Rated 5 out of 5 stars

Stylish Update Version 1.2.1
Works with:
Thunderbird 5.0 - 6.*
Firefox 3.6 - 7.0a2
SeaMonkey 2.0 - 2.2.*

https://addons.mozilla.org/en-US/firefox/addon/stylish/versions/

This review is for a previous version of the add-on (1.2.1-signed).  This user has a previous review of this add-on.