Bug 408268 Closing the browser without dismissing the Customize Toolbar dialog leads to loss of all toolbar items. r=Neil Deakin sr=neil@parkwaycc.co.uk

toolkit/content/customizeToolbar.js

@@ -143,7 +143,7 @@ function getToolbarAt(i)
  */
 function persistCurrentSets()
 {
-  if (!gToolboxChanged)
+  if (!gToolboxChanged || gToolboxDocument.defaultView.closed)
     return;
 
   var customCount = 0;