Fix for 87629. Submitted by ben@netscape.com, r=me, sr=alecf@netscape.com.

xpfe/components/bookmarks/resources/addBookmark.js

@@ -188,7 +188,8 @@ function onOK()
       const kLFIID = Components.interfaces.nsILocalFile;
       const kLF = Components.classes[kLFContractID].createInstance(kLFIID);
       kLF.initWithUnicodePath(url);
-      url = kLF.URL;
+      if (kLF.exists()) 
+          url = kLF.URL;
     }
     catch (e) {
     }