I'm glad I've held off on changing my vote for the time being.
I switched to Chrome last week, having grown tired of Firefox's memory usage problems, but was reminded quickly why I stopped using Chrome the first time around last year (Asian font rendering, live bookmarks, Rikaichan's name dictionary, Twitter add-ons). This time, however, I made the necessary modifications, both with add-ons and my own habits, to make for a more comfortable changeover and made up my mind to stick with Chrome.
But then here comes Firefox 4 all of a sudden with a new Chrome-like interface and the promise of better memory usage...and now I don't know which one to stick with!
I'd like to get back to proper fonts and the name dictionary via the new Firefox, but I've already settled myself with ChromedBird and RSS Live Links (plus this forum tends to make my CPU activity go crazy whenever I want to post a reply in FF). I guess I'll be alternating based on my mood now?