As someone who recently switched to Firefox on Linux partially due to performance.. it is really a toss up. Some sites FF renders faster, others Chrome. Chrome does tend to do a bit better on large javascript heavy 'single-page-app' type sites while Firefox crushes Chrome when displaying large (as in lots of text) pages. The latter made reading documentation impossible, such that I always had to use FF for it.

Plus you get the benefit of Firefox not corrupting its session weekly. Losing all your cookies, tabs and history frequently got super annoying.