I too was an early-ish Firefox proponent, it was way ahead of IE on features (but behind Opera - the ads made opera unattractive to me). The devtools were revolutionary (Firebug!). Somewhere along the way, Mozilla lost momentum/focus - Chrom(e/ium) is what Firefox should have been. Hopefully Mozilla will find it's way again someday soon, for the moment I'm using Chromium- which I switched to primarily for the devtools.