I've stuck with Firefox over Chrome because I don't want Google to win the browser. But with most of the signs and some news out of the Mozilla camp having not been good lately, each piece of news nibbles at my ear just a little bit more.
I guess it's a matter of perspective (and of which HN headlines attract your attention :) )
For Windows, on the otherhand, I love Firefox so much. I do fine it's performance and UI so much better. Chrome sucks with lots of tabs open and the UI just bores me.