keepforreview! Bug 9173: Change the default Firefox profile directory to be relative.

Changed bool to boolean for upstream Bug 1881863.

toolkit/xre/nsIXREDirProvider.idl

@@ -24,5 +24,5 @@ interface nsIXREDirProvider : nsISupports
   /**
    * Tells whether the browser has been started in portable mode.
    */
-  readonly attribute bool isPortableMode;
+  readonly attribute boolean isPortableMode;
 };