fix node debugger on firefox

plugins/c9.ide.run.debug/debuggers/v8/v8debugger.js

@@ -71,10 +71,6 @@ define(function(require, exports, module) {
                     }, eventForwarder);
                 });
                 
-                dbg.on(event, function(e) {
-                    return emit(event, e);
-                }, eventForwarder);
-                
                 dbg.attach(socket, reconnect, callback);
             });
         }

plugins/c9.ide.ui/lib_apf.js

@@ -169,6 +169,9 @@ define(["require", "module", "exports", "./lib/menu/menu", "./lib/crypto",
         if (this.$bdetect)
             return;
         
+        // remove non-standard window.event
+        try { delete window.event } catch(e) {}
+        
         /* Browser -  platform and feature detection, based on prototype's and mootools 1.3.
          *
          * Major browser/engines flags