Preference fanboyAnnoyanceListPreference = findPreference("fanboys_annoyance_list");
+        Preference fanboySocialBlockingListPreference = findPreference("fanboys_social_blocking_list");
+        Preference ultraListPreference = findPreference("ultralist");
+        Preference ultraPrivacyPreference = findPreference("ultraprivacy");
+        Preference blockAllThirdPartyRequestsPreference = findPreference("block_all_third_party_requests");
+        Preference googleAnalyticsPreference = findPreference("google_analytics");
+        Preference facebookClickIdsPreference = findPreference("facebook_click_ids");
+        Preference twitterAmpRedirectsPreference = findPreference("twitter_amp_redirects");
+        Preference searchPreference = findPreference("search");
+        Preference searchCustomURLPreference = findPreference("search_custom_url");
+        Preference proxyPreference = findPreference("proxy");
+        Preference proxyCustomUrlPreference = findPreference("proxy_custom_url");
+        Preference fullScreenBrowsingModePreference = findPreference("full_screen_browsing_mode");
+        Preference hideAppBarPreference = findPreference("hide_app_bar");
+        Preference clearEverythingPreference = findPreference("clear_everything");
+        Preference clearCookiesPreference = findPreference("clear_cookies");
+        Preference clearDomStoragePreference = findPreference("clear_dom_storage");
+        Preference clearFormDataPreference = findPreference("clear_form_data");  // The clear form data preference can be removed once the minimum API >= 26.
+        Preference clearCachePreference = findPreference("clear_cache");
+        Preference homepagePreference = findPreference("homepage");
+        Preference fontSizePreference = findPreference("font_size");
+        Preference openIntentsInNewTabPreference = findPreference("open_intents_in_new_tab");
+        Preference swipeToRefreshPreference = findPreference("swipe_to_refresh");
+        Preference scrollAppBarPreference = findPreference("scroll_app_bar");
+        Preference displayAdditionalAppBarIconsPreference = findPreference("display_additional_app_bar_icons");
+        Preference downloadWithExternalAppPreference = findPreference("download_with_external_app");
+        Preference darkThemePreference = findPreference("dark_theme");
+        Preference nightModePreference = findPreference("night_mode");
+        Preference wideViewportPreference = findPreference("wide_viewport");
+        Preference displayWebpageImagesPreference = findPreference("display_webpage_images");
+
+        // Remove the lint warnings below that the preferences might be null.
+        assert javaScriptPreference != null;
+        assert firstPartyCookiesPreference != null;
+        assert thirdPartyCookiesPreference != null;
+        assert domStoragePreference != null;
+        assert formDataPreference != null;
+        assert userAgentPreference != null;
+        assert customUserAgentPreference != null;
+        assert incognitoModePreference != null;
+        assert doNotTrackPreference != null;
+        assert allowScreenshotsPreference != null;
+        assert easyListPreference != null;
+        assert easyPrivacyPreference != null;
+        assert fanboyAnnoyanceListPreference != null;
+        assert fanboySocialBlockingListPreference != null;
+        assert ultraListPreference != null;
+        assert ultraPrivacyPreference != null;
+        assert blockAllThirdPartyRequestsPreference != null;
+        assert googleAnalyticsPreference != null;
+        assert facebookClickIdsPreference != null;
+        assert twitterAmpRedirectsPreference != null;
+        assert searchPreference != null;
+        assert searchCustomURLPreference != null;
+        assert proxyPreference != null;
+        assert proxyCustomUrlPreference != null;
+        assert fullScreenBrowsingModePreference != null;
+        assert hideAppBarPreference != null;
+        assert clearEverythingPreference != null;
+        assert clearCookiesPreference != null;
+        assert clearDomStoragePreference != null;
+        assert clearFormDataPreference != null;
+        assert clearCachePreference != null;
+        assert homepagePreference != null;
+        assert fontSizePreference != null;
+        assert openIntentsInNewTabPreference != null;
+        assert swipeToRefreshPreference != null;
+        assert scrollAppBarPreference != null;
+        assert displayAdditionalAppBarIconsPreference != null;
+        assert downloadWithExternalAppPreference != null;
+        assert darkThemePreference != null;
+        assert nightModePreference != null;
+        assert wideViewportPreference != null;
+        assert displayWebpageImagesPreference != null;
+
+        // Set the hide app bar preference dependency.
+        hideAppBarPreference.setDependency("full_screen_browsing_mode");
+
+        // Get strings from the preferences.
+        String searchString = savedPreferences.getString("search", getString(R.string.search_default_value));
+        String proxyString = savedPreferences.getString("proxy", getString(R.string.proxy_default_value));
+
+        // Get booleans that are used in multiple places from the preferences.
+        boolean javaScriptEnabled = savedPreferences.getBoolean("javascript", false);
+        boolean firstPartyCookiesEnabled = savedPreferences.getBoolean("first_party_cookies", false);
+        boolean thirdPartyCookiesEnabled = savedPreferences.getBoolean("third_party_cookies", false);
+        boolean fanboyAnnoyanceListEnabled = savedPreferences.getBoolean("fanboys_annoyance_list", true);
+        boolean fanboySocialBlockingEnabled = savedPreferences.getBoolean("fanboys_social_blocking_list", true);
         boolean fullScreenBrowsingMode = savedPreferences.getBoolean("full_screen_browsing_mode", false);
-        boolean hideSystemBars = savedPreferences.getBoolean("hide_system_bars", false);
         boolean clearEverything = savedPreferences.getBoolean("clear_everything", true);
-        final boolean nightMode = savedPreferences.getBoolean("night_mode", false);
+        boolean darkTheme = savedPreferences.getBoolean("dark_theme", false);
+        boolean nightMode = savedPreferences.getBoolean("night_mode", false);
 
-        // Only enable the third-party preference if first-party cookies are enabled and API >= 21.
+        // Only enable the third-party cookies preference if first-party cookies are enabled and API >= 21.
         thirdPartyCookiesPreference.setEnabled(firstPartyCookiesEnabled && (Build.VERSION.SDK_INT >= 21));
 
         // Only enable the DOM storage preference if either JavaScript or Night Mode is enabled.
         domStoragePreference.setEnabled(javaScriptEnabled || nightMode);
 
+        // Remove the form data preferences if the API is >= 26 as they no longer do anything.
+        if (Build.VERSION.SDK_INT >= 26) {
+            // Get the categories.
+            PreferenceCategory privacyCategory = findPreference("privacy");
+            PreferenceCategory clearAndExitCategory = findPreference("clear_and_exit");
+
+            // Remove the lint warnings below that the preference categories might be null.
+            assert privacyCategory != null;
+            assert clearAndExitCategory != null;
+
+            // Remove the form data preferences.
+            privacyCategory.removePreference(formDataPreference);
+            clearAndExitCategory.removePreference(clearFormDataPreference);
+        }
+
         // Only enable Fanboy's social blocking list preference if Fanboy's annoyance list is disabled.
         fanboySocialBlockingListPreference.setEnabled(!fanboyAnnoyanceListEnabled);
 
-        // We need to inflated a `WebView` to get the default user agent.
+        // Inflate a WebView to get the default user agent.
         LayoutInflater inflater = getActivity().getLayoutInflater();
-        // `@SuppressLint("InflateParams")` removes the warning about using `null` as the `ViewGroup`, which in this case makes sense because we don't want to display `bare_webview` on the screen.
+        // `@SuppressLint("InflateParams")` removes the warning about using `null` as the `ViewGroup`, which in this case makes sense because the `bare_webview` will not be displayed.
         @SuppressLint("InflateParams") View bareWebViewLayout = inflater.inflate(R.layout.bare_webview, null, false);
-        final WebView bareWebView = bareWebViewLayout.findViewById(R.id.bare_webview);
+        WebView bareWebView = bareWebViewLayout.findViewById(R.id.bare_webview);
+
+        // Get the user agent arrays.
+        ArrayAdapter<CharSequence> userAgentNamesArray = ArrayAdapter.createFromResource(context, R.array.user_agent_names, R.layout.spinner_item);
+        String[] translatedUserAgentNamesArray = getResources().getStringArray(R.array.translated_user_agent_names);
+        String[] userAgentDataArray = getResources().getStringArray(R.array.user_agent_data);
 
-        // Set the current user-agent as the summary text for the "user_agent" preference when the preference screen is loaded.
-        switch (savedPreferences.getString("user_agent", "PrivacyBrowser/1.0")) {
-            case "WebView default user agent":
+        // Get the current user agent name from the preference.
+        String userAgentName = savedPreferences.getString("user_agent", getString(R.string.user_agent_default_value));
+
+        // Get the array position of the user agent name.
+        int userAgentArrayPosition = userAgentNamesArray.getPosition(userAgentName);
+
+        // Populate the user agent summary.
+        switch (userAgentArrayPosition) {
+            case MainWebViewActivity.UNRECOGNIZED_USER_AGENT:  // The 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.  Use the current user agent entry name as the summary.
+                userAgentPreference.setSummary(userAgentName);
+                break;
+
+            case MainWebViewActivity.SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
                 // Get the user agent text from the webview (which changes based on the version of Android and WebView installed).
-                userAgentPreference.setSummary(bareWebView.getSettings().getUserAgentString());
+                userAgentPreference.setSummary(translatedUserAgentNamesArray[userAgentArrayPosition] + ":\n" + bareWebView.getSettings().getUserAgentString());
                 break;
 
-            case "Custom user agent":
-                // We can't use the string from the array because it is referenced in code and can't be translated.
+            case MainWebViewActivity.SETTINGS_CUSTOM_USER_AGENT:
+                // Set the summary text.
                 userAgentPreference.setSummary(R.string.custom_user_agent);
                 break;
 
             default:
-                // Display the user agent from the preference as the summary text.
-                userAgentPreference.setSummary(savedPreferences.getString("user_agent", "PrivacyBrowser/1.0"));
-                break;
-        }
-
-        // Set the summary text for "customUserAgentPreference" (the default is `PrivacyBrowser/1.0`) and enable it if `userAgentPreference` it set to `Custom user agent`.
-        customUserAgentPreference.setSummary(savedPreferences.getString("custom_user_agent", "PrivacyBrowser/1.0"));
-        customUserAgentPreference.setEnabled(userAgentPreference.getSummary().equals("Custom user agent"));
-
-
-        // Set the Tor homepage URL as the summary text for the `tor_homepage` preference when the preference screen is loaded.  The default is DuckDuckGo: `https://3g2upl4pq6kufc4m.onion`.
-        torHomepagePreference.setSummary(savedPreferences.getString("tor_homepage", "https://3g2upl4pq6kufc4m.onion"));
-
-
-        // Set the Tor search URL as the summary text for the Tor preference when the preference screen is loaded.  The default is `https://3g2upl4pq6kufc4m.onion/html/?q=`
-        if (torSearchString.equals("Custom URL")) {
-            // Use R.string.custom_url, which will be translated, instead of the array value, which will not.
-            torSearchPreference.setSummary(R.string.custom_url);
-        } else {
-            // Set the array value as the summary text.
-            torSearchPreference.setSummary(torSearchString);
+                // Get the user agent summary from the user agent data array.
+                userAgentPreference.setSummary(translatedUserAgentNamesArray[userAgentArrayPosition] + ":\n" + userAgentDataArray[userAgentArrayPosition]);
         }
 
-        // Set the summary text for `tor_search_custom_url`.  The default is `""`.
-        torSearchCustomURLPreference.setSummary(savedPreferences.getString("tor_search_custom_url", ""));
+        // Set the summary text for the custom user agent preference and enable it if user agent preference is set to custom.
+        customUserAgentPreference.setSummary(savedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
+        customUserAgentPreference.setEnabled(userAgentPreference.getSummary().equals(getString(R.string.custom_user_agent)));
 
-        // Enable the Tor custom URL search options only if proxying through Orbot and the search is set to `Custom URL`.
-        torSearchCustomURLPreference.setEnabled(proxyThroughOrbot && torSearchString.equals("Custom URL"));
-
-
-        // Set the search URL as the summary text for the search preference when the preference screen is loaded.  The default is `https://duckduckgo.com/html/?q=`.
+        // Set the search URL as the summary text for the search preference when the preference screen is loaded.
         if (searchString.equals("Custom URL")) {
             // Use R.string.custom_url, which will be translated, instead of the array value, which will not.
             searchPreference.setSummary(R.string.custom_url);
@@ -170,149 +245,191 @@ public class SettingsFragment extends PreferenceFragment {
         }
 
         // Set the summary text for `search_custom_url` (the default is `""`) and enable it if `search` is set to `Custom URL`.
-        searchCustomURLPreference.setSummary(savedPreferences.getString("search_custom_url", ""));
+        searchCustomURLPreference.setSummary(savedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value)));
         searchCustomURLPreference.setEnabled(searchString.equals("Custom URL"));
 
+        // Set the summary text for the proxy preference when the preference screen is loaded.
+        switch (proxyString) {
+            case ProxyHelper.NONE:
+                proxyPreference.setSummary(getString(R.string.no_proxy_enabled));
+                break;
+
+            case ProxyHelper.TOR:
+                if (Build.VERSION.SDK_INT == 19) {  // Proxying through SOCKS doesn't work on Android KitKat.
+                    proxyPreference.setSummary(getString(R.string.tor_enabled_kitkat));
+                } else {
+                    proxyPreference.setSummary(getString(R.string.tor_enabled));
+                }
+                break;
+
+            case ProxyHelper.I2P:
+                proxyPreference.setSummary(getString(R.string.i2p_enabled));
+                break;
+
+            case ProxyHelper.CUSTOM:
+                proxyPreference.setSummary(getString(R.string.custom_proxy));
+                break;
+        }
+
+        // Only enable the custom proxy URL if a custom proxy is selected.
+        proxyCustomUrlPreference.setEnabled(proxyString.equals("Custom"));
 
-        // Enable `translucentNavigationBarPreference` only if full screen browsing mode is enabled and `hide_system_bars` is disabled.
-        translucentNavigationBarPreference.setEnabled(fullScreenBrowsingMode && !hideSystemBars);
+        // Set the summary text for the custom proxy URL.
+        proxyCustomUrlPreference.setSummary(savedPreferences.getString("proxy_custom_url", getString(R.string.proxy_custom_url_default_value)));
 
-        // Set the status of the `Clear and Exit` preferences.
+        // Set the status of the Clear and Exit preferences.
         clearCookiesPreference.setEnabled(!clearEverything);
         clearDomStoragePreference.setEnabled(!clearEverything);
-        clearFormDataPreference.setEnabled(!clearEverything);
+        clearFormDataPreference.setEnabled(!clearEverything);  // The form data line can be removed once the minimum API is >= 26.
         clearCachePreference.setEnabled(!clearEverything);
 
-        // Set the homepage URL as the summary text for the `Homepage` preference when the preference screen is loaded.  The default is `https://duckduckgo.com`.
-        homepagePreference.setSummary(savedPreferences.getString("homepage", "https://duckduckgo.com"));
+        // Set the homepage URL as the summary text for the homepage preference.
+        homepagePreference.setSummary(savedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
 
-        // Set the default font size as the summary text for the `Default Font Size` preference when the preference screen is loaded.  The default is `100`.
-        defaultFontSizePreference.setSummary(savedPreferences.getString("default_font_size", "100") + "%%");
+        // Set the font size as the summary text for the preference.
+        fontSizePreference.setSummary(savedPreferences.getString("font_size", getString(R.string.font_size_default_value)) + "%");
 
-        // Disable `javaScriptPreference` if `nightModeBoolean` is true.  JavaScript will be enabled for all web pages.
+        // Disable the JavaScript preference if Night Mode is enabled.  JavaScript will be enabled for all web pages.
         javaScriptPreference.setEnabled(!nightMode);
 
-        // Set the `javaScriptPreference` icon.
+        // Set the JavaScript icon.
         if (javaScriptEnabled || nightMode) {
             javaScriptPreference.setIcon(R.drawable.javascript_enabled);
         } else {
             javaScriptPreference.setIcon(R.drawable.privacy_mode);
         }
 
-        // Set the `firstPartyCookiesPreference` icon.
+        // Set the first-party cookies icon.
         if (firstPartyCookiesEnabled) {
             firstPartyCookiesPreference.setIcon(R.drawable.cookies_enabled);
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 firstPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
             } else {
                 firstPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
             }
         }
 
-        // Set the `thirdPartyCookiesPreference` icon.
+        // Set the third party cookies icon.
         if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
             if (thirdPartyCookiesEnabled) {
                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_warning);
             } else {
-                if (MainWebViewActivity.darkTheme) {
+                if (darkTheme) {
                     thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
                 } else {
                     thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
                 }
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_dark);
             } else {
                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_light);
             }
         }
 
-        // Set the `domStoragePreference` icon.
+        // Set the DOM storage icon.
         if (javaScriptEnabled || nightMode) {  // The preference is enabled.
-            if (savedPreferences.getBoolean("dom_storage_enabled", false)) {  // DOM storage is enabled.
+            if (savedPreferences.getBoolean("dom_storage", false)) {  // DOM storage is enabled.
                 domStoragePreference.setIcon(R.drawable.dom_storage_enabled);
             } else {  // DOM storage is disabled.
-                if (MainWebViewActivity.darkTheme) {
+                if (darkTheme) {
                     domStoragePreference.setIcon(R.drawable.dom_storage_disabled_dark);
                 } else {
                     domStoragePreference.setIcon(R.drawable.dom_storage_disabled_light);
                 }
             }
         } else {  // The preference is disabled.  The icon should be ghosted.
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_dark);
             } else {
                 domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_light);
             }
         }
 
-        // Set the `saveFormDataPreference` icon.
-        if (savedPreferences.getBoolean("save_form_data_enabled", false)) {
-            saveFormDataPreference.setIcon(R.drawable.form_data_enabled);
-        } else {
-            if (MainWebViewActivity.darkTheme) {
-                saveFormDataPreference.setIcon(R.drawable.form_data_disabled_dark);
+        // Set the save form data icon if API < 26.  Save form data has no effect on API >= 26.
+        if (Build.VERSION.SDK_INT < 26) {
+            if (savedPreferences.getBoolean("save_form_data", false)) {
+                formDataPreference.setIcon(R.drawable.form_data_enabled);
             } else {
-                saveFormDataPreference.setIcon(R.drawable.form_data_disabled_light);
+                if (darkTheme) {
+                    formDataPreference.setIcon(R.drawable.form_data_disabled_dark);
+                } else {
+                    formDataPreference.setIcon(R.drawable.form_data_disabled_light);
+                }
             }
         }
 
-        // Set the `customUserAgentPreference` icon.
+        // Set the custom user agent icon.
         if (customUserAgentPreference.isEnabled()) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_enabled_dark);
             } else {
                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_dark);
             } else {
                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_light);
             }
         }
 
-        // Set the `incognitoModePreference` icon.
+        // Set the incognito mode icon.
         if (savedPreferences.getBoolean("incognito_mode", false)) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 incognitoModePreference.setIcon(R.drawable.incognito_mode_enabled_dark);
             } else {
                 incognitoModePreference.setIcon(R.drawable.incognito_mode_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 incognitoModePreference.setIcon(R.drawable.incognito_mode_disabled_dark);
             } else {
                 incognitoModePreference.setIcon(R.drawable.incognito_mode_disabled_light);
             }
         }
 
-        // Set the `doNotTrackPreference` icon.
+        // Set the Do Not Track icon.
         if (savedPreferences.getBoolean("do_not_track", false)) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 doNotTrackPreference.setIcon(R.drawable.block_tracking_enabled_dark);
             } else {
                 doNotTrackPreference.setIcon(R.drawable.block_tracking_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 doNotTrackPreference.setIcon(R.drawable.block_tracking_disabled_dark);
             } else {
                 doNotTrackPreference.setIcon(R.drawable.block_tracking_disabled_light);
             }
         }
 
+        // Set the allow screenshots icon.
+        if (savedPreferences.getBoolean("allow_screenshots", false)) {
+            if (darkTheme) {
+                allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_enabled_dark);
+            } else {
+                allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_disabled_dark);
+            } else {
+                allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_disabled_light);
+            }
+        }
+
         // Set the EasyList icon.
         if (savedPreferences.getBoolean("easylist", true)) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 easyListPreference.setIcon(R.drawable.block_ads_enabled_dark);
             } else {
                 easyListPreference.setIcon(R.drawable.block_ads_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 easyListPreference.setIcon(R.drawable.block_ads_disabled_dark);
             } else {
                 easyListPreference.setIcon(R.drawable.block_ads_disabled_light);
@@ -321,22 +438,22 @@ public class SettingsFragment extends PreferenceFragment {
 
         // Set the EasyPrivacy icon.
         if (savedPreferences.getBoolean("easyprivacy", true)) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 easyPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_dark);
             } else {
                 easyPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 easyPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_dark);
             } else {
                 easyPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_light);
             }
         }
 
-        // Set the Fanboy list icons.
+        // Set the Fanboy lists icons.
         if (fanboyAnnoyanceListEnabled) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 // Set the Fanboy annoyance list icon.
                 fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_enabled_dark);
 
@@ -350,7 +467,7 @@ public class SettingsFragment extends PreferenceFragment {
                 fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_ghosted_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 // Set the Fanboy annoyance list icon.
                 fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_disabled_dark);
 
@@ -373,118 +490,189 @@ public class SettingsFragment extends PreferenceFragment {
             }
         }
 
-        // Set the Tor icons according to the theme.
-        if (proxyThroughOrbot) {  // Proxying is enabled.
-            if (MainWebViewActivity.darkTheme) {
-                proxyThroughOrbotPreference.setIcon(R.drawable.orbot_enabled_dark);
-                torHomepagePreference.setIcon(R.drawable.home_enabled_dark);
-                torSearchPreference.setIcon(R.drawable.search_enabled_dark);
+        // Set the UltraList icon.
+        if (savedPreferences.getBoolean("ultralist", true)){
+            if (darkTheme) {
+                ultraListPreference.setIcon(R.drawable.block_ads_enabled_dark);
+            } else {
+                ultraListPreference.setIcon(R.drawable.block_ads_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                ultraListPreference.setIcon(R.drawable.block_ads_disabled_dark);
+            } else {
+                ultraListPreference.setIcon(R.drawable.block_ads_disabled_light);
+            }
+        }
 
-                // Set the custom search icon.
-                if (torSearchCustomURLPreference.isEnabled()) {
-                    torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
-                } else {
-                    torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
-                }
+        // Set the UltraPrivacy icon.
+        if (savedPreferences.getBoolean("ultraprivacy", true)) {
+            if (darkTheme) {
+                ultraPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_dark);
             } else {
-                proxyThroughOrbotPreference.setIcon(R.drawable.orbot_enabled_light);
-                torHomepagePreference.setIcon(R.drawable.home_enabled_light);
-                torSearchPreference.setIcon(R.drawable.search_enabled_light);
+                ultraPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                ultraPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_dark);
+            } else {
+                ultraPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_light);
+            }
+        }
 
-                // Set the custom search icon.
-                if (torSearchCustomURLPreference.isEnabled()) {
-                    torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
-                } else {
-                    torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
-                }
+        // Set the block all third-party requests icon.
+        if (savedPreferences.getBoolean("block_all_third_party_requests", false)) {
+            if (darkTheme) {
+                blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_enabled_dark);
+            } else {
+                blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_enabled_light);
             }
-        } else {  // Proxying is disabled.
-            if (MainWebViewActivity.darkTheme) {
-                proxyThroughOrbotPreference.setIcon(R.drawable.orbot_disabled_dark);
-                torHomepagePreference.setIcon(R.drawable.home_ghosted_dark);
-                torSearchPreference.setIcon(R.drawable.search_ghosted_dark);
-                torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
+        } else {
+            if (darkTheme) {
+                blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_disabled_dark);
             } else {
-                proxyThroughOrbotPreference.setIcon(R.drawable.orbot_disabled_light);
-                torHomepagePreference.setIcon(R.drawable.home_ghosted_light);
-                torSearchPreference.setIcon(R.drawable.search_ghosted_light);
-                torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
+                blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_disabled_light);
             }
         }
 
-        // Set the `searchCustomURLPreference` icon.
+        // Set the Google Analytics icon according to the theme.
+        if (savedPreferences.getBoolean("google_analytics", true)) {
+            if (darkTheme) {
+                googleAnalyticsPreference.setIcon(R.drawable.modify_url_enabled_dark);
+            } else {
+                googleAnalyticsPreference.setIcon(R.drawable.modify_url_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                googleAnalyticsPreference.setIcon(R.drawable.modify_url_disabled_dark);
+            } else {
+                googleAnalyticsPreference.setIcon(R.drawable.modify_url_disabled_light);
+            }
+        }
+
+        // Set the Facebook Click IDs icon according to the theme.
+        if (savedPreferences.getBoolean("facebook_click_ids", true)) {
+            if (darkTheme) {
+                facebookClickIdsPreference.setIcon(R.drawable.modify_url_enabled_dark);
+            } else {
+                facebookClickIdsPreference.setIcon(R.drawable.modify_url_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                facebookClickIdsPreference.setIcon(R.drawable.modify_url_disabled_dark);
+            } else {
+                facebookClickIdsPreference.setIcon(R.drawable.modify_url_disabled_light);
+            }
+        }
+
+        // Set the Twitter AMP redirects icon according to the theme.
+        if (savedPreferences.getBoolean("twitter_amp_redirects", true)) {
+            if (darkTheme) {
+                twitterAmpRedirectsPreference.setIcon(R.drawable.modify_url_enabled_dark);
+            } else {
+                twitterAmpRedirectsPreference.setIcon(R.drawable.modify_url_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                twitterAmpRedirectsPreference.setIcon(R.drawable.modify_url_disabled_dark);
+            } else {
+                twitterAmpRedirectsPreference.setIcon(R.drawable.modify_url_disabled_light);
+            }
+        }
+
+        // Set the search custom URL icon.
         if (searchCustomURLPreference.isEnabled()) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 searchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
             } else {
                 searchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 searchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
             } else {
                 searchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
             }
         }
 
+        // Set the Proxy icons according to the theme and status.
+        if (proxyString.equals("None")) {  // Proxying is disabled.
+            if (darkTheme) {  // Dark theme.
+                // Set the main proxy icon to be disabled.
+                proxyPreference.setIcon(R.drawable.proxy_disabled_dark);
+
+                // Set the custom proxy URL icon to be ghosted.
+                proxyCustomUrlPreference.setIcon(R.drawable.proxy_ghosted_dark);
+            } else {  // Light theme.
+                // Set the main proxy icon to be disabled.
+                proxyPreference.setIcon(R.drawable.proxy_disabled_light);
+
+                // Set the custom proxy URL icon to be ghosted.
+                proxyCustomUrlPreference.setIcon(R.drawable.proxy_ghosted_light);
+            }
+        } else {  // Proxying is enabled.
+            if (darkTheme) {  // Dark theme.
+                // Set the main proxy icon to be enabled.
+                proxyPreference.setIcon(R.drawable.proxy_enabled_dark);
+
+                // Set the custom proxy URL icon according to its status.
+                if (proxyCustomUrlPreference.isEnabled()) {  // Custom proxy is enabled.
+                    proxyCustomUrlPreference.setIcon(R.drawable.proxy_enabled_dark);
+                } else {  // Custom proxy is disabled.
+                    proxyCustomUrlPreference.setIcon(R.drawable.proxy_ghosted_dark);
+                }
+            } else {  // Light theme.
+                // Set the main proxy icon to be enabled.
+                proxyPreference.setIcon(R.drawable.proxy_enabled_light);
+
+                // Set the custom proxy URL icon according to its status.
+                if (proxyCustomUrlPreference.isEnabled()) {  // Custom proxy is enabled.
+                    proxyCustomUrlPreference.setIcon(R.drawable.proxy_enabled_light);
+                } else {  // Custom proxy is disabled.
+                    proxyCustomUrlPreference.setIcon(R.drawable.proxy_ghosted_light);
+                }
+            }
+        }
+
         // Set the full screen browsing mode icons.
-        if (fullScreenBrowsingMode) {  // `fullScreenBrowsingModeBoolean` is `true`.
+        if (fullScreenBrowsingMode) {  // Full screen browsing mode is enabled.
             // Set the `fullScreenBrowsingModePreference` icon according to the theme.
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_dark);
             } else {
                 fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_light);
             }
 
-            if (hideSystemBars) {  // `hideSystemBarsBoolean` is `true`.
-                // Set the icons according to the theme.
-                if (MainWebViewActivity.darkTheme) {
-                    hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_enabled_dark);
-                    translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_dark);
+            // Set the hide app bar icon.
+            if (savedPreferences.getBoolean("hide_app_bar", true)) {  // Hide app bar is enabled.
+                // Set the icon according to the theme.
+                if (darkTheme) {
+                    hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
                 } else {
-                    hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_enabled_light);
-                    translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_light);
+                    hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
                 }
-            } else {  // `hideSystemBarsBoolean` is `false`.
-                // Set the `hideSystemBarsPreference` icon according to the theme.
-                if (MainWebViewActivity.darkTheme) {
-                    // Set the icon for `hideSystemBarsPreference`.
-                    hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_disabled_dark);
-
-                    // Set the icon for `translucentNavigationBarPreference`.
-                    if (savedPreferences.getBoolean("translucent_navigation_bar", true)) {
-                        translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_enabled_dark);
-                    } else {
-                        translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_disabled_dark);
-                    }
+            } else {  // Hide app bar is disabled.
+                // Set the icon according to the theme.
+                if (darkTheme) {
+                    hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
                 } else {
-                    // Set the icon for `hideSystemBarsPreference`.
-                    hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_disabled_light);
-
-                    // Set the icon for `translucentNavigationBarPreference`.
-                    if (savedPreferences.getBoolean("translucent_navigation_bar", true)) {
-                        translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_enabled_light);
-                    } else {
-                        translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_disabled_light);
-                    }
+                    hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
                 }
             }
-        } else {  // `fullScreenBrowsingModeBoolean` is `false`.
+        } else {  // Full screen browsing mode is disabled.
             // Set the icons according to the theme.
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_dark);
-                hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_ghosted_dark);
-                translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_dark);
+                hideAppBarPreference.setIcon(R.drawable.app_bar_ghosted_dark);
             } else {
                 fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_light);
-                hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_ghosted_light);
-                translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_light);
+                hideAppBarPreference.setIcon(R.drawable.app_bar_ghosted_light);
             }
         }
 
-        // Set the `clearEverythingPreference` icon.
+        // Set the clear everything preference icon.
         if (clearEverything) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 clearEverythingPreference.setIcon(R.drawable.clear_everything_enabled_dark);
             } else {
                 clearEverythingPreference.setIcon(R.drawable.clear_everything_enabled_light);
@@ -493,9 +681,9 @@ public class SettingsFragment extends PreferenceFragment {
             clearEverythingPreference.setIcon(R.drawable.clear_everything_disabled);
         }
 
-        // Set the `clearCookiesPreference` icon.
+        // Set the clear cookies preference icon.
         if (clearEverything || savedPreferences.getBoolean("clear_cookies", true)) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 clearCookiesPreference.setIcon(R.drawable.cookies_cleared_dark);
             } else {
                 clearCookiesPreference.setIcon(R.drawable.cookies_cleared_light);
@@ -504,9 +692,9 @@ public class SettingsFragment extends PreferenceFragment {
             clearCookiesPreference.setIcon(R.drawable.cookies_warning);
         }
 
-        // Set the `clearDomStoragePreference` icon.
+        // Set the clear DOM storage preference icon.
         if (clearEverything || savedPreferences.getBoolean("clear_dom_storage", true)) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_dark);
             } else {
                 clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_light);
@@ -515,20 +703,22 @@ public class SettingsFragment extends PreferenceFragment {
             clearDomStoragePreference.setIcon(R.drawable.dom_storage_warning);
         }
 
-        // Set the `clearFormDataPreference` icon.
-        if (clearEverything || savedPreferences.getBoolean("clear_form_data", true)) {
-            if (MainWebViewActivity.darkTheme) {
-                clearFormDataPreference.setIcon(R.drawable.form_data_cleared_dark);
+        // Set the clear form data preference icon if the API < 26.  It has no effect on newer versions of Android.
+        if (Build.VERSION.SDK_INT < 26) {
+            if (clearEverything || savedPreferences.getBoolean("clear_form_data", true)) {
+                if (darkTheme) {
+                    clearFormDataPreference.setIcon(R.drawable.form_data_cleared_dark);
+                } else {
+                    clearFormDataPreference.setIcon(R.drawable.form_data_cleared_light);
+                }
             } else {
-                clearFormDataPreference.setIcon(R.drawable.form_data_cleared_light);
+                clearFormDataPreference.setIcon(R.drawable.form_data_warning);
             }
-        } else {
-            clearFormDataPreference.setIcon(R.drawable.form_data_warning);
         }
 
-        // Set the `clearCachePreference` icon.
+        // Set the clear cache preference icon.
         if (clearEverything || savedPreferences.getBoolean("clear_cache", true)) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 clearCachePreference.setIcon(R.drawable.cache_cleared_dark);
             } else {
                 clearCachePreference.setIcon(R.drawable.cache_cleared_light);
@@ -537,67 +727,127 @@ public class SettingsFragment extends PreferenceFragment {
             clearCachePreference.setIcon(R.drawable.cache_warning);
         }
 
-        // Set the `swipeToRefreshPreference` icon.
-        if (savedPreferences.getBoolean("swipe_to_refresh", false)) {
-            if (MainWebViewActivity.darkTheme) {
+        // Set the open intents in new tab preference icon.
+        if (savedPreferences.getBoolean("open_intents_in_new_tab", true)) {
+            if (darkTheme) {
+                openIntentsInNewTabPreference.setIcon(R.drawable.tab_enabled_dark);
+            } else {
+                openIntentsInNewTabPreference.setIcon(R.drawable.tab_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                openIntentsInNewTabPreference.setIcon(R.drawable.tab_disabled_dark);
+            } else {
+                openIntentsInNewTabPreference.setIcon(R.drawable.tab_disabled_light);
+            }
+        }
+
+        // Set the swipe to refresh preference icon.
+        if (savedPreferences.getBoolean("swipe_to_refresh", true)) {
+            if (darkTheme) {
                 swipeToRefreshPreference.setIcon(R.drawable.refresh_enabled_dark);
             } else {
                 swipeToRefreshPreference.setIcon(R.drawable.refresh_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 swipeToRefreshPreference.setIcon(R.drawable.refresh_disabled_dark);
             } else {
                 swipeToRefreshPreference.setIcon(R.drawable.refresh_disabled_light);
             }
         }
 
-        // Set the `displayAdditionalAppBarIconsPreference` icon.
+        // Set the scroll app bar preference icon.
+        if (savedPreferences.getBoolean("scroll_app_bar", true)) {
+            if (darkTheme) {
+                scrollAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
+            } else {
+                scrollAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                scrollAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
+            } else {
+                scrollAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
+            }
+        }
+
+        // Set the display additional app bar icons preference icon.
         if (savedPreferences.getBoolean("display_additional_app_bar_icons", false)) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_enabled_dark);
             } else {
                 displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_disabled_dark);
             } else {
                 displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_disabled_light);
             }
         }
 
-        // Set the `darkThemePreference` icon.
+        // Set the download with external app preference icon.
+        if (savedPreferences.getBoolean("download_with_external_app", false)) {
+            if (darkTheme) {
+                downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_enabled_dark);
+            } else {
+                downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_disabled_dark);
+            } else {
+                downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_disabled_light);
+            }
+        }
+
+        // Set the dark theme preference icon.
         if (savedPreferences.getBoolean("dark_theme", false)) {
             darkThemePreference.setIcon(R.drawable.theme_dark);
         } else {
             darkThemePreference.setIcon(R.drawable.theme_light);
         }
 
-        // Set the `nightModePreference` icon.
+        // Set the night mode preference icon.
         if (nightMode) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 nightModePreference.setIcon(R.drawable.night_mode_enabled_dark);
             } else {
                 nightModePreference.setIcon(R.drawable.night_mode_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 nightModePreference.setIcon(R.drawable.night_mode_disabled_dark);
             } else {
                 nightModePreference.setIcon(R.drawable.night_mode_disabled_light);
             }
         }
 
-        // Set the `displayWebpageImagesPreference` icon.
+        // Set the wide viewport preference icon.
+        if (savedPreferences.getBoolean("wide_viewport", true)) {
+            if (darkTheme) {
+                wideViewportPreference.setIcon(R.drawable.wide_viewport_enabled_dark);
+            } else {
+                wideViewportPreference.setIcon(R.drawable.wide_viewport_enabled_light);
+            }
+        } else {
+            if (darkTheme) {
+                wideViewportPreference.setIcon(R.drawable.wide_viewport_disabled_dark);
+            } else {
+                wideViewportPreference.setIcon(R.drawable.wide_viewport_disabled_light);
+            }
+        }
+
+        // Set the display webpage images preference icon.
         if (savedPreferences.getBoolean("display_webpage_images", true)) {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 displayWebpageImagesPreference.setIcon(R.drawable.images_enabled_dark);
             } else {
                 displayWebpageImagesPreference.setIcon(R.drawable.images_enabled_light);
             }
         } else {
-            if (MainWebViewActivity.darkTheme) {
+            if (darkTheme) {
                 displayWebpageImagesPreference.setIcon(R.drawable.images_disabled_dark);
             } else {
                 displayWebpageImagesPreference.setIcon(R.drawable.images_disabled_light);
@@ -608,9 +858,9 @@ public class SettingsFragment extends PreferenceFragment {
         // Listen for preference changes.
         preferencesListener = (SharedPreferences sharedPreferences, String key) -> {
             switch (key) {
-                case "javascript_enabled":
+                case "javascript":
                     // Update the icons and the DOM storage preference status.
-                    if (sharedPreferences.getBoolean("javascript_enabled", false)) {  // The JavaScript preference is enabled.
+                    if (sharedPreferences.getBoolean("javascript", false)) {  // The JavaScript preference is enabled.
                         // Update the icon for the JavaScript preference.
                         javaScriptPreference.setIcon(R.drawable.javascript_enabled);
 
@@ -618,10 +868,10 @@ public class SettingsFragment extends PreferenceFragment {
                         domStoragePreference.setEnabled(true);
 
                         // Update the icon for the DOM storage preference.
-                        if (sharedPreferences.getBoolean("dom_storage_enabled", false)) {
+                        if (sharedPreferences.getBoolean("dom_storage", false)) {
                             domStoragePreference.setIcon(R.drawable.dom_storage_enabled);
                         } else {
-                            if (MainWebViewActivity.darkTheme) {
+                            if (darkTheme) {
                                 domStoragePreference.setIcon(R.drawable.dom_storage_disabled_dark);
                             } else {
                                 domStoragePreference.setIcon(R.drawable.dom_storage_disabled_light);
@@ -635,7 +885,7 @@ public class SettingsFragment extends PreferenceFragment {
                         domStoragePreference.setEnabled(false);
 
                         // Set the icon for DOM storage preference to be ghosted.
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_dark);
                         } else {
                             domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_light);
@@ -643,56 +893,56 @@ public class SettingsFragment extends PreferenceFragment {
                     }
                     break;
 
-                case "first_party_cookies_enabled":
-                    // Update the icons for `first_party_cookies_enabled` and `third_party_cookies_enabled`.
-                    if (sharedPreferences.getBoolean("first_party_cookies_enabled", false)) {
-                        // Set the icon for `first_party_cookies_enabled`.
+                case "first_party_cookies":
+                    // Update the icons for `first_party_cookies` and `third_party_cookies`.
+                    if (sharedPreferences.getBoolean("first_party_cookies", false)) {
+                        // Set the icon for `first_party_cookies`.
                         firstPartyCookiesPreference.setIcon(R.drawable.cookies_enabled);
 
-                        // Update the icon for `third_party_cookies_enabled`.
+                        // Update the icon for `third_party_cookies`.
                         if (Build.VERSION.SDK_INT >= 21) {
-                            if (sharedPreferences.getBoolean("third_party_cookies_enabled", false)) {
+                            if (sharedPreferences.getBoolean("third_party_cookies", false)) {
                                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_warning);
                             } else {
-                                if (MainWebViewActivity.darkTheme) {
+                                if (darkTheme) {
                                     thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
                                 } else {
                                     thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
                                 }
                             }
                         } else {
-                            if (MainWebViewActivity.darkTheme) {
+                            if (darkTheme) {
                                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_dark);
                             } else {
                                 thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_light);
                             }
                         }
-                    } else {  // `first_party_cookies_enabled` is `false`.
-                        // Update the icon for `first_party_cookies_enabled`.
-                        if (MainWebViewActivity.darkTheme) {
+                    } else {  // `first_party_cookies` is `false`.
+                        // Update the icon for `first_party_cookies`.
+                        if (darkTheme) {
                             firstPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
                         } else {
                             firstPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
                         }
 
-                        // Set the icon for `third_party_cookies_enabled` to be ghosted.
-                        if (MainWebViewActivity.darkTheme) {
+                        // Set the icon for `third_party_cookies` to be ghosted.
+                        if (darkTheme) {
                             thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_dark);
                         } else {
                             thirdPartyCookiesPreference.setIcon(R.drawable.cookies_ghosted_light);
                         }
                     }
 
-                    // Enable `third_party_cookies_enabled` if `first_party_cookies_enabled` is `true` and API >= 21.
-                    thirdPartyCookiesPreference.setEnabled(sharedPreferences.getBoolean("first_party_cookies_enabled", false) && (Build.VERSION.SDK_INT >= 21));
+                    // Enable `third_party_cookies` if `first_party_cookies` is `true` and API >= 21.
+                    thirdPartyCookiesPreference.setEnabled(sharedPreferences.getBoolean("first_party_cookies", false) && (Build.VERSION.SDK_INT >= 21));
                     break;
 
-                case "third_party_cookies_enabled":
+                case "third_party_cookies":
                     // Update the icon.
-                    if (sharedPreferences.getBoolean("third_party_cookies_enabled", false)) {
+                    if (sharedPreferences.getBoolean("third_party_cookies", false)) {
                         thirdPartyCookiesPreference.setIcon(R.drawable.cookies_warning);
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_dark);
                         } else {
                             thirdPartyCookiesPreference.setIcon(R.drawable.cookies_disabled_light);
@@ -700,12 +950,12 @@ public class SettingsFragment extends PreferenceFragment {
                     }
                     break;
 
-                case "dom_storage_enabled":
+                case "dom_storage":
                     // Update the icon.
-                    if (sharedPreferences.getBoolean("dom_storage_enabled", false)) {
+                    if (sharedPreferences.getBoolean("dom_storage", false)) {
                         domStoragePreference.setIcon(R.drawable.dom_storage_enabled);
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             domStoragePreference.setIcon(R.drawable.dom_storage_disabled_dark);
                         } else {
                             domStoragePreference.setIcon(R.drawable.dom_storage_disabled_light);
@@ -713,46 +963,56 @@ public class SettingsFragment extends PreferenceFragment {
                     }
                     break;
 
-                case "save_form_data_enabled":
+                // Save form data can be removed once the minimum API >= 26.
+                case "save_form_data":
                     // Update the icon.
-                    if (sharedPreferences.getBoolean("save_form_data_enabled", false)) {
-                        saveFormDataPreference.setIcon(R.drawable.form_data_enabled);
+                    if (sharedPreferences.getBoolean("save_form_data", false)) {
+                        formDataPreference.setIcon(R.drawable.form_data_enabled);
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
-                            saveFormDataPreference.setIcon(R.drawable.form_data_disabled_dark);
+                        if (darkTheme) {
+                            formDataPreference.setIcon(R.drawable.form_data_disabled_dark);
                         } else {
-                            saveFormDataPreference.setIcon(R.drawable.form_data_disabled_light);
+                            formDataPreference.setIcon(R.drawable.form_data_disabled_light);
                         }
                     }
+                    break;
 
                 case "user_agent":
-                    String userAgentString = sharedPreferences.getString("user_agent", "PrivacyBrowser/1.0");
+                    // Get the new user agent name.
+                    String newUserAgentName = sharedPreferences.getString("user_agent", getString(R.string.user_agent_default_value));
 
-                    switch (userAgentString) {
-                        case "WebView default user agent":
-                            // Display the user agent as the summary text for `userAgentPreference`.
-                            userAgentPreference.setSummary(bareWebView.getSettings().getUserAgentString());
+                    // Get the array position for the new user agent name.
+                    int newUserAgentArrayPosition = userAgentNamesArray.getPosition(newUserAgentName);
 
-                            // Disable `customUserAgentPreference`.
+                    // Get the translated new user agent name.
+                    String translatedNewUserAgentName = translatedUserAgentNamesArray[newUserAgentArrayPosition];
+
+                    // Populate the user agent summary.
+                    switch (newUserAgentArrayPosition) {
+                        case MainWebViewActivity.SETTINGS_WEBVIEW_DEFAULT_USER_AGENT:
+                            // Get the user agent text from the webview (which changes based on the version of Android and WebView installed).
+                            userAgentPreference.setSummary(translatedNewUserAgentName + ":\n" + bareWebView.getSettings().getUserAgentString());
+
+                            // Disable the custom user agent preference.
                             customUserAgentPreference.setEnabled(false);
 
-                            // Set the `customUserAgentPreference` icon according to the theme.
-                            if (MainWebViewActivity.darkTheme) {
+                            // Set the custom user agent preference icon according to the theme.
+                            if (darkTheme) {
                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_dark);
                             } else {
                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_light);
                             }
                             break;
 
-                        case "Custom user agent":
-                            // Display `Custom user agent` as the summary text for `userAgentPreference`.
+                        case MainWebViewActivity.SETTINGS_CUSTOM_USER_AGENT:
+                            // Set the summary text.
                             userAgentPreference.setSummary(R.string.custom_user_agent);
 
-                            // Enable `customUserAgentPreference`.
+                            // Enable the custom user agent preference.
                             customUserAgentPreference.setEnabled(true);
 
-                            // Set the `customUserAgentPreference` icon according to the theme.
-                            if (MainWebViewActivity.darkTheme) {
+                            // Set the custom user agent preference icon according to the theme.
+                            if (darkTheme) {
                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_enabled_dark);
                             } else {
                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_enabled_light);
@@ -760,37 +1020,36 @@ public class SettingsFragment extends PreferenceFragment {
                             break;
 
                         default:
-                            // Display the user agent as the summary text for `userAgentPreference`.
-                            userAgentPreference.setSummary(sharedPreferences.getString("user_agent", "PrivacyBrowser/1.0"));
+                            // Get the user agent summary from the user agent data array.
+                            userAgentPreference.setSummary(translatedNewUserAgentName + ":\n" + userAgentDataArray[newUserAgentArrayPosition]);
 
-                            // Disable `customUserAgentPreference`.
+                            // Disable the custom user agent preference.
                             customUserAgentPreference.setEnabled(false);
 
-                            // Set the `customUserAgentPreference` icon according to the theme.
-                            if (MainWebViewActivity.darkTheme) {
+                            // Set the custom user agent preference icon according to the theme.
+                            if (darkTheme) {
                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_dark);
                             } else {
                                 customUserAgentPreference.setIcon(R.drawable.custom_user_agent_ghosted_light);
                             }
-                            break;
                     }
                     break;
 
                 case "custom_user_agent":
-                    // Set the new custom user agent as the summary text for `custom_user_agent`.  The default is `PrivacyBrowser/1.0`.
-                    customUserAgentPreference.setSummary(sharedPreferences.getString("custom_user_agent", "PrivacyBrowser/1.0"));
+                    // Set the new custom user agent as the summary text for the preference.
+                    customUserAgentPreference.setSummary(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
                     break;
 
                 case "incognito_mode":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("incognito_mode", false)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             incognitoModePreference.setIcon(R.drawable.incognito_mode_enabled_dark);
                         } else {
                             incognitoModePreference.setIcon(R.drawable.incognito_mode_enabled_light);
                         }
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             incognitoModePreference.setIcon(R.drawable.incognito_mode_disabled_dark);
                         } else {
                             incognitoModePreference.setIcon(R.drawable.incognito_mode_disabled_light);
@@ -801,13 +1060,13 @@ public class SettingsFragment extends PreferenceFragment {
                 case "do_not_track":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("do_not_track", false)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             doNotTrackPreference.setIcon(R.drawable.block_tracking_enabled_dark);
                         } else {
                             doNotTrackPreference.setIcon(R.drawable.block_tracking_enabled_light);
                         }
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             doNotTrackPreference.setIcon(R.drawable.block_tracking_disabled_dark);
                         } else {
                             doNotTrackPreference.setIcon(R.drawable.block_tracking_disabled_light);
@@ -816,16 +1075,57 @@ public class SettingsFragment extends PreferenceFragment {
 
                     break;
 
+                case "allow_screenshots":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("allow_screenshots", false)) {
+                        if (darkTheme) {
+                            allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_enabled_dark);
+                        } else {
+                            allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_enabled_light);
+                        }
+                    } else {
+                        if (darkTheme) {
+                            allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_disabled_dark);
+                        } else {
+                            allowScreenshotsPreference.setIcon(R.drawable.allow_screenshots_disabled_light);
+                        }
+                    }
+
+                    // Create an intent to restart Privacy Browser.
+                    Intent allowScreenshotsRestartIntent = getActivity().getParentActivityIntent();
+
+                    // Assert that the intent is not null to remove the lint error below.
+                    assert allowScreenshotsRestartIntent != null;
+
+                    // `Intent.FLAG_ACTIVITY_CLEAR_TASK` removes all activities from the stack.  It requires `Intent.FLAG_ACTIVITY_NEW_TASK`.
+                    allowScreenshotsRestartIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
+
+                    // Create a handler to restart the activity.
+                    Handler allowScreenshotsRestartHandler = new Handler();
+
+                    // Create a runnable to restart the activity.
+                    Runnable allowScreenshotsRestartRunnable = () -> {
+                        // Restart the activity.
+                        startActivity(allowScreenshotsRestartIntent);
+
+                        // Kill this instance of Privacy Browser.  Otherwise, the app exhibits sporadic behavior after the restart.
+                        System.exit(0);
+                    };
+
+                    // Restart the activity after 150 milliseconds, so that the app has enough time to save the change to the preference.
+                    allowScreenshotsRestartHandler.postDelayed(allowScreenshotsRestartRunnable, 150);
+                    break;
+
                 case "easylist":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("easylist", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             easyListPreference.setIcon(R.drawable.block_ads_enabled_dark);
                         } else {
                             easyListPreference.setIcon(R.drawable.block_ads_enabled_light);
                         }
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             easyListPreference.setIcon(R.drawable.block_ads_disabled_dark);
                         } else {
                             easyListPreference.setIcon(R.drawable.block_ads_disabled_light);
@@ -836,13 +1136,13 @@ public class SettingsFragment extends PreferenceFragment {
                 case "easyprivacy":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("easyprivacy", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             easyPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_dark);
                         } else {
                             easyPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_light);
                         }
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             easyPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_dark);
                         } else {
                             easyPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_light);
@@ -850,13 +1150,13 @@ public class SettingsFragment extends PreferenceFragment {
                     }
                     break;
 
-                case "fanboy_annoyance_list":
-                    boolean currentFanboyAnnoyanceList = sharedPreferences.getBoolean("fanboy_annoyance_list", true);
-                    boolean currentFanboySocialBlockingList = sharedPreferences.getBoolean("fanboy_social_blocking_list", true);
+                case "fanboys_annoyance_list":
+                    boolean currentFanboyAnnoyanceList = sharedPreferences.getBoolean("fanboys_annoyance_list", true);
+                    boolean currentFanboySocialBlockingList = sharedPreferences.getBoolean("fanboys_social_blocking_list", true);
 
                     // Update the Fanboy icons.
-                    if (sharedPreferences.getBoolean("fanboy_annoyance_list", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                    if (currentFanboyAnnoyanceList) {  // Fanboy's annoyance list is enabled.
+                        if (darkTheme) {
                             // Update the Fanboy's annoyance list icon.
                             fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_enabled_dark);
 
@@ -869,16 +1169,16 @@ public class SettingsFragment extends PreferenceFragment {
                             // Update the Fanboy's social blocking list icon.
                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_ghosted_light);
                         }
-                    } else {
-                        if (MainWebViewActivity.darkTheme) {
+                    } else {  // Fanboy's annoyance list is disabled.
+                        if (darkTheme) {
                             // Update the Fanboy's annoyance list icon.
                             fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_disabled_dark);
 
                             // Update the Fanboy's social blocking list icon.
                             if (currentFanboySocialBlockingList) {
-                                fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_enabled_dark);
+                                fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_dark);
                             } else {
-                                fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_disabled_dark);
+                                fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_dark);
                             }
                         } else {
                             // Update the Fanboy's annoyance list icon.
@@ -886,9 +1186,9 @@ public class SettingsFragment extends PreferenceFragment {
 
                             // Update the Fanboy's social blocking list icon.
                             if (currentFanboySocialBlockingList) {
-                                fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_enabled_light);
+                                fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_light);
                             } else {
-                                fanboyAnnoyanceListPreference.setIcon(R.drawable.social_media_disabled_light);
+                                fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_light);
                             }
                         }
                     }
@@ -897,16 +1197,16 @@ public class SettingsFragment extends PreferenceFragment {
                     fanboySocialBlockingListPreference.setEnabled(!currentFanboyAnnoyanceList);
                     break;
 
-                case "fanboy_social_blocking_list":
+                case "fanboys_social_blocking_list":
                     // Update the icon.
-                    if (sharedPreferences.getBoolean("fanboy_social_blocking_list", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                    if (sharedPreferences.getBoolean("fanboys_social_blocking_list", true)) {
+                        if (darkTheme) {
                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_dark);
                         } else {
                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_enabled_light);
                         }
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_dark);
                         } else {
                             fanboySocialBlockingListPreference.setIcon(R.drawable.social_media_disabled_light);
@@ -914,102 +1214,111 @@ public class SettingsFragment extends PreferenceFragment {
                     }
                     break;
 
-                case "proxy_through_orbot":
-                    // Get current settings.
-                    boolean currentProxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
-                    String currentTorSearchString = sharedPreferences.getString("tor_search", "https://3g2upl4pq6kufc4m.onion/html/?q=");
-
-                    // Enable the Tor custom URL search option only if `currentProxyThroughOrbot` is true and the search is set to `Custom URL`.
-                    torSearchCustomURLPreference.setEnabled(currentProxyThroughOrbot && currentTorSearchString.equals("Custom URL"));
-
-                    // Update the icons.
-                    if (currentProxyThroughOrbot) {
-                        // Set the Tor icons according to the theme.
-                        if (MainWebViewActivity.darkTheme) {
-                            proxyThroughOrbotPreference.setIcon(R.drawable.orbot_enabled_dark);
-                            torHomepagePreference.setIcon(R.drawable.home_enabled_dark);
-                            torSearchPreference.setIcon(R.drawable.search_enabled_dark);
-
-                            // Set the `torSearchCustomURLPreference` icon.
-                            if (torSearchCustomURLPreference.isEnabled()) {
-                                torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
-                            } else {
-                                torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
-                            }
+                case "ultralist":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("ultralist", true)) {
+                        if (darkTheme) {
+                            ultraListPreference.setIcon(R.drawable.block_ads_enabled_dark);
                         } else {
-                            proxyThroughOrbotPreference.setIcon(R.drawable.orbot_enabled_light);
-                            torHomepagePreference.setIcon(R.drawable.home_enabled_light);
-                            torSearchPreference.setIcon(R.drawable.search_enabled_light);
-
-                            // Set the `torSearchCustomURLPreference` icon.
-                            if (torSearchCustomURLPreference.isEnabled()) {
-                                torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
-                            } else {
-                                torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
-                            }
+                            ultraListPreference.setIcon(R.drawable.block_ads_enabled_light);
                         }
-                    } else {  // Proxy through Orbot is disabled.
-                        if (MainWebViewActivity.darkTheme) {
-                            proxyThroughOrbotPreference.setIcon(R.drawable.orbot_disabled_dark);
-                            torHomepagePreference.setIcon(R.drawable.home_ghosted_dark);
-                            torSearchPreference.setIcon(R.drawable.search_ghosted_dark);
-                            torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
+                    } else {
+                        if (darkTheme) {
+                            ultraListPreference.setIcon(R.drawable.block_ads_disabled_dark);
                         } else {
-                            proxyThroughOrbotPreference.setIcon(R.drawable.orbot_disabled_light);
-                            torHomepagePreference.setIcon(R.drawable.home_ghosted_light);
-                            torSearchPreference.setIcon(R.drawable.search_ghosted_light);
-                            torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
+                            ultraListPreference.setIcon(R.drawable.block_ads_disabled_light);
                         }
                     }
                     break;
 
-                case "tor_homepage":
-                    // Set the new tor homepage URL as the summary text for the `tor_homepage` preference.  The default is DuckDuckGo:  `https://3g2upl4pq6kufc4m.onion`.
-                    torHomepagePreference.setSummary(sharedPreferences.getString("tor_homepage", "https://3g2upl4pq6kufc4m.onion"));
+                case "ultraprivacy":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("ultraprivacy", true)) {
+                        if (darkTheme) {
+                            ultraPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_dark);
+                        } else {
+                            ultraPrivacyPreference.setIcon(R.drawable.block_tracking_enabled_light);
+                        }
+                    } else {
+                        if (darkTheme) {
+                            ultraPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_dark);
+                        } else {
+                            ultraPrivacyPreference.setIcon(R.drawable.block_tracking_disabled_light);
+                        }
+                    }
                     break;
 
-                case "tor_search":
-                    // Get the present search string.
-                    String presentTorSearchString = sharedPreferences.getString("tor_search", "https://3g2upl4pq6kufc4m.onion/html/?q=");
-
-                    // Update the preferences.
-                    if (presentTorSearchString.equals("Custom URL")) {
-                        // Use `R.string.custom_url`, which is translated, as the summary instead of the array value, which isn't.
-                        torSearchPreference.setSummary(R.string.custom_url);
-
-                        // Enable `torSearchCustomURLPreference`.
-                        torSearchCustomURLPreference.setEnabled(true);
-
-                        // Update the `torSearchCustomURLPreference` icon.
-                        if (MainWebViewActivity.darkTheme) {
-                            torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
+                case "block_all_third_party_requests":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("block_all_third_party_requests", false)) {
+                        if (darkTheme) {
+                            blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_enabled_dark);
                         } else {
-                            torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
+                            blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_enabled_light);
                         }
                     } else {
-                        // Set the array value as the summary text.
-                        torSearchPreference.setSummary(presentTorSearchString);
+                        if (darkTheme) {
+                            blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_disabled_dark);
+                        } else {
+                            blockAllThirdPartyRequestsPreference.setIcon(R.drawable.block_all_third_party_requests_disabled_light);
+                        }
+                    }
+                    break;
 
-                        // Disable `torSearchCustomURLPreference`.
-                        torSearchCustomURLPreference.setEnabled(false);
+                case "google_analytics":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("google_analytics", true)) {
+                        if (darkTheme) {
+                            googleAnalyticsPreference.setIcon(R.drawable.modify_url_enabled_dark);
+                        } else {
+                            googleAnalyticsPreference.setIcon(R.drawable.modify_url_enabled_light);
+                        }
+                    } else {
+                        if (darkTheme) {
+                            googleAnalyticsPreference.setIcon(R.drawable.modify_url_disabled_dark);
+                        } else {
+                            googleAnalyticsPreference.setIcon(R.drawable.modify_url_disabled_light);
+                        }
+                    }
+                    break;
 
-                        // Update the `torSearchCustomURLPreference` icon.
-                        if (MainWebViewActivity.darkTheme) {
-                            torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
+                case "facebook_click_ids":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("facebook_click_ids", true)) {
+                        if (darkTheme) {
+                            facebookClickIdsPreference.setIcon(R.drawable.modify_url_enabled_dark);
+                        } else {
+                            facebookClickIdsPreference.setIcon(R.drawable.modify_url_enabled_light);
+                        }
+                    } else {
+                        if (darkTheme) {
+                            facebookClickIdsPreference.setIcon(R.drawable.modify_url_disabled_dark);
                         } else {
-                            torSearchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
+                            facebookClickIdsPreference.setIcon(R.drawable.modify_url_disabled_light);
                         }
                     }
                     break;
 
-                case "tor_search_custom_url":
-                    // Set the summary text for `tor_search_custom_url`.
-                    torSearchCustomURLPreference.setSummary(sharedPreferences.getString("tor_search_custom_url", ""));
+                case "twitter_amp_redirects":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("twitter_amp_redirects", true)) {
+                        if (darkTheme) {
+                            twitterAmpRedirectsPreference.setIcon(R.drawable.modify_url_enabled_dark);
+                        } else {
+                            twitterAmpRedirectsPreference.setIcon(R.drawable.modify_url_enabled_light);
+                        }
+                    } else {
+                        if (darkTheme) {
+                            twitterAmpRedirectsPreference.setIcon(R.drawable.modify_url_disabled_dark);
+                        } else {
+                            twitterAmpRedirectsPreference.setIcon(R.drawable.modify_url_disabled_light);
+                        }
+                    }
                     break;
 
                 case "search":
                     // Store the new search string.
-                    String newSearchString = sharedPreferences.getString("search", "https://duckduckgo.com/html/?q=");
+                    String newSearchString = sharedPreferences.getString("search", getString(R.string.search_default_value));
 
                     // Update `searchPreference` and `searchCustomURLPreference`.
                     if (newSearchString.equals("Custom URL")) {  // `Custom URL` is selected.
@@ -1020,7 +1329,7 @@ public class SettingsFragment extends PreferenceFragment {
                         searchCustomURLPreference.setEnabled(true);
 
                         // Set the `searchCustomURLPreference` according to the theme.
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             searchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_dark);
                         } else {
                             searchCustomURLPreference.setIcon(R.drawable.search_custom_url_enabled_light);
@@ -1033,7 +1342,7 @@ public class SettingsFragment extends PreferenceFragment {
                         searchCustomURLPreference.setEnabled(false);
 
                         // Set the `searchCustomURLPreference` according to the theme.
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             searchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_dark);
                         } else {
                             searchCustomURLPreference.setIcon(R.drawable.search_custom_url_ghosted_light);
@@ -1043,129 +1352,136 @@ public class SettingsFragment extends PreferenceFragment {
 
                 case "search_custom_url":
                     // Set the new custom search URL as the summary text for `search_custom_url`.  The default is `""`.
-                    searchCustomURLPreference.setSummary(sharedPreferences.getString("search_custom_url", ""));
+                    searchCustomURLPreference.setSummary(sharedPreferences.getString("search_custom_url", getString(R.string.search_custom_url_default_value)));
                     break;
 
-                case "full_screen_browsing_mode":
-                    if (sharedPreferences.getBoolean("full_screen_browsing_mode", false)) {
-                        // Set the `fullScreenBrowsingModePreference` icon according to the theme.
-                        if (MainWebViewActivity.darkTheme) {
-                            fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_dark);
-                        } else {
-                            fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_light);
-                        }
+                case "proxy":
+                    // Get current proxy string.
+                    String currentProxyString = sharedPreferences.getString("proxy", getString(R.string.proxy_default_value));
 
-                        if (sharedPreferences.getBoolean("hide_system_bars", false)) {  // `hide_system_bars` is `true`.
-                            // Disable `translucentNavigationBarPreference`.
-                            translucentNavigationBarPreference.setEnabled(false);
+                    // Update the summary text for the proxy preference.
+                    switch (currentProxyString) {
+                        case ProxyHelper.NONE:
+                            proxyPreference.setSummary(getString(R.string.no_proxy_enabled));
+                            break;
 
-                            // Set the icons according to the theme.
-                            if (MainWebViewActivity.darkTheme) {
-                                hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_enabled_dark);
-                                translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_dark);
+                        case ProxyHelper.TOR:
+                            if (Build.VERSION.SDK_INT == 19) {  // Proxying through SOCKS doesn't work on Android KitKat.
+                                proxyPreference.setSummary(getString(R.string.tor_enabled_kitkat));
                             } else {
-                                hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_enabled_light);
-                                translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_light);
+                                proxyPreference.setSummary(getString(R.string.tor_enabled));
                             }
-                        } else {  // `hide_system_bars` is `false`.
-                            // Enable `translucentNavigationBarPreference`.
-                            translucentNavigationBarPreference.setEnabled(true);
-
-                            // Set the icons according to the theme.
-                            if (MainWebViewActivity.darkTheme) {  // Use the dark theme.
-                                // Set the `hideSystemBarsPreference` icon.
-                                hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_disabled_dark);
-
-                                // Set the `translucentNavigationBarPreference` icon.
-                                if (sharedPreferences.getBoolean("translucent_navigation_bar", true)) {
-                                    translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_enabled_dark);
-                                } else {
-                                    translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_disabled_dark);
-                                }
-                            } else {  // Use the light theme.
-                                // Set the `hideSystemBarsPreference` icon.
-                                hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_disabled_light);
+                            break;
 
-                                // Set the `translucentNavigationBarPreference` icon.
-                                if (sharedPreferences.getBoolean("translucent_navigation_bar", true)) {
-                                    translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_enabled_light);
-                                } else {
-                                    translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_disabled_light);
-                                }
-                            }
-                        }
-                    } else {  // `full_screen_browsing_mode` is false.
-                        // Disable `translucentNavigationBarPreference`.
-                        translucentNavigationBarPreference.setEnabled(false);
+                        case ProxyHelper.I2P:
+                            proxyPreference.setSummary(getString(R.string.i2p_enabled));
+                            break;
 
-                        // Update the icons according to the theme.
-                        if (MainWebViewActivity.darkTheme) {
-                            fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_dark);
-                            hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_ghosted_dark);
-                            translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_dark);
-                        } else {
-                            fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_light);
-                            hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_ghosted_light);
-                            translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_light);
+                        case ProxyHelper.CUSTOM:
+                            proxyPreference.setSummary(getString(R.string.custom_proxy));
+                            break;
+                    }
+
+                    // Update the status of the custom URL preference.
+                    proxyCustomUrlPreference.setEnabled(currentProxyString.equals("Custom"));
+
+                    // Update the icons.
+                    if (currentProxyString.equals("None")) {  // Proxying is disabled.
+                        if (darkTheme) {  // Dark theme.
+                            // Set the main proxy icon to be disabled
+                            proxyPreference.setIcon(R.drawable.proxy_disabled_dark);
+
+                            // Set the custom proxy URL icon to be ghosted.
+                            proxyCustomUrlPreference.setIcon(R.drawable.proxy_ghosted_dark);
+                        } else {  // Light theme.
+                            // Set the main proxy icon to be disabled.
+                            proxyPreference.setIcon(R.drawable.proxy_disabled_light);
+
+                            // Set the custom proxy URL icon to be ghosted.
+                            proxyCustomUrlPreference.setIcon(R.drawable.proxy_ghosted_light);
+                        }
+                    } else {  // Proxying is enabled.
+                        if (darkTheme) {  // Dark theme.
+                            // Set the main proxy icon to be enabled.
+                            proxyPreference.setIcon(R.drawable.proxy_enabled_dark);
+
+                            /// Set the custom proxy URL icon according to its status.
+                            if (proxyCustomUrlPreference.isEnabled()) {  // Custom proxy is enabled.
+                                proxyCustomUrlPreference.setIcon(R.drawable.proxy_enabled_dark);
+                            } else {  // Custom proxy is disabled.
+                                proxyCustomUrlPreference.setIcon(R.drawable.proxy_ghosted_dark);
+                            }
+                        } else {  // Light theme.
+                            // Set the main proxy icon to be enabled.
+                            proxyPreference.setIcon(R.drawable.proxy_enabled_light);
+
+                            // Set the custom proxy URL icon according to its status.
+                            if (proxyCustomUrlPreference.isEnabled()) {  // Custom proxy is enabled.
+                                proxyCustomUrlPreference.setIcon(R.drawable.proxy_enabled_light);
+                            } else {  // Custom proxy is disabled.
+                                proxyCustomUrlPreference.setIcon(R.drawable.proxy_ghosted_light);
+                            }
                         }
                     }
                     break;
 
-                case "hide_system_bars":
-                    if (sharedPreferences.getBoolean("hide_system_bars", false)) {
-                        // Disable `translucentNavigationBarPreference`.
-                        translucentNavigationBarPreference.setEnabled(false);
+                case "proxy_custom_url":
+                    // Set the summary text for the proxy custom URL.
+                    proxyCustomUrlPreference.setSummary(sharedPreferences.getString("proxy_custom_url", getString(R.string.proxy_custom_url_default_value)));
+                    break;
 
-                        // Set the icons according to the theme.
-                        if (MainWebViewActivity.darkTheme) {
-                            hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_enabled_dark);
-                            translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_dark);
+                case "full_screen_browsing_mode":
+                    if (sharedPreferences.getBoolean("full_screen_browsing_mode", false)) {  // Full screen browsing is enabled.
+                        // Set the full screen browsing mode preference icon according to the theme.
+                        if (darkTheme) {
+                            fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_dark);
                         } else {
-                            hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_enabled_light);
-                            translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_ghosted_light);
+                            fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_enabled_light);
                         }
-                    } else {  // `hide_system_bars` is false.
-                        // Enable `translucentNavigationBarPreference`.
-                        translucentNavigationBarPreference.setEnabled(true);
 
-                        // Set the icons according to the theme.
-                        if (MainWebViewActivity.darkTheme) {
-                            // Set the `hideSystemBarsPreference` icon.
-                            hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_disabled_dark);
-
-                            // Set the `translucentNavigationBarPreference` icon.
-                            if (sharedPreferences.getBoolean("translucent_navigation_bar", true)) {
-                                translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_enabled_dark);
+                        // Set the hide app bar preference icon.
+                        if (sharedPreferences.getBoolean("hide_app_bar", true)) {  //  Hide app bar is enabled.
+                            // Set the icon according to the theme.
+                            if (darkTheme) {
+                                hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
                             } else {
-                                translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_disabled_dark);
+                                hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
                             }
-                        } else {
-                            // Set the `hideSystemBarsPreference` icon.
-                            hideSystemBarsPreference.setIcon(R.drawable.hide_system_bars_disabled_light);
-
-                            // Set the `translucentNavigationBarPreference` icon.
-                            if (sharedPreferences.getBoolean("translucent_navigation_bar", true)) {
-                                translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_enabled_light);
+                        } else {  // Hide app bar is disabled.
+                            // Set the icon according to the theme.
+                            if (darkTheme) {
+                                hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
                             } else {
-                                translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_disabled_light);
+                                hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
                             }
                         }
+                    } else {  // Full screen browsing is disabled.
+                        // Update the icons according to the theme.
+                        if (darkTheme) {
+                            fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_dark);
+                            hideAppBarPreference.setIcon(R.drawable.app_bar_ghosted_dark);
+                        } else {
+                            fullScreenBrowsingModePreference.setIcon(R.drawable.full_screen_disabled_light);
+                            hideAppBarPreference.setIcon(R.drawable.app_bar_ghosted_light);
+                        }
                     }
                     break;
 
-                case "translucent_navigation_bar":
+                case "hide_app_bar":
                     // Update the icon.
-                    if (sharedPreferences.getBoolean("translucent_navigation_bar", true)) {
-                        if (MainWebViewActivity.darkTheme) {
-                            translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_enabled_dark);
+                    if (sharedPreferences.getBoolean("hide_app_bar", true)) {  // Hide app bar is enabled.
+                        // Set the icon according to the theme.
+                        if (darkTheme) {
+                            hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
                         } else {
-                            translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_enabled_light);
+                            hideAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
                         }
-                    } else {
-                        if (MainWebViewActivity.darkTheme) {
-                            translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_disabled_dark);
+                    } else {  // Hide app bar is disabled.
+                        // Set the icon according to the theme.
+                        if (darkTheme) {
+                            hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
                         } else {
-                            translucentNavigationBarPreference.setIcon(R.drawable.translucent_bar_disabled_light);
+                            hideAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
                         }
                     }
                     break;
@@ -1177,12 +1493,12 @@ public class SettingsFragment extends PreferenceFragment {
                     // Update the status of the `Clear and Exit` preferences.
                     clearCookiesPreference.setEnabled(!newClearEverythingBoolean);
                     clearDomStoragePreference.setEnabled(!newClearEverythingBoolean);
-                    clearFormDataPreference.setEnabled(!newClearEverythingBoolean);
+                    clearFormDataPreference.setEnabled(!newClearEverythingBoolean);  // This line can be removed once the minimum API >= 26.
                     clearCachePreference.setEnabled(!newClearEverythingBoolean);
 
                     // Update the `clearEverythingPreference` icon.
                     if (newClearEverythingBoolean) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             clearEverythingPreference.setIcon(R.drawable.clear_everything_enabled_dark);
                         } else {
                             clearEverythingPreference.setIcon(R.drawable.clear_everything_enabled_light);
@@ -1193,7 +1509,7 @@ public class SettingsFragment extends PreferenceFragment {
 
                     // Update the `clearCookiesPreference` icon.
                     if (newClearEverythingBoolean || sharedPreferences.getBoolean("clear_cookies", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             clearCookiesPreference.setIcon(R.drawable.cookies_cleared_dark);
                         } else {
                             clearCookiesPreference.setIcon(R.drawable.cookies_cleared_light);
@@ -1204,7 +1520,7 @@ public class SettingsFragment extends PreferenceFragment {
 
                     // Update the `clearDomStoragePreference` icon.
                     if (newClearEverythingBoolean || sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_dark);
                         } else {
                             clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_light);
@@ -1213,20 +1529,22 @@ public class SettingsFragment extends PreferenceFragment {
                         clearDomStoragePreference.setIcon(R.drawable.dom_storage_warning);
                     }
 
-                    // Update the `clearFormDataPreference` icon.
-                    if (newClearEverythingBoolean || sharedPreferences.getBoolean("clear_form_data", true)) {
-                        if (MainWebViewActivity.darkTheme) {
-                            clearFormDataPreference.setIcon(R.drawable.form_data_cleared_dark);
+                    // Update the clear form data preference icon if the API < 26.
+                    if (Build.VERSION.SDK_INT < 26) {
+                        if (newClearEverythingBoolean || sharedPreferences.getBoolean("clear_form_data", true)) {
+                            if (darkTheme) {
+                                clearFormDataPreference.setIcon(R.drawable.form_data_cleared_dark);
+                            } else {
+                                clearFormDataPreference.setIcon(R.drawable.form_data_cleared_light);
+                            }
                         } else {
-                            clearFormDataPreference.setIcon(R.drawable.form_data_cleared_light);
+                            clearFormDataPreference.setIcon(R.drawable.form_data_warning);
                         }
-                    } else {
-                        clearFormDataPreference.setIcon(R.drawable.form_data_warning);
                     }
 
                     // Update the `clearCachePreference` icon.
                     if (newClearEverythingBoolean || sharedPreferences.getBoolean("clear_cache", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             clearCachePreference.setIcon(R.drawable.cache_cleared_dark);
                         } else {
                             clearCachePreference.setIcon(R.drawable.cache_cleared_light);
@@ -1239,7 +1557,7 @@ public class SettingsFragment extends PreferenceFragment {
                 case "clear_cookies":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("clear_cookies", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             clearCookiesPreference.setIcon(R.drawable.cookies_cleared_dark);
                         } else {
                             clearCookiesPreference.setIcon(R.drawable.cookies_cleared_light);
@@ -1252,7 +1570,7 @@ public class SettingsFragment extends PreferenceFragment {
                 case "clear_dom_storage":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("clear_dom_storage", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_dark);
                         } else {
                             clearDomStoragePreference.setIcon(R.drawable.dom_storage_cleared_light);
@@ -1262,10 +1580,11 @@ public class SettingsFragment extends PreferenceFragment {
                     }
                     break;
 
+                // This section can be removed once the minimum API >= 26.
                 case "clear_form_data":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("clear_form_data", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             clearFormDataPreference.setIcon(R.drawable.form_data_cleared_dark);
                         } else {
                             clearFormDataPreference.setIcon(R.drawable.form_data_cleared_light);
@@ -1278,7 +1597,7 @@ public class SettingsFragment extends PreferenceFragment {
                 case "clear_cache":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("clear_cache", true)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             clearCachePreference.setIcon(R.drawable.cache_cleared_dark);
                         } else {
                             clearCachePreference.setIcon(R.drawable.cache_cleared_light);
@@ -1289,25 +1608,42 @@ public class SettingsFragment extends PreferenceFragment {
                     break;
 
                 case "homepage":
-                    // Set the new homepage URL as the summary text for the Homepage preference.  The default is `https://www.duckduckgo.com`.
-                    homepagePreference.setSummary(sharedPreferences.getString("homepage", "https://www.duckduckgo.com"));
+                    // Set the new homepage URL as the summary text for the Homepage preference.
+                    homepagePreference.setSummary(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
                     break;
 
-                case "default_font_size":
-                    // Update the summary text of `default_font_size`.
-                    defaultFontSizePreference.setSummary(sharedPreferences.getString("default_font_size", "100") + "%%");
+                case "font_size":
+                    // Update the font size summary text.
+                    fontSizePreference.setSummary(sharedPreferences.getString("font_size", getString(R.string.font_size_default_value)) + "%");
+                    break;
+
+                case "open_intents_in_new_tab":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {
+                        if (darkTheme) {
+                            openIntentsInNewTabPreference.setIcon(R.drawable.tab_enabled_dark);
+                        } else {
+                            openIntentsInNewTabPreference.setIcon(R.drawable.tab_enabled_light);
+                        }
+                    } else {
+                        if (darkTheme) {
+                            openIntentsInNewTabPreference.setIcon(R.drawable.tab_disabled_dark);
+                        } else {
+                            openIntentsInNewTabPreference.setIcon(R.drawable.tab_disabled_light);
+                        }
+                    }
                     break;
 
                 case "swipe_to_refresh":
                     // Update the icon.
-                    if (sharedPreferences.getBoolean("swipe_to_refresh", false)) {
-                        if (MainWebViewActivity.darkTheme) {
+                    if (sharedPreferences.getBoolean("swipe_to_refresh", true)) {
+                        if (darkTheme) {
                             swipeToRefreshPreference.setIcon(R.drawable.refresh_enabled_dark);
                         } else {
                             swipeToRefreshPreference.setIcon(R.drawable.refresh_enabled_light);
                         }
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             swipeToRefreshPreference.setIcon(R.drawable.refresh_disabled_dark);
                         } else {
                             swipeToRefreshPreference.setIcon(R.drawable.refresh_disabled_light);
@@ -1315,16 +1651,33 @@ public class SettingsFragment extends PreferenceFragment {
                     }
                     break;
 
+                case "scroll_app_bar":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("scroll_app_bar", true)) {
+                        if (darkTheme) {
+                            scrollAppBarPreference.setIcon(R.drawable.app_bar_enabled_dark);
+                        } else {
+                            scrollAppBarPreference.setIcon(R.drawable.app_bar_enabled_light);
+                        }
+                    } else {
+                        if (darkTheme) {
+                            scrollAppBarPreference.setIcon(R.drawable.app_bar_disabled_dark);
+                        } else {
+                            scrollAppBarPreference.setIcon(R.drawable.app_bar_disabled_light);
+                        }
+                    }
+                    break;
+
                 case "display_additional_app_bar_icons":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("display_additional_app_bar_icons", false)) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_enabled_dark);
                         } else {
                             displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_enabled_light);
                         }
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_disabled_dark);
                         } else {
                             displayAdditionalAppBarIconsPreference.setIcon(R.drawable.more_disabled_light);
@@ -1332,6 +1685,23 @@ public class SettingsFragment extends PreferenceFragment {
                     }
                     break;
 
+                case "download_with_external_app":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("download_with_external_app", false)) {
+                        if (darkTheme) {
+                            downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_enabled_dark);
+                        } else {
+                            downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_enabled_light);
+                        }
+                    } else {
+                        if (darkTheme) {
+                            downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_disabled_dark);
+                        } else {
+                            downloadWithExternalAppPreference.setIcon(R.drawable.open_with_external_app_disabled_light);
+                        }
+                    }
+                    break;
+
                 case "dark_theme":
                     // Update the icon.
                     if (sharedPreferences.getBoolean("dark_theme", false)) {
@@ -1340,36 +1710,45 @@ public class SettingsFragment extends PreferenceFragment {
                         darkThemePreference.setIcon(R.drawable.theme_light);
                     }
 
-                    // Create an `Intent` to restart Privacy Browser.
-                    Intent intent = getActivity().getParentActivityIntent();
+                    // Create an intent to restart Privacy Browser.
+                    Intent changeThemeRestartIntent = getActivity().getParentActivityIntent();
 
-                    // Assert that `intent` is not `null` to remove the lint error below.
-                    assert intent != null;
+                    // Assert that the intent is not null to remove the lint error below.
+                    assert changeThemeRestartIntent != null;
 
                     // `Intent.FLAG_ACTIVITY_CLEAR_TASK` removes all activities from the stack.  It requires `Intent.FLAG_ACTIVITY_NEW_TASK`.
-                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
+                    changeThemeRestartIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
+
+                    // Create a handler to restart the activity.
+                    Handler changeThemeRestartHandler = new Handler();
+
+                    // Create a runnable to restart the activity.
+                    Runnable changeThemeRestartRunnable = () -> {
+                        // Restart the activity.
+                        startActivity(changeThemeRestartIntent);
 
-                    // Make it so.
-                    startActivity(intent);
+                        // Kill this instance of Privacy Browser.  Otherwise, the app exhibits sporadic behavior after the restart.
+                        System.exit(0);
+                    };
+
+                    // Restart the activity after 150 milliseconds, so that the app has enough time to save the change to the preference.
+                    changeThemeRestartHandler.postDelayed(changeThemeRestartRunnable, 150);
                     break;
 
                 case "night_mode":
-                    // Set the URL to be reloaded on restart to apply the new night mode setting.
-                    MainWebViewActivity.loadUrlOnRestart = true;
-
                     // Store the current night mode status.
                     boolean currentNightModeBoolean = sharedPreferences.getBoolean("night_mode", false);
-                    boolean currentJavaScriptBoolean = sharedPreferences.getBoolean("javascript_enabled", false);
+                    boolean currentJavaScriptBoolean = sharedPreferences.getBoolean("javascript", false);
 
                     // Update the icon.
                     if (currentNightModeBoolean) {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             nightModePreference.setIcon(R.drawable.night_mode_enabled_dark);
                         } else {
                             nightModePreference.setIcon(R.drawable.night_mode_enabled_light);
                         }
                     } else {
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             nightModePreference.setIcon(R.drawable.night_mode_disabled_dark);
                         } else {
                             nightModePreference.setIcon(R.drawable.night_mode_disabled_light);
@@ -1387,19 +1766,19 @@ public class SettingsFragment extends PreferenceFragment {
                         javaScriptPreference.setIcon(R.drawable.privacy_mode);
                     }
 
-                    // Update the `domStoragePreference` icon.
+                    // Update the DOM storage preference icon.
                     if (currentNightModeBoolean || currentJavaScriptBoolean) {  // The preference is enabled.
-                        if (sharedPreferences.getBoolean("dom_storage_enabled", false)) {  // DOM storage is enabled.
+                        if (sharedPreferences.getBoolean("dom_storage", false)) {  // DOM storage is enabled.
                             domStoragePreference.setIcon(R.drawable.dom_storage_enabled);
                         } else {  // DOM storage is disabled.
-                            if (MainWebViewActivity.darkTheme) {
+                            if (darkTheme) {
                                 domStoragePreference.setIcon(R.drawable.dom_storage_disabled_dark);
                             } else {
                                 domStoragePreference.setIcon(R.drawable.dom_storage_disabled_light);
                             }
                         }
                     } else {  // The preference is disabled.  The icon should be ghosted.
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_dark);
                         } else {
                             domStoragePreference.setIcon(R.drawable.dom_storage_ghosted_light);
@@ -1407,27 +1786,37 @@ public class SettingsFragment extends PreferenceFragment {
                     }
                     break;
 
+                case "wide_viewport":
+                    // Update the icon.
+                    if (sharedPreferences.getBoolean("wide_viewport", true)) {
+                        if (darkTheme) {
+                            wideViewportPreference.setIcon(R.drawable.wide_viewport_enabled_dark);
+                        } else {
+                            wideViewportPreference.setIcon(R.drawable.wide_viewport_enabled_light);
+                        }
+                    } else {
+                        if (darkTheme) {
+                            wideViewportPreference.setIcon(R.drawable.wide_viewport_disabled_dark);
+                        } else {
+                            wideViewportPreference.setIcon(R.drawable.wide_viewport_disabled_light);
+                        }
+                    }
+                    break;
+
                 case "display_webpage_images":
+                    // Update the icon.
                     if (sharedPreferences.getBoolean("display_webpage_images", true)) {
-                        // Update the icon.
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             displayWebpageImagesPreference.setIcon(R.drawable.images_enabled_dark);
                         } else {
                             displayWebpageImagesPreference.setIcon(R.drawable.images_enabled_light);
                         }
-
-                        // `mainWebView` does not need to be reloaded because unloaded images will load automatically.
-                        MainWebViewActivity.reloadOnRestart = false;
                     } else {
-                        // Update the icon.
-                        if (MainWebViewActivity.darkTheme) {
+                        if (darkTheme) {
                             displayWebpageImagesPreference.setIcon(R.drawable.images_disabled_dark);
                         } else {
                             displayWebpageImagesPreference.setIcon(R.drawable.images_disabled_light);
                         }
-
-                        // Set `mainWebView` to reload on restart to remove the current images.
-                        MainWebViewActivity.reloadOnRestart = true;
                     }
                     break;
             }
@@ -1437,8 +1826,7 @@ public class SettingsFragment extends PreferenceFragment {
         savedPreferences.registerOnSharedPreferenceChangeListener(preferencesListener);
     }
 
-    // It is necessary to re-register the listener on every resume or it will randomly stop working because apps can be paused and resumed at any time
-    // even while running in the foreground.
+    // It is necessary to re-register the listener on every resume or it will randomly stop working because apps can be paused and resumed at any time, even while running in the foreground.
     @Override
     public void onPause() {
         super.onPause();
@@ -1450,4 +1838,4 @@ public class SettingsFragment extends PreferenceFragment {
         super.onResume();
         savedPreferences.registerOnSharedPreferenceChangeListener(preferencesListener);
     }
-}
+}
\ No newline at end of file