finish switch to event sequence

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/feature/KeyboardVisibilityFeature.kt

@@ -186,13 +186,13 @@ class KeyboardVisibilityFeature(
         lastKeyboardHeight = heightPx
         lastKeyboardVisible = isVisible
 
-        val timestamp = EventSequence.next()
+        val sequence = EventSequence.next()
 
         logger.debug("$TAG: Keyboard change - height=$heightPx, visible=$isVisible, animating=$isAnimating")
 
         runOnUiThread {
             flutterEvents.onKeyboardVisibilityChanged(
-                timestamp,
+                sequence,
                 heightPx.toLong(),
                 isVisible,
                 isAnimating

packages/flutter_mozilla_components/android/src/main/kotlin/eu/weblibre/flutter_mozilla_components/feature/WebExtensionToolbarFeature.kt

@@ -67,7 +67,7 @@ class WebExtensionToolbarFeature(
             .filter { !store.state.extensions.containsKey(it) || store.state.extensions[it]?.enabled == false }
             .forEach { extensionId ->
                 addonEvents.onRemoveWebExtensionAction(
-                    timestampArg = EventSequence.next(),
+                    sequenceArg = EventSequence.next(),
                     extensionIdArg = extensionId,
                     actionTypeArg = WebExtensionActionType.BROWSER,
                 ) {}
@@ -78,7 +78,7 @@ class WebExtensionToolbarFeature(
             .filter { !store.state.extensions.containsKey(it) || store.state.extensions[it]?.enabled == false }
             .forEach { extensionId ->
                 addonEvents.onRemoveWebExtensionAction(
-                    timestampArg = EventSequence.next(),
+                    sequenceArg = EventSequence.next(),
                     extensionIdArg = extensionId,
                     actionTypeArg = WebExtensionActionType.PAGE,
                 ) {}
@@ -107,7 +107,7 @@ class WebExtensionToolbarFeature(
         webExtensionBrowserActions.keys.toList().forEach { extensionId ->
             if (extensionId !in enabledExtensionIds) {
                 addonEvents.onRemoveWebExtensionAction(
-                    timestampArg = EventSequence.next(),
+                    sequenceArg = EventSequence.next(),
                     extensionIdArg = extensionId,
                     actionTypeArg = WebExtensionActionType.BROWSER,
                 ) {}
@@ -118,7 +118,7 @@ class WebExtensionToolbarFeature(
         webExtensionPageActions.keys.toList().forEach { extensionId ->
             if (extensionId !in enabledExtensionIds) {
                 addonEvents.onRemoveWebExtensionAction(
-                    timestampArg = EventSequence.next(),
+                    sequenceArg = EventSequence.next(),
                     extensionIdArg = extensionId,
                     actionTypeArg = WebExtensionActionType.PAGE,
                 ) {}
@@ -131,7 +131,7 @@ class WebExtensionToolbarFeature(
             if (extensionNotAllowedInTab(extension, tab)) {
                 webExtensionPageActions[extension.id]?.let {
                     addonEvents.onRemoveWebExtensionAction(
-                        timestampArg = EventSequence.next(),
+                        sequenceArg = EventSequence.next(),
                         extensionIdArg = extension.id,
                         actionTypeArg = WebExtensionActionType.PAGE,
                     ) {}
@@ -139,7 +139,7 @@ class WebExtensionToolbarFeature(
                 }
                 webExtensionBrowserActions[extension.id]?.let {
                     addonEvents.onRemoveWebExtensionAction(
-                        timestampArg = EventSequence.next(),
+                        sequenceArg = EventSequence.next(),
                         extensionIdArg = extension.id,
                         actionTypeArg = WebExtensionActionType.BROWSER,
                     ) {}
@@ -221,7 +221,7 @@ class WebExtensionToolbarFeature(
         )
 
         addonEvents.onUpsertWebExtensionAction(
-            timestampArg = EventSequence.next(),
+            sequenceArg = EventSequence.next(),
             extensionIdArg = extension.id,
             actionTypeArg = if (isPageAction) WebExtensionActionType.PAGE else WebExtensionActionType.BROWSER,
             extensionDataArg = data
@@ -236,7 +236,7 @@ class WebExtensionToolbarFeature(
                     val imageBytes = icon.toWebPBytes()
                     runOnUiThread {
                         addonEvents.onUpdateWebExtensionIcon(
-                            timestampArg = EventSequence.next(),
+                            sequenceArg = EventSequence.next(),
                             extensionIdArg = extensionId,
                             actionTypeArg = if (isPageAction) WebExtensionActionType.PAGE else WebExtensionActionType.BROWSER,
                             iconArg = imageBytes

packages/simple_intent_receiver/android/src/main/kotlin/eu/weblibre/simple_intent_receiver/IntentReceiver.kt

@@ -22,7 +22,7 @@ package eu.weblibre.simple_intent_receiver
 import io.flutter.plugin.common.BinaryMessenger
 import eu.weblibre.simple_intent_receiver.pigeons.IntentEvents
 import eu.weblibre.simple_intent_receiver.pigeons.Intent as PigeonIntent
-import eu.weblibre.flutter_mozilla_components.ext.EventSequence
+import eu.weblibre.simple_intent_receiver.ext.EventSequence
 
 class IntentReceiver(messenger: BinaryMessenger) {
     private val intentEvents: IntentEvents = IntentEvents(messenger)
@@ -31,4 +31,3 @@ class IntentReceiver(messenger: BinaryMessenger) {
         intentEvents.onIntentReceived(EventSequence.next(), intent) { }
     }
 }
-}

packages/simple_intent_receiver/android/src/main/kotlin/eu/weblibre/simple_intent_receiver/ext/EventSequence.kt

@@ -0,0 +1,22 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+package eu.weblibre.simple_intent_receiver.ext
+
+import java.util.concurrent.atomic.AtomicLong
+
+/**
+ * Thread-safe monotonic sequence counter for event ordering.
+ *
+ * Replaces System.currentTimeMillis() for event timestamps sent to Flutter,
+ * guaranteeing strictly increasing values regardless of wall-clock changes
+ * and eliminating same-millisecond collisions.
+ */
+object EventSequence {
+    private val counter = AtomicLong(0)
+
+    fun next(): Long = counter.incrementAndGet()
+}