It does not work with firefox version 15.0 or above the version of 6.0 Rated 2 out of 5 stars

I know there are tricks to make it work on later versions, but it slows down my browsing , is there any updates to it?I love the themes and function of this. when i updated firefox without this add-on ,my browsing became faster!!..i still love the interface though.
Ive been using it since firefox 3.0 but now when i updated to ff15.0 i stopped but i have kept it on the add-ons disabled . because im keeping my options open for an upgrade of this add on.... :)

This review is for a previous version of the add-on (1.4.5.1-signed).