I can't hide the location and status bars in Firefox, IE or Chromium.

It only works in Safari and Opera.
https://developer.mozilla.org/En/DOM/Window.open confirms that by
default, Firefox and IE forces their presence.

plugins/Realtime/realtimeupdate.js

@@ -268,7 +268,7 @@ RealtimeUpdate = {
          PP.bind('click', function() {
              window.open(url,
                          '',
-                         'toolbar=no,resizable=yes,scrollbars=yes,status=yes,width=500,height=550');
+                         'toolbar=no,resizable=yes,scrollbars=yes,status=no,menubar=no,personalbar=no,location=no,width=500,height=550');
 
              return false;
          });