Hi... there has been a substantial code change after the landing of https://bugzilla.mozilla.org/show_bug.cgi?id=398020 which breaks this style. I tried to dabble with it but with no success. Can you please update this. Thanks. It looks great on Vista.
Desi911 said about Native-looking progress meter for Fission ext on Jul 15 2008
achilles said about Firefox 2: Vista-style location bar and search bar on Nov 24 2007