Rated 5 out of 5 stars

Please add compatibility with FF13. Other than that — perfect!

This review is for a previous version of the add-on (10.0.1). 

I've uploaded the theme for Firefox 13 beta at http://manuel.mausz.at/coding/ffwin/ and will add it as soon as version 12 has been approved (there's no way to approve multiple versions at the same time).