IMO Chrome is great, but Firefox has more features that I like. The minor speed differences are inconsequential and FireFox is faster at some things anyway.
Depending on the site page loading can still badly affect interface responsiveness. There are a number of projects to alleviate this under the umbrella of the Snappy project[1] but for all the work the Mozilla devs have have put into it, Firefox as of now (Fx13) is still nowhere near as smooth as its biggest competitor for regular use cases. I'm hoping that the SuperSnappy research project[2] will produce usable results though.
