diff --git a/lib/ace/worker/worker_client.js b/lib/ace/worker/worker_client.js
index d7a2c172..a58b7c6e 100644
--- a/lib/ace/worker/worker_client.js
+++ b/lib/ace/worker/worker_client.js
@@ -158,12 +158,11 @@ var WorkerClient = function(topLevelNamespaces, packagedJs, module, classname) {
 
     this.emit = function(event, data) {
         try {
-            this.$worker.postMessage({event: event, data: data});
-        }
-        catch(ex) {
-            console.log("no worker");
-            console.trace();
+            // firefox refuses to clone objects which have function properties
+            // TODO: cleanup event
+            this.$worker.postMessage({event: event, data: {data: data.data}});
         }
+        catch(ex) {}
     };
 	
 	this.attachToDocument = function(doc) {