As a user, I've always thought FF (and its predecessors) was bloated, slow, buggy, and annoying. As a developer, the only good thing I have to say about it is "At least it's not IE." I'm very glad to not be stuck on Windows.
I've tried Chrome and found it (on a Mac) to have no advantages for me over Safari. i find the combined address/search bar annoying. They are two different things. It costs me more time than it saves, though I could see that being different for people who use the mouse more.