I like that I can completely rebuild the UI however I want. I also find tab thumbnails to be a nice productivity boost, totally worth the vertical space they t

I like that I can completely rebuild the UI however I want. I also find tab thumbnails to be a nice productivity boost, totally worth the vertical space they take up (to enable them, just drag the bottom of the tab bar down). The native mouse gesture implementation seems snappier than the Firefox plugin I tried (haven't tried in Chrome). tl;dr: Features and configurability. That said, Chrome has its own strengths; it's a good browser, and it's the one I use on the rare occasion that something doesn't play nice with Opera.