I'm a long-time, hard-core FF user on all platforms and I admit to having used weird extensions. As time goes by, however, I wonder whether it's worth it. Too many websites break because they aren't tested with FF. I wonder whether it'd be a viable way forward if FF forked Chromium and added the excellent rights & extension management on top. That way no more effort would have to be spent on the rendering or browsing engines, end-user experience would improve (as a result of better web page compatibility) but the things we love about FF (extensions) would still be there?