--- a/toolkit/components/extensions/ExtensionChild.jsm
+++ b/toolkit/components/extensions/ExtensionChild.jsm
@@ -722,17 +722,19 @@ class ChildAPIManager {
     }
 
     switch (name || messageName) {
       case "API:RunListener":
         let map = this.listeners.get(data.path);
         let listener = map.ids.get(data.listenerId);
 
         if (listener) {
-          return this.context.runSafe(listener, ...data.args);
+          let args = data.args.deserialize(this.context.cloneScope);
+
+          return this.context.runSafeWithoutClone(listener, ...args);
         }
         if (!map.removedIds.has(data.listenerId)) {
           Services.console.logStringMessage(
             `Unknown listener at childId=${data.childId} path=${data.path} listenerId=${data.listenerId}\n`);
         }
         break;
 
       case "API:CallResult":

--- a/toolkit/components/extensions/ExtensionParent.jsm
+++ b/toolkit/components/extensions/ExtensionParent.jsm
@@ -644,17 +644,17 @@ ParentAPIManager = {
     function listener(...listenerArgs) {
       return context.sendMessage(
         context.parentMessageManager,
         "API:RunListener",
         {
           childId,
           listenerId: data.listenerId,
           path: data.path,
-          args: listenerArgs,
+          args: new StructuredCloneHolder(listenerArgs),
         },
         {
           recipient: {childId},
         });
     }
 
     context.listenerProxies.set(data.listenerId, listener);