I really see no reason to move from Chrome. Unless it slows down in the future or something I'll pretty much stick with it.
I think it was IE7 I was using when I switched to Firefox. IE7 (I think that was the one) was horrendously slow and had these annoying toolbars added on that I had never agreed to. Firefox was like a dream after being stuck with IE for years. Then along came chrome. Oh baby.