Here's some stats by Futuremark (They make 3dmark)
http://service.futuremark.com/peacekeeper/browserStatistics.action
Chrome IS faster than FF, but speed isn't everything...
I love Firefox for the following reasons:
1) Add-ons (Adblock Plus, Personas, Flagfox)
2) Layout
3) Speed (It IS fast, just because something is a little faster, doesn't mean the competition is slow.)
4) Yeah, that's right, number 4
I tried Chrome, but I don't like it, the flash seemed slow in it for some reason to me.. I don't like the most visited webpages splashpage, and I just don't like the look of it..
So for those reasons, FF FTW