Everytime I get fed up with Google's spying on everyone, I try Firefox again. Each time I end up going to Chrome simple because Firefox runs so much visibly slower, and crashes much more often.
No idea what are you talking about: Firefox is as fast for me and I can not remember it crashing.
No, GP is right. Unless you're on a stupidly fast computer, Firefox is noticeably more sluggish than Chrome. The UI renders more slowly, tabs pop open more slowly, pages load more slowly. Of course, in comparison, Internet Explorer is a somnolent beast, dropping my keystrokes and taking an eternity to switch tabs.
Also, Firefox crashes plenty of times. With Firefox as my browser, I'm actually using other programs for other tasks: Thunderbird for my Gmail, Pidgin for my Facebook Messenger, Chrome for my other interactions with the Rainbow Borg, Internet Explorer for my other interactions with Facebook and other evil corporates.
However, the delayed loading of tabs on session restore has made Firefox crashes much less painful than Chrome crashes. I used to dread restarting Chrome, because of the large CPU and network hit as every tab reloads, but now I'm much calmer when Firefox restarts.