app links setting

app/lib/features/geckoview/features/browser/domain/providers.dart

@@ -19,6 +19,7 @@
  */
 import 'package:collection/collection.dart';
 import 'package:fast_equatable/fast_equatable.dart';
+import 'package:flutter_mozilla_components/flutter_mozilla_components.dart';
 import 'package:nullability/nullability.dart';
 import 'package:riverpod/riverpod.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
@@ -375,3 +376,18 @@ EquatableValue<List<TabPreview>> filteredTabPreviews(
         .toList(),
   );
 }
+
+@Riverpod()
+class AppLinksModeNotifier extends _$AppLinksModeNotifier {
+  final _service = GeckoEngineSettingsService();
+
+  Future<void> setMode(AppLinksMode mode) async {
+    await _service.setAppLinksMode(mode);
+    ref.invalidateSelf();
+  }
+
+  @override
+  Future<AppLinksMode> build() {
+    return _service.getAppLinksMode();
+  }
+}

app/lib/features/geckoview/features/browser/domain/providers.g.dart

@@ -791,3 +791,48 @@ final class FilteredTabPreviewsFamily extends $Family
   @override
   String toString() => r'filteredTabPreviewsProvider';
 }
+
+@ProviderFor(AppLinksModeNotifier)
+final appLinksModeProvider = AppLinksModeNotifierProvider._();
+
+final class AppLinksModeNotifierProvider
+    extends $AsyncNotifierProvider<AppLinksModeNotifier, AppLinksMode> {
+  AppLinksModeNotifierProvider._()
+    : super(
+        from: null,
+        argument: null,
+        retry: null,
+        name: r'appLinksModeProvider',
+        isAutoDispose: true,
+        dependencies: null,
+        $allTransitiveDependencies: null,
+      );
+
+  @override
+  String debugGetCreateSourceHash() => _$appLinksModeNotifierHash();
+
+  @$internal
+  @override
+  AppLinksModeNotifier create() => AppLinksModeNotifier();
+}
+
+String _$appLinksModeNotifierHash() =>
+    r'2643b7d2799870fd444f7db204ea452d975368a3';
+
+abstract class _$AppLinksModeNotifier extends $AsyncNotifier<AppLinksMode> {
+  FutureOr<AppLinksMode> build();
+  @$mustCallSuper
+  @override
+  void runBuild() {
+    final ref = this.ref as $Ref<AsyncValue<AppLinksMode>, AppLinksMode>;
+    final element =
+        ref.element
+            as $ClassProviderElement<
+              AnyNotifier<AsyncValue<AppLinksMode>, AppLinksMode>,
+              AsyncValue<AppLinksMode>,
+              Object?,
+              Object?
+            >;
+    element.handleCreate(ref, build);
+  }
+}

app/lib/features/geckoview/features/browser/domain/services/engine_settings_replication.dart

@@ -30,7 +30,10 @@ import 'package:weblibre/features/user/domain/repositories/general_settings.dart
 part 'engine_settings_replication.g.dart';
 
 /// Checks if any Custom ETP setting changed between two EngineSettings instances.
-bool _customEtpSettingsChanged(GeckoEngineSettings? previous, GeckoEngineSettings current) {
+bool _customEtpSettingsChanged(
+  GeckoEngineSettings? previous,
+  GeckoEngineSettings current,
+) {
   if (previous == null) return true;
   return previous.blockCookies != current.blockCookies ||
       previous.customCookiePolicy != current.customCookiePolicy ||
@@ -39,8 +42,10 @@ bool _customEtpSettingsChanged(GeckoEngineSettings? previous, GeckoEngineSetting
       previous.blockCryptominers != current.blockCryptominers ||
       previous.blockFingerprinters != current.blockFingerprinters ||
       previous.blockRedirectTrackers != current.blockRedirectTrackers ||
-      previous.blockSuspectedFingerprinters != current.blockSuspectedFingerprinters ||
+      previous.blockSuspectedFingerprinters !=
-      previous.suspectedFingerprintersScope != current.suspectedFingerprintersScope ||
+          current.blockSuspectedFingerprinters ||
+      previous.suspectedFingerprintersScope !=
+          current.suspectedFingerprintersScope ||
       previous.allowListBaseline != current.allowListBaseline ||
       previous.allowListConvenience != current.allowListConvenience;
 }
@@ -107,14 +112,18 @@ class EngineSettingsReplicationService
               await _service.javascriptEnabled(settings.javascriptEnabled);
             }
             // Check if tracking protection policy mode changed OR any custom ETP setting changed
-            final policyModeChanged = previous.value?.trackingProtectionPolicy !=
+            final policyModeChanged =
+                previous.value?.trackingProtectionPolicy !=
                 settings.trackingProtectionPolicy;
-            final customSettingsChanged = settings.trackingProtectionPolicy == TrackingProtectionPolicy.custom &&
+            final customSettingsChanged =
+                settings.trackingProtectionPolicy ==
+                    TrackingProtectionPolicy.custom &&
                 _customEtpSettingsChanged(previous.value, settings);
 
             if (policyModeChanged || customSettingsChanged) {
               // Always send full custom settings when in CUSTOM mode
-              if (settings.trackingProtectionPolicy == TrackingProtectionPolicy.custom) {
+              if (settings.trackingProtectionPolicy ==
+                  TrackingProtectionPolicy.custom) {
                 await _service.customTrackingProtectionPolicy(
                   trackingProtectionPolicy: settings.trackingProtectionPolicy,
                   blockCookies: settings.blockCookies,
@@ -124,8 +133,10 @@ class EngineSettingsReplicationService
                   blockCryptominers: settings.blockCryptominers,
                   blockFingerprinters: settings.blockFingerprinters,
                   blockRedirectTrackers: settings.blockRedirectTrackers,
-                  blockSuspectedFingerprinters: settings.blockSuspectedFingerprinters,
+                  blockSuspectedFingerprinters:
-                  suspectedFingerprintersScope: settings.suspectedFingerprintersScope,
+                      settings.blockSuspectedFingerprinters,
+                  suspectedFingerprintersScope:
+                      settings.suspectedFingerprintersScope,
                   allowListBaseline: settings.allowListBaseline,
                   allowListConvenience: settings.allowListConvenience,
                 );

app/lib/features/geckoview/features/browser/domain/services/engine_settings_replication.g.dart

@@ -44,7 +44,7 @@ final class EngineSettingsReplicationServiceProvider
 }
 
 String _$engineSettingsReplicationServiceHash() =>
-    r'0a9539e19946028f525de64ed5f33e2483e7abc2';
+    r'3e06f0c273090f9f9dfc42f2140d60ef9557f176';
 
 abstract class _$EngineSettingsReplicationService extends $Notifier<void> {
   void build();

app/lib/features/geckoview/features/browser/presentation/providers/site_settings_badge_provider.g.dart

@@ -48,4 +48,4 @@ final class ShowSiteSettingsBadgeProvider
 }
 
 String _$showSiteSettingsBadgeHash() =>
-    r'8b759a67e5c8b0f49a5d38b793a3357576a2eb87';
+    r'e326617d2d794844c6bbe6d909042b91d95c2996';

app/lib/features/settings/presentation/screens/tabs_behavior_settings.dart

@@ -20,9 +20,11 @@
 import 'package:fading_scroll/fading_scroll.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_material_design_icons/flutter_material_design_icons.dart';
+import 'package:flutter_mozilla_components/flutter_mozilla_components.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:weblibre/core/design/app_colors.dart';
 import 'package:weblibre/core/routing/routes.dart';
+import 'package:weblibre/features/geckoview/features/browser/domain/providers.dart';
 import 'package:weblibre/features/settings/presentation/controllers/save_settings.dart';
 import 'package:weblibre/features/settings/presentation/widgets/sections.dart';
 import 'package:weblibre/features/user/data/models/general_settings.dart';
@@ -65,6 +67,7 @@ class _TabCreationSection extends StatelessWidget {
         SettingSection(name: 'Tab Creation'),
         _NewTabDefaultSection(),
         _ExternalLinkHandlingSection(),
+        _AppLinksModeSection(),
       ],
     );
   }
@@ -340,3 +343,63 @@ class _TabBarSwipeBehaviorSection extends HookConsumerWidget {
     );
   }
 }
+
+class _AppLinksModeSection extends HookConsumerWidget {
+  const _AppLinksModeSection();
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final appLinksMode = ref.watch(
+      appLinksModeProvider.select((value) => value.value),
+    );
+
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8),
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          const ListTile(
+            title: Text('Open Links in Apps'),
+            subtitle: Text(
+              'Choose how links that can be opened in other apps are handled',
+            ),
+            leading: Icon(MdiIcons.openInApp),
+            contentPadding: EdgeInsets.zero,
+          ),
+          RadioGroup(
+            groupValue: appLinksMode,
+            onChanged: (value) async {
+              if (value != null) {
+                await ref.read(appLinksModeProvider.notifier).setMode(value);
+              }
+            },
+            child: const Column(
+              children: [
+                RadioListTile.adaptive(
+                  value: AppLinksMode.always,
+                  title: Text('Always'),
+                  subtitle: Text(
+                    'Always open links in their native apps without asking',
+                  ),
+                ),
+                RadioListTile.adaptive(
+                  value: AppLinksMode.ask,
+                  title: Text('Ask before opening'),
+                  subtitle: Text('Show a prompt before opening links in apps'),
+                ),
+                RadioListTile.adaptive(
+                  value: AppLinksMode.never,
+                  title: Text('Never'),
+                  subtitle: Text(
+                    'Always open links in the browser instead of apps',
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/BaseBrowserFragment.kt

@@ -19,7 +19,9 @@ import android.widget.FrameLayout
 import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.annotation.CallSuper
+import androidx.core.content.edit
 import androidx.fragment.app.Fragment
+import androidx.preference.PreferenceManager
 import eu.weblibre.flutter_mozilla_components.addons.WebExtensionActionPopupActivity
 import eu.weblibre.flutter_mozilla_components.addons.WebExtensionPromptFeature
 import eu.weblibre.flutter_mozilla_components.databinding.FragmentBrowserBinding
@@ -297,8 +299,13 @@ abstract class BaseBrowserFragment : Fragment(), UserInteractionHandler, Activit
                     sessionId = sessionId,
                     fragmentManager = parentFragmentManager,
                     loadUrlUseCase = components.useCases.sessionUseCases.loadUrl,
-                    launchInApp = { true },
+                    launchInApp = { GlobalComponents.shouldOpenLinksInApp() },
-                    shouldPrompt = { true },
+                    shouldPrompt = { GlobalComponents.shouldPromptOpenLinksInApp() },
+                    alwaysOpenCheckboxAction = {
+                        GlobalComponents.engineSettingsApi?.setAppLinksMode(
+                            eu.weblibre.flutter_mozilla_components.pigeons.AppLinksMode.ALWAYS
+                        )
+                    },
                     failedToLaunchAction = { fallbackUrl ->
                         fallbackUrl?.let {
                             val appLinksUseCases = components.useCases.appLinksUseCases

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/GlobalComponents.kt

@@ -17,6 +17,7 @@ import eu.weblibre.flutter_mozilla_components.pigeons.GeckoTabContentEvents
 import eu.weblibre.flutter_mozilla_components.pigeons.GeckoViewportEvents
 import eu.weblibre.flutter_mozilla_components.pigeons.ReaderViewController
 import eu.weblibre.flutter_mozilla_components.api.GeckoViewportApiImpl
+import eu.weblibre.flutter_mozilla_components.api.GeckoEngineSettingsApiImpl
 import kotlinx.coroutines.DelicateCoroutinesApi
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
@@ -53,6 +54,25 @@ object GlobalComponents {
     // Viewport API for applying pending settings when engineView becomes available
     var viewportApi: GeckoViewportApiImpl? = null
 
+    // Engine settings API for managing engine-specific settings
+    var engineSettingsApi: GeckoEngineSettingsApiImpl? = null
+
+    fun shouldOpenLinksInApp(): Boolean {
+        return when (engineSettingsApi!!.getAppLinksMode()) {
+            eu.weblibre.flutter_mozilla_components.pigeons.AppLinksMode.ALWAYS -> true
+            eu.weblibre.flutter_mozilla_components.pigeons.AppLinksMode.ASK -> true
+            eu.weblibre.flutter_mozilla_components.pigeons.AppLinksMode.NEVER -> false
+        }
+    }
+
+    fun shouldPromptOpenLinksInApp(): Boolean {
+        return when (engineSettingsApi!!.getAppLinksMode()) {
+            eu.weblibre.flutter_mozilla_components.pigeons.AppLinksMode.ALWAYS -> false
+            eu.weblibre.flutter_mozilla_components.pigeons.AppLinksMode.ASK -> true
+            eu.weblibre.flutter_mozilla_components.pigeons.AppLinksMode.NEVER -> false
+        }
+    }
+
     @DelicateCoroutinesApi
     private fun restoreBrowserState(newComponents: Components) =
         GlobalScope.launch(Dispatchers.Main) {

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/api/GeckoBrowserApiImpl.kt

@@ -231,10 +231,12 @@ class GeckoBrowserApiImpl : GeckoBrowserApi {
             addonCollection
         )
 
+        val engineSettingsApiImpl = GeckoEngineSettingsApiImpl()
         GeckoEngineSettingsApi.setUp(
             _flutterPluginBinding.binaryMessenger,
-            GeckoEngineSettingsApiImpl()
+            engineSettingsApiImpl
         )
+        GlobalComponents.engineSettingsApi = engineSettingsApiImpl
         GeckoAddonsApi.setUp(
             _flutterPluginBinding.binaryMessenger,
             GeckoAddonsApiImpl(profileApplicationContext)

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/api/GeckoEngineSettingsApiImpl.kt

@@ -6,7 +6,11 @@
 
 package eu.weblibre.flutter_mozilla_components.api
 
+import androidx.core.content.edit
+import androidx.preference.PreferenceManager
 import eu.weblibre.flutter_mozilla_components.GlobalComponents
+import eu.weblibre.flutter_mozilla_components.R
+import eu.weblibre.flutter_mozilla_components.pigeons.AppLinksMode
 import eu.weblibre.flutter_mozilla_components.pigeons.ColorScheme
 import eu.weblibre.flutter_mozilla_components.pigeons.CookieBannerHandlingMode
 import eu.weblibre.flutter_mozilla_components.pigeons.CustomCookiePolicy
@@ -317,4 +321,33 @@ class GeckoEngineSettingsApiImpl : GeckoEngineSettingsApi {
     override fun setPullToRefreshEnabled(enabled: Boolean) {
         GlobalComponents.pullToRefreshEnabled = enabled
     }
+
+    override fun setAppLinksMode(mode: AppLinksMode) {
+        val context = components.profileApplicationContext
+        val prefKey = context.getString(R.string.pref_key_open_links_in_apps)
+        val modeValue = when (mode) {
+            AppLinksMode.ALWAYS -> context.getString(R.string.pref_key_open_links_in_apps_always)
+            AppLinksMode.ASK -> context.getString(R.string.pref_key_open_links_in_apps_ask)
+            AppLinksMode.NEVER -> context.getString(R.string.pref_key_open_links_in_apps_never)
+        }
+
+        PreferenceManager.getDefaultSharedPreferences(context).edit {
+            putString(prefKey, modeValue)
+        }
+    }
+
+    override fun getAppLinksMode(): AppLinksMode {
+        val context = components.profileApplicationContext
+        val prefKey = context.getString(R.string.pref_key_open_links_in_apps)
+        val defaultValue = context.getString(R.string.pref_key_open_links_in_apps_ask)
+        val modeValue = PreferenceManager.getDefaultSharedPreferences(context)
+            .getString(prefKey, defaultValue) ?: defaultValue
+
+        return when (modeValue) {
+            context.getString(R.string.pref_key_open_links_in_apps_always) -> AppLinksMode.ALWAYS
+            context.getString(R.string.pref_key_open_links_in_apps_ask) -> AppLinksMode.ASK
+            context.getString(R.string.pref_key_open_links_in_apps_never) -> AppLinksMode.NEVER
+            else -> AppLinksMode.ASK
+        }
+    }
 }

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/components/Services.kt

@@ -6,6 +6,7 @@ package eu.weblibre.flutter_mozilla_components.components
 
 import android.content.Context
 import androidx.preference.PreferenceManager
+import eu.weblibre.flutter_mozilla_components.GlobalComponents
 import eu.weblibre.flutter_mozilla_components.R
 import eu.weblibre.flutter_mozilla_components.ext.getPreferenceKey
 import mozilla.components.browser.state.store.BrowserStore
@@ -25,7 +26,7 @@ class Services(
     val appLinksInterceptor by lazy {
         AppLinksInterceptor(
             context = context,
-            launchInApp = { true },
+            launchInApp = { GlobalComponents.shouldOpenLinksInApp() },
             store = store,
         )
     }

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/pigeons/Gecko.g.kt

@@ -322,6 +322,22 @@ enum class CookieBannerHandlingMode(val raw: Int) {
   }
 }
 
+/** App links behavior mode - controls how external app links are handled */
+enum class AppLinksMode(val raw: Int) {
+  /** Always open links in their native apps without prompting */
+  ALWAYS(0),
+  /** Prompt user before opening in app (with "Always open" checkbox) */
+  ASK(1),
+  /** Never open links in external apps, always use browser */
+  NEVER(2);
+
+  companion object {
+    fun ofRaw(raw: Int): AppLinksMode? {
+      return values().firstOrNull { it.raw == raw }
+    }
+  }
+}
+
 enum class WebContentIsolationStrategy(val raw: Int) {
   ISOLATE_NOTHING(0),
   ISOLATE_EVERYTHING(1),
@@ -3036,345 +3052,350 @@ private open class GeckoPigeonCodec : StandardMessageCodec() {
       }
       144.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          WebContentIsolationStrategy.ofRaw(it.toInt())
+          AppLinksMode.ofRaw(it.toInt())
         }
       }
       145.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          CustomCookiePolicy.ofRaw(it.toInt())
+          WebContentIsolationStrategy.ofRaw(it.toInt())
         }
       }
       146.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          TrackingScope.ofRaw(it.toInt())
+          CustomCookiePolicy.ofRaw(it.toInt())
         }
       }
       147.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          DohSettingsMode.ofRaw(it.toInt())
+          TrackingScope.ofRaw(it.toInt())
         }
       }
       148.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          DownloadStatus.ofRaw(it.toInt())
+          DohSettingsMode.ofRaw(it.toInt())
         }
       }
       149.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          LogLevel.ofRaw(it.toInt())
+          DownloadStatus.ofRaw(it.toInt())
         }
       }
       150.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          MlProgressType.ofRaw(it.toInt())
+          LogLevel.ofRaw(it.toInt())
         }
       }
       151.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          MlProgressStatus.ofRaw(it.toInt())
+          MlProgressType.ofRaw(it.toInt())
         }
       }
       152.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          ClearDataType.ofRaw(it.toInt())
+          MlProgressStatus.ofRaw(it.toInt())
         }
       }
       153.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          GeckoFetchMethod.ofRaw(it.toInt())
+          ClearDataType.ofRaw(it.toInt())
         }
       }
       154.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          GeckoFetchRedircet.ofRaw(it.toInt())
+          GeckoFetchMethod.ofRaw(it.toInt())
         }
       }
       155.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          GeckoFetchCookiePolicy.ofRaw(it.toInt())
+          GeckoFetchRedircet.ofRaw(it.toInt())
         }
       }
       156.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          BookmarkNodeType.ofRaw(it.toInt())
+          GeckoFetchCookiePolicy.ofRaw(it.toInt())
         }
       }
       157.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          SitePermissionStatus.ofRaw(it.toInt())
+          BookmarkNodeType.ofRaw(it.toInt())
         }
       }
       158.toByte() -> {
         return (readValue(buffer) as Long?)?.let {
-          AutoplayStatus.ofRaw(it.toInt())
+          SitePermissionStatus.ofRaw(it.toInt())
         }
       }
       159.toByte() -> {
-        return (readValue(buffer) as? List<Any?>)?.let {
+        return (readValue(buffer) as Long?)?.let {
-          TranslationOptions.fromList(it)
+          AutoplayStatus.ofRaw(it.toInt())
         }
       }
       160.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          ReaderState.fromList(it)
+          TranslationOptions.fromList(it)
         }
       }
       161.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          AddTabParams.fromList(it)
+          ReaderState.fromList(it)
         }
       }
       162.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          LastMediaAccessState.fromList(it)
+          AddTabParams.fromList(it)
         }
       }
       163.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          HistoryMetadataKey.fromList(it)
+          LastMediaAccessState.fromList(it)
         }
       }
       164.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          PackageCategoryValue.fromList(it)
+          HistoryMetadataKey.fromList(it)
         }
       }
       165.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          ExternalPackage.fromList(it)
+          PackageCategoryValue.fromList(it)
         }
       }
       166.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          LoadUrlFlagsValue.fromList(it)
+          ExternalPackage.fromList(it)
         }
       }
       167.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          SourceValue.fromList(it)
+          LoadUrlFlagsValue.fromList(it)
         }
       }
       168.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          TabState.fromList(it)
+          SourceValue.fromList(it)
         }
       }
       169.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          RecoverableTab.fromList(it)
+          TabState.fromList(it)
         }
       }
       170.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          RecoverableBrowserState.fromList(it)
+          RecoverableTab.fromList(it)
         }
       }
       171.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          IconRequest.fromList(it)
+          RecoverableBrowserState.fromList(it)
         }
       }
       172.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          ResourceSize.fromList(it)
+          IconRequest.fromList(it)
         }
       }
       173.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          Resource.fromList(it)
+          ResourceSize.fromList(it)
         }
       }
       174.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          IconResult.fromList(it)
+          Resource.fromList(it)
         }
       }
       175.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          CookiePartitionKey.fromList(it)
+          IconResult.fromList(it)
         }
       }
       176.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          Cookie.fromList(it)
+          CookiePartitionKey.fromList(it)
         }
       }
       177.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          VisitInfo.fromList(it)
+          Cookie.fromList(it)
         }
       }
       178.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          HistoryItem.fromList(it)
+          VisitInfo.fromList(it)
         }
       }
       179.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          HistoryState.fromList(it)
+          HistoryItem.fromList(it)
         }
       }
       180.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          ReaderableState.fromList(it)
+          HistoryState.fromList(it)
         }
       }
       181.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          SecurityInfoState.fromList(it)
+          ReaderableState.fromList(it)
         }
       }
       182.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          TabContentState.fromList(it)
+          SecurityInfoState.fromList(it)
         }
       }
       183.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          FindResultState.fromList(it)
+          TabContentState.fromList(it)
         }
       }
       184.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          CustomSelectionAction.fromList(it)
+          FindResultState.fromList(it)
         }
       }
       185.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          WebExtensionData.fromList(it)
+          CustomSelectionAction.fromList(it)
         }
       }
       186.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          GeckoSuggestion.fromList(it)
+          WebExtensionData.fromList(it)
         }
       }
       187.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          TabContent.fromList(it)
+          GeckoSuggestion.fromList(it)
         }
       }
       188.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          ContentBlocking.fromList(it)
+          TabContent.fromList(it)
         }
       }
       189.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          DohSettings.fromList(it)
+          ContentBlocking.fromList(it)
         }
       }
       190.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          GeckoEngineSettings.fromList(it)
+          DohSettings.fromList(it)
         }
       }
       191.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          AutocompleteResult.fromList(it)
+          GeckoEngineSettings.fromList(it)
         }
       }
       192.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          UnknownHitResult.fromList(it)
+          AutocompleteResult.fromList(it)
         }
       }
       193.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          ImageHitResult.fromList(it)
+          UnknownHitResult.fromList(it)
         }
       }
       194.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          VideoHitResult.fromList(it)
+          ImageHitResult.fromList(it)
         }
       }
       195.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          AudioHitResult.fromList(it)
+          VideoHitResult.fromList(it)
         }
       }
       196.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          ImageSrcHitResult.fromList(it)
+          AudioHitResult.fromList(it)
         }
       }
       197.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          PhoneHitResult.fromList(it)
+          ImageSrcHitResult.fromList(it)
         }
       }
       198.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          EmailHitResult.fromList(it)
+          PhoneHitResult.fromList(it)
         }
       }
       199.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          GeoHitResult.fromList(it)
+          EmailHitResult.fromList(it)
         }
       }
       200.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          DownloadState.fromList(it)
+          GeoHitResult.fromList(it)
         }
       }
       201.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          ShareInternetResourceState.fromList(it)
+          DownloadState.fromList(it)
         }
       }
       202.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          AddonCollection.fromList(it)
+          ShareInternetResourceState.fromList(it)
         }
       }
       203.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          GeckoPref.fromList(it)
+          AddonCollection.fromList(it)
         }
       }
       204.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          MlProgressData.fromList(it)
+          GeckoPref.fromList(it)
         }
       }
       205.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          ContainerSiteAssignment.fromList(it)
+          MlProgressData.fromList(it)
         }
       }
       206.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          GeckoHeader.fromList(it)
+          ContainerSiteAssignment.fromList(it)
         }
       }
       207.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          GeckoFetchRequest.fromList(it)
+          GeckoHeader.fromList(it)
         }
       }
       208.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          GeckoFetchResponse.fromList(it)
+          GeckoFetchRequest.fromList(it)
         }
       }
       209.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          BookmarkNode.fromList(it)
+          GeckoFetchResponse.fromList(it)
         }
       }
       210.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          BookmarkInfo.fromList(it)
+          BookmarkNode.fromList(it)
         }
       }
       211.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
-          SitePermissions.fromList(it)
+          BookmarkInfo.fromList(it)
         }
       }
       212.toByte() -> {
+        return (readValue(buffer) as? List<Any?>)?.let {
+          SitePermissions.fromList(it)
+        }
+      }
+      213.toByte() -> {
         return (readValue(buffer) as? List<Any?>)?.let {
           TrackingProtectionException.fromList(it)
         }
@@ -3444,282 +3465,286 @@ private open class GeckoPigeonCodec : StandardMessageCodec() {
         stream.write(143)
         writeValue(stream, value.raw.toLong())
       }
-      is WebContentIsolationStrategy -> {
+      is AppLinksMode -> {
         stream.write(144)
         writeValue(stream, value.raw.toLong())
       }
-      is CustomCookiePolicy -> {
+      is WebContentIsolationStrategy -> {
         stream.write(145)
         writeValue(stream, value.raw.toLong())
       }
-      is TrackingScope -> {
+      is CustomCookiePolicy -> {
         stream.write(146)
         writeValue(stream, value.raw.toLong())
       }
-      is DohSettingsMode -> {
+      is TrackingScope -> {
         stream.write(147)
         writeValue(stream, value.raw.toLong())
       }
-      is DownloadStatus -> {
+      is DohSettingsMode -> {
         stream.write(148)
         writeValue(stream, value.raw.toLong())
       }
-      is LogLevel -> {
+      is DownloadStatus -> {
         stream.write(149)
         writeValue(stream, value.raw.toLong())
       }
-      is MlProgressType -> {
+      is LogLevel -> {
         stream.write(150)
         writeValue(stream, value.raw.toLong())
       }
-      is MlProgressStatus -> {
+      is MlProgressType -> {
         stream.write(151)
         writeValue(stream, value.raw.toLong())
       }
-      is ClearDataType -> {
+      is MlProgressStatus -> {
         stream.write(152)
         writeValue(stream, value.raw.toLong())
       }
-      is GeckoFetchMethod -> {
+      is ClearDataType -> {
         stream.write(153)
         writeValue(stream, value.raw.toLong())
       }
-      is GeckoFetchRedircet -> {
+      is GeckoFetchMethod -> {
         stream.write(154)
         writeValue(stream, value.raw.toLong())
       }
-      is GeckoFetchCookiePolicy -> {
+      is GeckoFetchRedircet -> {
         stream.write(155)
         writeValue(stream, value.raw.toLong())
       }
-      is BookmarkNodeType -> {
+      is GeckoFetchCookiePolicy -> {
         stream.write(156)
         writeValue(stream, value.raw.toLong())
       }
-      is SitePermissionStatus -> {
+      is BookmarkNodeType -> {
         stream.write(157)
         writeValue(stream, value.raw.toLong())
       }
-      is AutoplayStatus -> {
+      is SitePermissionStatus -> {
         stream.write(158)
         writeValue(stream, value.raw.toLong())
       }
-      is TranslationOptions -> {
+      is AutoplayStatus -> {
         stream.write(159)
-        writeValue(stream, value.toList())
+        writeValue(stream, value.raw.toLong())
       }
-      is ReaderState -> {
+      is TranslationOptions -> {
         stream.write(160)
         writeValue(stream, value.toList())
       }
-      is AddTabParams -> {
+      is ReaderState -> {
         stream.write(161)
         writeValue(stream, value.toList())
       }
-      is LastMediaAccessState -> {
+      is AddTabParams -> {
         stream.write(162)
         writeValue(stream, value.toList())
       }
-      is HistoryMetadataKey -> {
+      is LastMediaAccessState -> {
         stream.write(163)
         writeValue(stream, value.toList())
       }
-      is PackageCategoryValue -> {
+      is HistoryMetadataKey -> {
         stream.write(164)
         writeValue(stream, value.toList())
       }
-      is ExternalPackage -> {
+      is PackageCategoryValue -> {
         stream.write(165)
         writeValue(stream, value.toList())
       }
-      is LoadUrlFlagsValue -> {
+      is ExternalPackage -> {
         stream.write(166)
         writeValue(stream, value.toList())
       }
-      is SourceValue -> {
+      is LoadUrlFlagsValue -> {
         stream.write(167)
         writeValue(stream, value.toList())
       }
-      is TabState -> {
+      is SourceValue -> {
         stream.write(168)
         writeValue(stream, value.toList())
       }
-      is RecoverableTab -> {
+      is TabState -> {
         stream.write(169)
         writeValue(stream, value.toList())
       }
-      is RecoverableBrowserState -> {
+      is RecoverableTab -> {
         stream.write(170)
         writeValue(stream, value.toList())
       }
-      is IconRequest -> {
+      is RecoverableBrowserState -> {
         stream.write(171)
         writeValue(stream, value.toList())
       }
-      is ResourceSize -> {
+      is IconRequest -> {
         stream.write(172)
         writeValue(stream, value.toList())
       }
-      is Resource -> {
+      is ResourceSize -> {
         stream.write(173)
         writeValue(stream, value.toList())
       }
-      is IconResult -> {
+      is Resource -> {
         stream.write(174)
         writeValue(stream, value.toList())
       }
-      is CookiePartitionKey -> {
+      is IconResult -> {
         stream.write(175)
         writeValue(stream, value.toList())
       }
-      is Cookie -> {
+      is CookiePartitionKey -> {
         stream.write(176)
         writeValue(stream, value.toList())
       }
-      is VisitInfo -> {
+      is Cookie -> {
         stream.write(177)
         writeValue(stream, value.toList())
       }
-      is HistoryItem -> {
+      is VisitInfo -> {
         stream.write(178)
         writeValue(stream, value.toList())
       }
-      is HistoryState -> {
+      is HistoryItem -> {
         stream.write(179)
         writeValue(stream, value.toList())
       }
-      is ReaderableState -> {
+      is HistoryState -> {
         stream.write(180)
         writeValue(stream, value.toList())
       }
-      is SecurityInfoState -> {
+      is ReaderableState -> {
         stream.write(181)
         writeValue(stream, value.toList())
       }
-      is TabContentState -> {
+      is SecurityInfoState -> {
         stream.write(182)
         writeValue(stream, value.toList())
       }
-      is FindResultState -> {
+      is TabContentState -> {
         stream.write(183)
         writeValue(stream, value.toList())
       }
-      is CustomSelectionAction -> {
+      is FindResultState -> {
         stream.write(184)
         writeValue(stream, value.toList())
       }
-      is WebExtensionData -> {
+      is CustomSelectionAction -> {
         stream.write(185)
         writeValue(stream, value.toList())
       }
-      is GeckoSuggestion -> {
+      is WebExtensionData -> {
         stream.write(186)
         writeValue(stream, value.toList())
       }
-      is TabContent -> {
+      is GeckoSuggestion -> {
         stream.write(187)
         writeValue(stream, value.toList())
       }
-      is ContentBlocking -> {
+      is TabContent -> {
         stream.write(188)
         writeValue(stream, value.toList())
       }
-      is DohSettings -> {
+      is ContentBlocking -> {
         stream.write(189)
         writeValue(stream, value.toList())
       }
-      is GeckoEngineSettings -> {
+      is DohSettings -> {
         stream.write(190)
         writeValue(stream, value.toList())
       }
-      is AutocompleteResult -> {
+      is GeckoEngineSettings -> {
         stream.write(191)
         writeValue(stream, value.toList())
       }
-      is UnknownHitResult -> {
+      is AutocompleteResult -> {
         stream.write(192)
         writeValue(stream, value.toList())
       }
-      is ImageHitResult -> {
+      is UnknownHitResult -> {
         stream.write(193)
         writeValue(stream, value.toList())
       }
-      is VideoHitResult -> {
+      is ImageHitResult -> {
         stream.write(194)
         writeValue(stream, value.toList())
       }
-      is AudioHitResult -> {
+      is VideoHitResult -> {
         stream.write(195)
         writeValue(stream, value.toList())
       }
-      is ImageSrcHitResult -> {
+      is AudioHitResult -> {
         stream.write(196)
         writeValue(stream, value.toList())
       }
-      is PhoneHitResult -> {
+      is ImageSrcHitResult -> {
         stream.write(197)
         writeValue(stream, value.toList())
       }
-      is EmailHitResult -> {
+      is PhoneHitResult -> {
         stream.write(198)
         writeValue(stream, value.toList())
       }
-      is GeoHitResult -> {
+      is EmailHitResult -> {
         stream.write(199)
         writeValue(stream, value.toList())
       }
-      is DownloadState -> {
+      is GeoHitResult -> {
         stream.write(200)
         writeValue(stream, value.toList())
       }
-      is ShareInternetResourceState -> {
+      is DownloadState -> {
         stream.write(201)
         writeValue(stream, value.toList())
       }
-      is AddonCollection -> {
+      is ShareInternetResourceState -> {
         stream.write(202)
         writeValue(stream, value.toList())
       }
-      is GeckoPref -> {
+      is AddonCollection -> {
         stream.write(203)
         writeValue(stream, value.toList())
       }
-      is MlProgressData -> {
+      is GeckoPref -> {
         stream.write(204)
         writeValue(stream, value.toList())
       }
-      is ContainerSiteAssignment -> {
+      is MlProgressData -> {
         stream.write(205)
         writeValue(stream, value.toList())
       }
-      is GeckoHeader -> {
+      is ContainerSiteAssignment -> {
         stream.write(206)
         writeValue(stream, value.toList())
       }
-      is GeckoFetchRequest -> {
+      is GeckoHeader -> {
         stream.write(207)
         writeValue(stream, value.toList())
       }
-      is GeckoFetchResponse -> {
+      is GeckoFetchRequest -> {
         stream.write(208)
         writeValue(stream, value.toList())
       }
-      is BookmarkNode -> {
+      is GeckoFetchResponse -> {
         stream.write(209)
         writeValue(stream, value.toList())
       }
-      is BookmarkInfo -> {
+      is BookmarkNode -> {
         stream.write(210)
         writeValue(stream, value.toList())
       }
-      is SitePermissions -> {
+      is BookmarkInfo -> {
         stream.write(211)
         writeValue(stream, value.toList())
       }
-      is TrackingProtectionException -> {
+      is SitePermissions -> {
         stream.write(212)
         writeValue(stream, value.toList())
       }
+      is TrackingProtectionException -> {
+        stream.write(213)
+        writeValue(stream, value.toList())
+      }
       else -> super.writeValue(stream, value)
     }
   }
@@ -3819,6 +3844,12 @@ interface GeckoEngineSettingsApi {
   fun setDefaultSettings(settings: GeckoEngineSettings)
   fun updateRuntimeSettings(settings: GeckoEngineSettings)
   fun setPullToRefreshEnabled(enabled: Boolean)
+  /**
+   * Sets the app links mode preference (stored in SharedPreferences).
+   * Controls how external app links are handled in the browser.
+   */
+  fun setAppLinksMode(mode: AppLinksMode)
+  fun getAppLinksMode(): AppLinksMode
 
   companion object {
     /** The codec used by GeckoEngineSettingsApi. */
@@ -3883,6 +3914,39 @@ interface GeckoEngineSettingsApi {
           channel.setMessageHandler(null)
         }
       }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.flutter_mozilla_components.GeckoEngineSettingsApi.setAppLinksMode$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { message, reply ->
+            val args = message as List<Any?>
+            val modeArg = args[0] as AppLinksMode
+            val wrapped: List<Any?> = try {
+              api.setAppLinksMode(modeArg)
+              listOf(null)
+            } catch (exception: Throwable) {
+              GeckoPigeonUtils.wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
+      run {
+        val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.flutter_mozilla_components.GeckoEngineSettingsApi.getAppLinksMode$separatedMessageChannelSuffix", codec)
+        if (api != null) {
+          channel.setMessageHandler { _, reply ->
+            val wrapped: List<Any?> = try {
+              listOf(api.getAppLinksMode())
+            } catch (exception: Throwable) {
+              GeckoPigeonUtils.wrapError(exception)
+            }
+            reply.reply(wrapped)
+          }
+        } else {
+          channel.setMessageHandler(null)
+        }
+      }
     }
   }
 }

packages/flutter_mozilla_components/android/src/main/res/values/preference_keys.xml

@@ -28,4 +28,10 @@
     <string name="pref_key_override_amo_collection" translatable="false">pref_key_override_amo_collection</string>
     <string name="pref_key_override_amo_user" translatable="false">pref_key_override_amo_user</string>
     <string name="pref_key_compose_ui" translatable="false">pref_key_compose_ui</string>
+
+    <!-- App Links Settings -->
+    <string name="pref_key_open_links_in_apps" translatable="false">pref_key_open_links_in_apps</string>
+    <string name="pref_key_open_links_in_apps_always" translatable="false">pref_key_open_links_in_apps_always</string>
+    <string name="pref_key_open_links_in_apps_ask" translatable="false">pref_key_open_links_in_apps_ask</string>
+    <string name="pref_key_open_links_in_apps_never" translatable="false">pref_key_open_links_in_apps_never</string>
 </resources>

packages/flutter_mozilla_components/lib/flutter_mozilla_components.dart

@@ -36,6 +36,7 @@ export 'src/pigeons/gecko.g.dart'
     show
         AddTabParams,
         AddonCollection,
+        AppLinksMode,
         AudioHitResult,
         AutoplayStatus,
         BookmarkInfo,

packages/flutter_mozilla_components/lib/src/domain/services/gecko_engine_settings.dart

@@ -138,4 +138,14 @@ class GeckoEngineSettingsService {
   Future<void> setPullToRefreshEnabled(bool enabled) {
     return _api.setPullToRefreshEnabled(enabled);
   }
+
+  /// Sets the app links mode preference.
+  /// Controls how external app links are handled in browser.
+  Future<void> setAppLinksMode(AppLinksMode mode) {
+    return _api.setAppLinksMode(mode);
+  }
+
+  Future<AppLinksMode> getAppLinksMode() {
+    return _api.getAppLinksMode();
+  }
 }

packages/flutter_mozilla_components/lib/src/pigeons/gecko.g.dart

@@ -180,6 +180,16 @@ enum CookieBannerHandlingMode {
   rejectOrAcceptAll,
 }
 
+/// App links behavior mode - controls how external app links are handled
+enum AppLinksMode {
+  /// Always open links in their native apps without prompting
+  always,
+  /// Prompt user before opening in app (with "Always open" checkbox)
+  ask,
+  /// Never open links in external apps, always use browser
+  never,
+}
+
 enum WebContentIsolationStrategy {
   isolateNothing,
   isolateEverything,
@@ -3805,213 +3815,216 @@ class _PigeonCodec extends StandardMessageCodec {
     }    else if (value is CookieBannerHandlingMode) {
       buffer.putUint8(143);
       writeValue(buffer, value.index);
-    }    else if (value is WebContentIsolationStrategy) {
+    }    else if (value is AppLinksMode) {
       buffer.putUint8(144);
       writeValue(buffer, value.index);
-    }    else if (value is CustomCookiePolicy) {
+    }    else if (value is WebContentIsolationStrategy) {
       buffer.putUint8(145);
       writeValue(buffer, value.index);
-    }    else if (value is TrackingScope) {
+    }    else if (value is CustomCookiePolicy) {
       buffer.putUint8(146);
       writeValue(buffer, value.index);
-    }    else if (value is DohSettingsMode) {
+    }    else if (value is TrackingScope) {
       buffer.putUint8(147);
       writeValue(buffer, value.index);
-    }    else if (value is DownloadStatus) {
+    }    else if (value is DohSettingsMode) {
       buffer.putUint8(148);
       writeValue(buffer, value.index);
-    }    else if (value is LogLevel) {
+    }    else if (value is DownloadStatus) {
       buffer.putUint8(149);
       writeValue(buffer, value.index);
-    }    else if (value is MlProgressType) {
+    }    else if (value is LogLevel) {
       buffer.putUint8(150);
       writeValue(buffer, value.index);
-    }    else if (value is MlProgressStatus) {
+    }    else if (value is MlProgressType) {
       buffer.putUint8(151);
       writeValue(buffer, value.index);
-    }    else if (value is ClearDataType) {
+    }    else if (value is MlProgressStatus) {
       buffer.putUint8(152);
       writeValue(buffer, value.index);
-    }    else if (value is GeckoFetchMethod) {
+    }    else if (value is ClearDataType) {
       buffer.putUint8(153);
       writeValue(buffer, value.index);
-    }    else if (value is GeckoFetchRedircet) {
+    }    else if (value is GeckoFetchMethod) {
       buffer.putUint8(154);
       writeValue(buffer, value.index);
-    }    else if (value is GeckoFetchCookiePolicy) {
+    }    else if (value is GeckoFetchRedircet) {
       buffer.putUint8(155);
       writeValue(buffer, value.index);
-    }    else if (value is BookmarkNodeType) {
+    }    else if (value is GeckoFetchCookiePolicy) {
       buffer.putUint8(156);
       writeValue(buffer, value.index);
-    }    else if (value is SitePermissionStatus) {
+    }    else if (value is BookmarkNodeType) {
       buffer.putUint8(157);
       writeValue(buffer, value.index);
-    }    else if (value is AutoplayStatus) {
+    }    else if (value is SitePermissionStatus) {
       buffer.putUint8(158);
       writeValue(buffer, value.index);
-    }    else if (value is TranslationOptions) {
+    }    else if (value is AutoplayStatus) {
       buffer.putUint8(159);
-      writeValue(buffer, value.encode());
+      writeValue(buffer, value.index);
-    }    else if (value is ReaderState) {
+    }    else if (value is TranslationOptions) {
       buffer.putUint8(160);
       writeValue(buffer, value.encode());
-    }    else if (value is AddTabParams) {
+    }    else if (value is ReaderState) {
       buffer.putUint8(161);
       writeValue(buffer, value.encode());
-    }    else if (value is LastMediaAccessState) {
+    }    else if (value is AddTabParams) {
       buffer.putUint8(162);
       writeValue(buffer, value.encode());
-    }    else if (value is HistoryMetadataKey) {
+    }    else if (value is LastMediaAccessState) {
       buffer.putUint8(163);
       writeValue(buffer, value.encode());
-    }    else if (value is PackageCategoryValue) {
+    }    else if (value is HistoryMetadataKey) {
       buffer.putUint8(164);
       writeValue(buffer, value.encode());
-    }    else if (value is ExternalPackage) {
+    }    else if (value is PackageCategoryValue) {
       buffer.putUint8(165);
       writeValue(buffer, value.encode());
-    }    else if (value is LoadUrlFlagsValue) {
+    }    else if (value is ExternalPackage) {
       buffer.putUint8(166);
       writeValue(buffer, value.encode());
-    }    else if (value is SourceValue) {
+    }    else if (value is LoadUrlFlagsValue) {
       buffer.putUint8(167);
       writeValue(buffer, value.encode());
-    }    else if (value is TabState) {
+    }    else if (value is SourceValue) {
       buffer.putUint8(168);
       writeValue(buffer, value.encode());
-    }    else if (value is RecoverableTab) {
+    }    else if (value is TabState) {
       buffer.putUint8(169);
       writeValue(buffer, value.encode());
-    }    else if (value is RecoverableBrowserState) {
+    }    else if (value is RecoverableTab) {
       buffer.putUint8(170);
       writeValue(buffer, value.encode());
-    }    else if (value is IconRequest) {
+    }    else if (value is RecoverableBrowserState) {
       buffer.putUint8(171);
       writeValue(buffer, value.encode());
-    }    else if (value is ResourceSize) {
+    }    else if (value is IconRequest) {
       buffer.putUint8(172);
       writeValue(buffer, value.encode());
-    }    else if (value is Resource) {
+    }    else if (value is ResourceSize) {
       buffer.putUint8(173);
       writeValue(buffer, value.encode());
-    }    else if (value is IconResult) {
+    }    else if (value is Resource) {
       buffer.putUint8(174);
       writeValue(buffer, value.encode());
-    }    else if (value is CookiePartitionKey) {
+    }    else if (value is IconResult) {
       buffer.putUint8(175);
       writeValue(buffer, value.encode());
-    }    else if (value is Cookie) {
+    }    else if (value is CookiePartitionKey) {
       buffer.putUint8(176);
       writeValue(buffer, value.encode());
-    }    else if (value is VisitInfo) {
+    }    else if (value is Cookie) {
       buffer.putUint8(177);
       writeValue(buffer, value.encode());
-    }    else if (value is HistoryItem) {
+    }    else if (value is VisitInfo) {
       buffer.putUint8(178);
       writeValue(buffer, value.encode());
-    }    else if (value is HistoryState) {
+    }    else if (value is HistoryItem) {
       buffer.putUint8(179);
       writeValue(buffer, value.encode());
-    }    else if (value is ReaderableState) {
+    }    else if (value is HistoryState) {
       buffer.putUint8(180);
       writeValue(buffer, value.encode());
-    }    else if (value is SecurityInfoState) {
+    }    else if (value is ReaderableState) {
       buffer.putUint8(181);
       writeValue(buffer, value.encode());
-    }    else if (value is TabContentState) {
+    }    else if (value is SecurityInfoState) {
       buffer.putUint8(182);
       writeValue(buffer, value.encode());
-    }    else if (value is FindResultState) {
+    }    else if (value is TabContentState) {
       buffer.putUint8(183);
       writeValue(buffer, value.encode());
-    }    else if (value is CustomSelectionAction) {
+    }    else if (value is FindResultState) {
       buffer.putUint8(184);
       writeValue(buffer, value.encode());
-    }    else if (value is WebExtensionData) {
+    }    else if (value is CustomSelectionAction) {
       buffer.putUint8(185);
       writeValue(buffer, value.encode());
-    }    else if (value is GeckoSuggestion) {
+    }    else if (value is WebExtensionData) {
       buffer.putUint8(186);
       writeValue(buffer, value.encode());
-    }    else if (value is TabContent) {
+    }    else if (value is GeckoSuggestion) {
       buffer.putUint8(187);
       writeValue(buffer, value.encode());
-    }    else if (value is ContentBlocking) {
+    }    else if (value is TabContent) {
       buffer.putUint8(188);
       writeValue(buffer, value.encode());
-    }    else if (value is DohSettings) {
+    }    else if (value is ContentBlocking) {
       buffer.putUint8(189);
       writeValue(buffer, value.encode());
-    }    else if (value is GeckoEngineSettings) {
+    }    else if (value is DohSettings) {
       buffer.putUint8(190);
       writeValue(buffer, value.encode());
-    }    else if (value is AutocompleteResult) {
+    }    else if (value is GeckoEngineSettings) {
       buffer.putUint8(191);
       writeValue(buffer, value.encode());
-    }    else if (value is UnknownHitResult) {
+    }    else if (value is AutocompleteResult) {
       buffer.putUint8(192);
       writeValue(buffer, value.encode());
-    }    else if (value is ImageHitResult) {
+    }    else if (value is UnknownHitResult) {
       buffer.putUint8(193);
       writeValue(buffer, value.encode());
-    }    else if (value is VideoHitResult) {
+    }    else if (value is ImageHitResult) {
       buffer.putUint8(194);
       writeValue(buffer, value.encode());
-    }    else if (value is AudioHitResult) {
+    }    else if (value is VideoHitResult) {
       buffer.putUint8(195);
       writeValue(buffer, value.encode());
-    }    else if (value is ImageSrcHitResult) {
+    }    else if (value is AudioHitResult) {
       buffer.putUint8(196);
       writeValue(buffer, value.encode());
-    }    else if (value is PhoneHitResult) {
+    }    else if (value is ImageSrcHitResult) {
       buffer.putUint8(197);
       writeValue(buffer, value.encode());
-    }    else if (value is EmailHitResult) {
+    }    else if (value is PhoneHitResult) {
       buffer.putUint8(198);
       writeValue(buffer, value.encode());
-    }    else if (value is GeoHitResult) {
+    }    else if (value is EmailHitResult) {
       buffer.putUint8(199);
       writeValue(buffer, value.encode());
-    }    else if (value is DownloadState) {
+    }    else if (value is GeoHitResult) {
       buffer.putUint8(200);
       writeValue(buffer, value.encode());
-    }    else if (value is ShareInternetResourceState) {
+    }    else if (value is DownloadState) {
       buffer.putUint8(201);
       writeValue(buffer, value.encode());
-    }    else if (value is AddonCollection) {
+    }    else if (value is ShareInternetResourceState) {
       buffer.putUint8(202);
       writeValue(buffer, value.encode());
-    }    else if (value is GeckoPref) {
+    }    else if (value is AddonCollection) {
       buffer.putUint8(203);
       writeValue(buffer, value.encode());
-    }    else if (value is MlProgressData) {
+    }    else if (value is GeckoPref) {
       buffer.putUint8(204);
       writeValue(buffer, value.encode());
-    }    else if (value is ContainerSiteAssignment) {
+    }    else if (value is MlProgressData) {
       buffer.putUint8(205);
       writeValue(buffer, value.encode());
-    }    else if (value is GeckoHeader) {
+    }    else if (value is ContainerSiteAssignment) {
       buffer.putUint8(206);
       writeValue(buffer, value.encode());
-    }    else if (value is GeckoFetchRequest) {
+    }    else if (value is GeckoHeader) {
       buffer.putUint8(207);
       writeValue(buffer, value.encode());
-    }    else if (value is GeckoFetchResponse) {
+    }    else if (value is GeckoFetchRequest) {
       buffer.putUint8(208);
       writeValue(buffer, value.encode());
-    }    else if (value is BookmarkNode) {
+    }    else if (value is GeckoFetchResponse) {
       buffer.putUint8(209);
       writeValue(buffer, value.encode());
-    }    else if (value is BookmarkInfo) {
+    }    else if (value is BookmarkNode) {
       buffer.putUint8(210);
       writeValue(buffer, value.encode());
-    }    else if (value is SitePermissions) {
+    }    else if (value is BookmarkInfo) {
       buffer.putUint8(211);
       writeValue(buffer, value.encode());
-    }    else if (value is TrackingProtectionException) {
+    }    else if (value is SitePermissions) {
       buffer.putUint8(212);
       writeValue(buffer, value.encode());
+    }    else if (value is TrackingProtectionException) {
+      buffer.putUint8(213);
+      writeValue(buffer, value.encode());
     } else {
       super.writeValue(buffer, value);
     }
@@ -4067,156 +4080,159 @@ class _PigeonCodec extends StandardMessageCodec {
         return value == null ? null : CookieBannerHandlingMode.values[value];
       case 144: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : WebContentIsolationStrategy.values[value];
+        return value == null ? null : AppLinksMode.values[value];
       case 145: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : CustomCookiePolicy.values[value];
+        return value == null ? null : WebContentIsolationStrategy.values[value];
       case 146: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : TrackingScope.values[value];
+        return value == null ? null : CustomCookiePolicy.values[value];
       case 147: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : DohSettingsMode.values[value];
+        return value == null ? null : TrackingScope.values[value];
       case 148: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : DownloadStatus.values[value];
+        return value == null ? null : DohSettingsMode.values[value];
       case 149: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : LogLevel.values[value];
+        return value == null ? null : DownloadStatus.values[value];
       case 150: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : MlProgressType.values[value];
+        return value == null ? null : LogLevel.values[value];
       case 151: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : MlProgressStatus.values[value];
+        return value == null ? null : MlProgressType.values[value];
       case 152: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : ClearDataType.values[value];
+        return value == null ? null : MlProgressStatus.values[value];
       case 153: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : GeckoFetchMethod.values[value];
+        return value == null ? null : ClearDataType.values[value];
       case 154: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : GeckoFetchRedircet.values[value];
+        return value == null ? null : GeckoFetchMethod.values[value];
       case 155: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : GeckoFetchCookiePolicy.values[value];
+        return value == null ? null : GeckoFetchRedircet.values[value];
       case 156: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : BookmarkNodeType.values[value];
+        return value == null ? null : GeckoFetchCookiePolicy.values[value];
       case 157: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : SitePermissionStatus.values[value];
+        return value == null ? null : BookmarkNodeType.values[value];
       case 158: 
         final value = readValue(buffer) as int?;
-        return value == null ? null : AutoplayStatus.values[value];
+        return value == null ? null : SitePermissionStatus.values[value];
       case 159: 
-        return TranslationOptions.decode(readValue(buffer)!);
+        final value = readValue(buffer) as int?;
+        return value == null ? null : AutoplayStatus.values[value];
       case 160: 
-        return ReaderState.decode(readValue(buffer)!);
+        return TranslationOptions.decode(readValue(buffer)!);
       case 161: 
-        return AddTabParams.decode(readValue(buffer)!);
+        return ReaderState.decode(readValue(buffer)!);
       case 162: 
-        return LastMediaAccessState.decode(readValue(buffer)!);
+        return AddTabParams.decode(readValue(buffer)!);
       case 163: 
-        return HistoryMetadataKey.decode(readValue(buffer)!);
+        return LastMediaAccessState.decode(readValue(buffer)!);
       case 164: 
-        return PackageCategoryValue.decode(readValue(buffer)!);
+        return HistoryMetadataKey.decode(readValue(buffer)!);
       case 165: 
-        return ExternalPackage.decode(readValue(buffer)!);
+        return PackageCategoryValue.decode(readValue(buffer)!);
       case 166: 
-        return LoadUrlFlagsValue.decode(readValue(buffer)!);
+        return ExternalPackage.decode(readValue(buffer)!);
       case 167: 
-        return SourceValue.decode(readValue(buffer)!);
+        return LoadUrlFlagsValue.decode(readValue(buffer)!);
       case 168: 
-        return TabState.decode(readValue(buffer)!);
+        return SourceValue.decode(readValue(buffer)!);
       case 169: 
-        return RecoverableTab.decode(readValue(buffer)!);
+        return TabState.decode(readValue(buffer)!);
       case 170: 
-        return RecoverableBrowserState.decode(readValue(buffer)!);
+        return RecoverableTab.decode(readValue(buffer)!);
       case 171: 
-        return IconRequest.decode(readValue(buffer)!);
+        return RecoverableBrowserState.decode(readValue(buffer)!);
       case 172: 
-        return ResourceSize.decode(readValue(buffer)!);
+        return IconRequest.decode(readValue(buffer)!);
       case 173: 
-        return Resource.decode(readValue(buffer)!);
+        return ResourceSize.decode(readValue(buffer)!);
       case 174: 
-        return IconResult.decode(readValue(buffer)!);
+        return Resource.decode(readValue(buffer)!);
       case 175: 
-        return CookiePartitionKey.decode(readValue(buffer)!);
+        return IconResult.decode(readValue(buffer)!);
       case 176: 
-        return Cookie.decode(readValue(buffer)!);
+        return CookiePartitionKey.decode(readValue(buffer)!);
       case 177: 
-        return VisitInfo.decode(readValue(buffer)!);
+        return Cookie.decode(readValue(buffer)!);
       case 178: 
-        return HistoryItem.decode(readValue(buffer)!);
+        return VisitInfo.decode(readValue(buffer)!);
       case 179: 
-        return HistoryState.decode(readValue(buffer)!);
+        return HistoryItem.decode(readValue(buffer)!);
       case 180: 
-        return ReaderableState.decode(readValue(buffer)!);
+        return HistoryState.decode(readValue(buffer)!);
       case 181: 
-        return SecurityInfoState.decode(readValue(buffer)!);
+        return ReaderableState.decode(readValue(buffer)!);
       case 182: 
-        return TabContentState.decode(readValue(buffer)!);
+        return SecurityInfoState.decode(readValue(buffer)!);
       case 183: 
-        return FindResultState.decode(readValue(buffer)!);
+        return TabContentState.decode(readValue(buffer)!);
       case 184: 
-        return CustomSelectionAction.decode(readValue(buffer)!);
+        return FindResultState.decode(readValue(buffer)!);
       case 185: 
-        return WebExtensionData.decode(readValue(buffer)!);
+        return CustomSelectionAction.decode(readValue(buffer)!);
       case 186: 
-        return GeckoSuggestion.decode(readValue(buffer)!);
+        return WebExtensionData.decode(readValue(buffer)!);
       case 187: 
-        return TabContent.decode(readValue(buffer)!);
+        return GeckoSuggestion.decode(readValue(buffer)!);
       case 188: 
-        return ContentBlocking.decode(readValue(buffer)!);
+        return TabContent.decode(readValue(buffer)!);
       case 189: 
-        return DohSettings.decode(readValue(buffer)!);
+        return ContentBlocking.decode(readValue(buffer)!);
       case 190: 
-        return GeckoEngineSettings.decode(readValue(buffer)!);
+        return DohSettings.decode(readValue(buffer)!);
       case 191: 
-        return AutocompleteResult.decode(readValue(buffer)!);
+        return GeckoEngineSettings.decode(readValue(buffer)!);
       case 192: 
-        return UnknownHitResult.decode(readValue(buffer)!);
+        return AutocompleteResult.decode(readValue(buffer)!);
       case 193: 
-        return ImageHitResult.decode(readValue(buffer)!);
+        return UnknownHitResult.decode(readValue(buffer)!);
       case 194: 
-        return VideoHitResult.decode(readValue(buffer)!);
+        return ImageHitResult.decode(readValue(buffer)!);
       case 195: 
-        return AudioHitResult.decode(readValue(buffer)!);
+        return VideoHitResult.decode(readValue(buffer)!);
       case 196: 
-        return ImageSrcHitResult.decode(readValue(buffer)!);
+        return AudioHitResult.decode(readValue(buffer)!);
       case 197: 
-        return PhoneHitResult.decode(readValue(buffer)!);
+        return ImageSrcHitResult.decode(readValue(buffer)!);
       case 198: 
-        return EmailHitResult.decode(readValue(buffer)!);
+        return PhoneHitResult.decode(readValue(buffer)!);
       case 199: 
-        return GeoHitResult.decode(readValue(buffer)!);
+        return EmailHitResult.decode(readValue(buffer)!);
       case 200: 
-        return DownloadState.decode(readValue(buffer)!);
+        return GeoHitResult.decode(readValue(buffer)!);
       case 201: 
-        return ShareInternetResourceState.decode(readValue(buffer)!);
+        return DownloadState.decode(readValue(buffer)!);
       case 202: 
-        return AddonCollection.decode(readValue(buffer)!);
+        return ShareInternetResourceState.decode(readValue(buffer)!);
       case 203: 
-        return GeckoPref.decode(readValue(buffer)!);
+        return AddonCollection.decode(readValue(buffer)!);
       case 204: 
-        return MlProgressData.decode(readValue(buffer)!);
+        return GeckoPref.decode(readValue(buffer)!);
       case 205: 
-        return ContainerSiteAssignment.decode(readValue(buffer)!);
+        return MlProgressData.decode(readValue(buffer)!);
       case 206: 
-        return GeckoHeader.decode(readValue(buffer)!);
+        return ContainerSiteAssignment.decode(readValue(buffer)!);
       case 207: 
-        return GeckoFetchRequest.decode(readValue(buffer)!);
+        return GeckoHeader.decode(readValue(buffer)!);
       case 208: 
-        return GeckoFetchResponse.decode(readValue(buffer)!);
+        return GeckoFetchRequest.decode(readValue(buffer)!);
       case 209: 
-        return BookmarkNode.decode(readValue(buffer)!);
+        return GeckoFetchResponse.decode(readValue(buffer)!);
       case 210: 
-        return BookmarkInfo.decode(readValue(buffer)!);
+        return BookmarkNode.decode(readValue(buffer)!);
       case 211: 
-        return SitePermissions.decode(readValue(buffer)!);
+        return BookmarkInfo.decode(readValue(buffer)!);
       case 212: 
+        return SitePermissions.decode(readValue(buffer)!);
+      case 213: 
         return TrackingProtectionException.decode(readValue(buffer)!);
       default:
         return super.readValueOfType(type, buffer);
@@ -4414,6 +4430,57 @@ class GeckoEngineSettingsApi {
       return;
     }
   }
+
+  /// Sets the app links mode preference (stored in SharedPreferences).
+  /// Controls how external app links are handled in the browser.
+  Future<void> setAppLinksMode(AppLinksMode mode) async {
+    final pigeonVar_channelName = 'dev.flutter.pigeon.flutter_mozilla_components.GeckoEngineSettingsApi.setAppLinksMode$pigeonVar_messageChannelSuffix';
+    final pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(<Object?>[mode]);
+    final pigeonVar_replyList = await pigeonVar_sendFuture as List<Object?>?;
+    if (pigeonVar_replyList == null) {
+      throw _createConnectionError(pigeonVar_channelName);
+    } else if (pigeonVar_replyList.length > 1) {
+      throw PlatformException(
+        code: pigeonVar_replyList[0]! as String,
+        message: pigeonVar_replyList[1] as String?,
+        details: pigeonVar_replyList[2],
+      );
+    } else {
+      return;
+    }
+  }
+
+  Future<AppLinksMode> getAppLinksMode() async {
+    final pigeonVar_channelName = 'dev.flutter.pigeon.flutter_mozilla_components.GeckoEngineSettingsApi.getAppLinksMode$pigeonVar_messageChannelSuffix';
+    final pigeonVar_channel = BasicMessageChannel<Object?>(
+      pigeonVar_channelName,
+      pigeonChannelCodec,
+      binaryMessenger: pigeonVar_binaryMessenger,
+    );
+    final Future<Object?> pigeonVar_sendFuture = pigeonVar_channel.send(null);
+    final pigeonVar_replyList = await pigeonVar_sendFuture as List<Object?>?;
+    if (pigeonVar_replyList == null) {
+      throw _createConnectionError(pigeonVar_channelName);
+    } else if (pigeonVar_replyList.length > 1) {
+      throw PlatformException(
+        code: pigeonVar_replyList[0]! as String,
+        message: pigeonVar_replyList[1] as String?,
+        details: pigeonVar_replyList[2],
+      );
+    } else if (pigeonVar_replyList[0] == null) {
+      throw PlatformException(
+        code: 'null-error',
+        message: 'Host platform returned null value for non-null return value.',
+      );
+    } else {
+      return (pigeonVar_replyList[0] as AppLinksMode?)!;
+    }
+  }
 }
 
 class GeckoSessionApi {

packages/flutter_mozilla_components/pigeons/gecko.dart

@@ -640,6 +640,18 @@ enum ColorScheme { system, light, dark }
 
 enum CookieBannerHandlingMode { disabled, rejectAll, rejectOrAcceptAll }
 
+/// App links behavior mode - controls how external app links are handled
+enum AppLinksMode {
+  /// Always open links in their native apps without prompting
+  always,
+
+  /// Prompt user before opening in app (with "Always open" checkbox)
+  ask,
+
+  /// Never open links in external apps, always use browser
+  never,
+}
+
 enum WebContentIsolationStrategy {
   isolateNothing,
   isolateEverything,
@@ -994,6 +1006,12 @@ abstract class GeckoEngineSettingsApi {
   void setDefaultSettings(GeckoEngineSettings settings);
   void updateRuntimeSettings(GeckoEngineSettings settings);
   void setPullToRefreshEnabled(bool enabled);
+
+  /// Sets the app links mode preference (stored in SharedPreferences).
+  /// Controls how external app links are handled in the browser.
+  void setAppLinksMode(AppLinksMode mode);
+
+  AppLinksMode getAppLinksMode();
 }
 
 @HostApi()