support non firefox gecko browsers

build/js/ox.load.js

@@ -44,6 +44,8 @@ $(function() {
                 userAgent = name;
                 return false;
             }
+            if (!userAgent && navigator.userAgent.indexOf('Gecko') > -1)
+                userAgent = 'Firefox';
         });
         return userAgent;
     }
@@ -151,4 +153,4 @@ $(function() {
         }
     }
 
-});
+});