--- a/testing/marionette/components/marionettecomponent.js
+++ b/testing/marionette/components/marionettecomponent.js
@@ -65,17 +65,18 @@ MarionetteComponent.prototype = {
         port = Services.prefs.getIntPref('marionette.defaultPrefs.port');
       }
       catch(e) {
         port = 2828;
       }
       try {
         Cu.import('resource:///modules/devtools/dbg-server.jsm');
         DebuggerServer.addActors('chrome://marionette/content/marionette-actors.js');
-        DebuggerServer.initTransport();
+        // Always allow remote connections.
+        DebuggerServer.initTransport(function () { return true; });
         DebuggerServer.openListener(port, true);
       }
       catch(e) {
         this.logger.error('exception: ' + e.name + ', ' + e.message);
       }
     }
   },