--- webfm.js			2008-04-08 08:28:14.000000000 +0200
+++ webfm.js.clipboard_warning	2008-04-18 14:27:18.000000000 +0200
@@ -3667,7 +3667,12 @@
   } else if (window.netscape) {
   	// You have to sign the code to enable this or allow the action in about:config by changing
     // user_pref("signed.applets.codebase_principal_support", true);
-  	netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
+      try {
+        netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
+      } catch (e) {
+        alert("You need set 'signed.applets.codebase_principal_support=true' at about:config");
+	return false;
+      }
 
   	var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
   	if (!clip) return;
+