FF has become slow as ****. It got to the point where I really couldn't care less what they have to offer.
I've been loyal to FF for as long as I can remember. But admittedly the browser has become terrible. Its slow, it constantly crashes, its a resources hog and it keeps shitting updates on users every week and nothing gets fixed.
Three weeks ago I installed Chrome and I have seen the light. Its blazing fast compared to FF and way more stable and optimized. Granted there are a couple of FF features I miss but they wouldn't ever justify sticking with or going back to FF at this point.