From 3f032619b47afd2a8beebe79ed2d071aaca4e436 Mon Sep 17 00:00:00 2001
From: Tamius Han <ziga.pirih@hotmail.com>
Date: Fri, 3 Apr 2026 13:26:01 +0200
Subject: [PATCH] Fix firefox errors in cross-iframe communiccation

---
 src/ext/module/EventBus.ts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/ext/module/EventBus.ts b/src/ext/module/EventBus.ts
index db83bf2..ebe1b3a 100644
--- a/src/ext/module/EventBus.ts
+++ b/src/ext/module/EventBus.ts
@@ -90,7 +90,24 @@ export default class EventBus {
     }
   }
 
+  private cloneContext(context: EventBusContext = {}): EventBusContext {
+    return {
+      stopPropagation: context.stopPropagation,
+      origin: context.origin,
+      frameUrl: context.frameUrl,
+      visitedBusses: context.visitedBusses ? [...context.visitedBusses] : undefined,
+      commandId: context.commandId,
+      comms: context.comms ? {
+        forwardTo: context.comms.forwardTo,
+        sourceFrame: context.comms.sourceFrame ? { ...context.comms.sourceFrame } : undefined
+      } : undefined,
+      borderCrossings: context.borderCrossings ? { ...context.borderCrossings } : undefined
+    };
+  }
+
   send(command: string, commandData: any, context: EventBusContext = {}) {
+    context = this.cloneContext(context);  // Firefox throws an error if we don't clone the context.
+
     if (context.visitedBusses?.includes(this.uuid)) {
       console.warn('this bus was already visited before. Doing nothing.');
       return;