Tried Firefox 3.6 in middle of last week. I am so impressed by the performance as well as look and feel that I upgraded all my desktops (including the primary one running OpenSolaris) with this release over the weekend. If you haven’t tried already, try Personas on Firefox. I installed Personas Plus and having lot of fun. The foxmask on the bottom left corner has become a regular visiting place now a days, to check the latest Personas.