Another thread reminded me of the FF version number insanity (from v4 to v15 in about a year).
I think Mozilla has serious organizational problems and FF is bound to die off at some point if it continues. There's no reason at all that Chrome should be better than FF, but I think I must admit that it is-- in terms of speed, etc. That doesn't mean I like its interface or want to use it; I like FF. But the technical quality of FF is really dropping, especially in relation to how other browsers are improving. FF used to be at the top, and now it's barely keeping up.
If Mozilla completely changes strategies, there's no reason FF can't be the best again. But for the moment I do feel like I'm using it while I can until I get tired of it and move to a more modern browser.