I used Chrome for about 2 days before switching back to FF. The only thing speed-wise about FF that's annoying is boot-up...after that pages load just as fast as Chrome for me.
Oh, and add-ons are a huge freaking deal, in terms of awesomeness.
Chrome has extensions too. Nowhere near the selection, but all you really need is Adblock. What add ons do you desperately need? Foxy Tunes? The one that tracks what woot.com is selling? My biggest annoyance of Firefox is the aesthetics. Compared to Chrome, it takes up a lot more screen space and is ugly as hell. The screen space affects me most, because when I work I have to squeeze the window down quite a bit. Only 2 22" monitors :(
Fringe case...not everyone is an archie.
I use Better Gmail, UnPlug, Surf Canyon, Tab Mix Plus, Xmarks, off the top of my head. And that's just because I haven't taken the time to explore the myriad other awesome add-ons there are.
Chrome, being so bare-boned, has only one supposed advantage I was looking for: speed. And upon further review, I noticed no browsing speed difference between Chrome and FF.
SD, we're talking about the thingy that allows you to look at the interwebs, fyi!