Use ver. 2.9 -- this one still sucks Rated 2 out of 5 stars
Ver. 2.9 was a five-star add-on. Even the current version, which fixes some of the stuff in 2.15 that infuriated users (including me), still falls far, far, short. There is a completely unnecessary and space-wasting Google search box, which you can't get rid of (to the author -- Firefox already has a searchbar, and it works fine). You can no longer customize the color scheme, which was one of the things I really liked.
Install 2.9, and decline all updates. It's one of the best possible add-ons for Firefox. Or use SpeedDial, but imho it's not as good.