Change you Firefox skin in Vista Skin...(Firefox Vista Themes)
This package contains 58 extensions to boost your productivity including custom extension images and a custom FoxyTunes skin made for Internauta2000's Vista-Black theme that gives your browser a cleaner look without losing functionality.Firefox Vista Themes
You can install any of these extensions seperatly or all at once. Vista-Black theme included.
I also recomend the following Greasemonkey Scripts...
Gmail Conversation Preview
Gmail - Zip Attachments and Download
Gmail + Reader Integrator
Googlenlarge
and the following Stylish scripts...
about:Blank Blue Firefox
Gmail with different and bigger attachment icons
Google Image Search - dark gray redesign (vC)
Google Video - dark gray redesign (vC)
Google Web Search - dark gray redesign (vC)
YouTube.com - dark gray redesign (vC)
Download Firefox Vista Themes: 13.3 MB
http://rapidshare.com/files/119955545/M_Firefox_Ext_Vista_Theme.rar
