diff --git a/mozilla/xpfe/communicator/resources/content/contentAreaUtils.js b/mozilla/xpfe/communicator/resources/content/contentAreaUtils.js
index c0955c54468..03c941d65b8 100644
--- a/mozilla/xpfe/communicator/resources/content/contentAreaUtils.js
+++ b/mozilla/xpfe/communicator/resources/content/contentAreaUtils.js
@@ -104,6 +104,8 @@ function openNewWindowWith(url, sendReferrer)
 
 function openTopBrowserWith(url)
 {
+  urlSecurityCheck(url, document);
+
   var windowMediator = Components.classes["@mozilla.org/appshell/window-mediator;1"].getService(Components.interfaces.nsIWindowMediator);
   var browserWin = windowMediator.getMostRecentWindow("navigator:browser");