added support for overriding locales

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

@@ -73,6 +73,7 @@ object EngineProvider {
             //builder.debugLogging(components.logLevel == Log.Priority.DEBUG)
             builder.consoleOutput(components.logLevel == Log.Priority.DEBUG)
             builder.contentBlocking(contentBlocking.build())
+            builder.locales(arrayOf("en-US", "en")) // Will be overridden later
 
             runtime = GeckoRuntime.create(context, builder.build())
         }

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

@@ -6,6 +6,7 @@
 
 package eu.weblibre.flutter_mozilla_components.api
 
+import eu.weblibre.flutter_mozilla_components.EngineProvider
 import eu.weblibre.flutter_mozilla_components.GlobalComponents
 import eu.weblibre.flutter_mozilla_components.pigeons.ColorScheme
 import eu.weblibre.flutter_mozilla_components.pigeons.CookieBannerHandlingMode
@@ -147,6 +148,10 @@ class GeckoEngineSettingsApiImpl : GeckoEngineSettingsApi {
         if(settings.fingerprintingProtectionOverrides != null) {
             components.core.engineSettings.fingerprintingProtectionOverrides = settings.fingerprintingProtectionOverrides
         }
+        if(settings.locales != null) {
+//            components.core.engineSettings.automaticLanguageAdjustment = false
+            components.core.runtime.settings.locales = settings.locales.toTypedArray()
+        }
     }
 
     override fun updateRuntimeSettings(settings: GeckoEngineSettings) {

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

@@ -14,6 +14,7 @@ import eu.weblibre.flutter_mozilla_components.Components
 import eu.weblibre.flutter_mozilla_components.interceptor.AppRequestInterceptor
 import eu.weblibre.flutter_mozilla_components.services.DownloadService
 import eu.weblibre.flutter_mozilla_components.EngineProvider
+import eu.weblibre.flutter_mozilla_components.EngineProvider.getOrCreateRuntime
 import eu.weblibre.flutter_mozilla_components.PermissionStorage
 import eu.weblibre.flutter_mozilla_components.services.MediaSessionService
 import eu.weblibre.flutter_mozilla_components.activities.NotificationActivity
@@ -58,6 +59,7 @@ import mozilla.components.feature.session.middleware.undo.UndoMiddleware
 import mozilla.components.feature.sitepermissions.OnDiskSitePermissionsStorage
 import mozilla.components.feature.webnotifications.WebNotificationFeature
 import mozilla.components.support.base.worker.Frequency
+import org.mozilla.geckoview.GeckoRuntime
 import java.util.concurrent.TimeUnit
 
 private const val AMO_COLLECTION_MAX_CACHE_AGE = 24 * 60L
@@ -107,6 +109,10 @@ class Core(
         )
     }
 
+    val runtime: GeckoRuntime by lazy {
+        getOrCreateRuntime(context)
+    }
+
     val engine: Engine by lazy {
         EngineProvider.createEngine(context, engineSettings, extensionEvents)
     }

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

@@ -1678,7 +1678,8 @@ data class GeckoEngineSettings (
   val contentBlocking: ContentBlocking? = null,
   val enterpriseRootsEnabled: Boolean? = null,
   val dohSettings: DohSettings? = null,
-  val fingerprintingProtectionOverrides: String? = null
+  val fingerprintingProtectionOverrides: String? = null,
+  val locales: List<String>? = null
 )
  {
   companion object {
@@ -1698,7 +1699,8 @@ data class GeckoEngineSettings (
       val enterpriseRootsEnabled = pigeonVar_list[12] as Boolean?
       val dohSettings = pigeonVar_list[13] as DohSettings?
       val fingerprintingProtectionOverrides = pigeonVar_list[14] as String?
-      return GeckoEngineSettings(javascriptEnabled, trackingProtectionPolicy, httpsOnlyMode, globalPrivacyControlEnabled, preferredColorScheme, cookieBannerHandlingMode, cookieBannerHandlingModePrivateBrowsing, cookieBannerHandlingGlobalRules, cookieBannerHandlingGlobalRulesSubFrames, webContentIsolationStrategy, userAgent, contentBlocking, enterpriseRootsEnabled, dohSettings, fingerprintingProtectionOverrides)
+      val locales = pigeonVar_list[15] as List<String>?
+      return GeckoEngineSettings(javascriptEnabled, trackingProtectionPolicy, httpsOnlyMode, globalPrivacyControlEnabled, preferredColorScheme, cookieBannerHandlingMode, cookieBannerHandlingModePrivateBrowsing, cookieBannerHandlingGlobalRules, cookieBannerHandlingGlobalRulesSubFrames, webContentIsolationStrategy, userAgent, contentBlocking, enterpriseRootsEnabled, dohSettings, fingerprintingProtectionOverrides, locales)
     }
   }
   fun toList(): List<Any?> {
@@ -1718,6 +1720,7 @@ data class GeckoEngineSettings (
       enterpriseRootsEnabled,
       dohSettings,
       fingerprintingProtectionOverrides,
+      locales,
     )
   }
   override fun equals(other: Any?): Boolean {

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

@@ -2044,6 +2044,7 @@ class GeckoEngineSettings {
     this.enterpriseRootsEnabled,
     this.dohSettings,
     this.fingerprintingProtectionOverrides,
+    this.locales,
   });
 
   bool? javascriptEnabled;
@@ -2076,6 +2077,8 @@ class GeckoEngineSettings {
 
   String? fingerprintingProtectionOverrides;
 
+  List<String>? locales;
+
   List<Object?> _toList() {
     return <Object?>[
       javascriptEnabled,
@@ -2093,6 +2096,7 @@ class GeckoEngineSettings {
       enterpriseRootsEnabled,
       dohSettings,
       fingerprintingProtectionOverrides,
+      locales,
     ];
   }
 
@@ -2117,6 +2121,7 @@ class GeckoEngineSettings {
       enterpriseRootsEnabled: result[12] as bool?,
       dohSettings: result[13] as DohSettings?,
       fingerprintingProtectionOverrides: result[14] as String?,
+      locales: (result[15] as List<Object?>?)?.cast<String>(),
     );
   }
 

packages/flutter_mozilla_components/pigeons/gecko.dart

@@ -667,6 +667,7 @@ class GeckoEngineSettings {
   final bool? enterpriseRootsEnabled;
   final DohSettings? dohSettings;
   final String? fingerprintingProtectionOverrides;
+  final List<String>? locales;
 
   GeckoEngineSettings(
     this.javascriptEnabled,
@@ -684,6 +685,7 @@ class GeckoEngineSettings {
     this.enterpriseRootsEnabled,
     this.dohSettings,
     this.fingerprintingProtectionOverrides,
+    this.locales,
   );
 }