Personal reasons why I'm using Chrome right now instead of Firefox: Chrome is faster, or feel faster, why I don't know, but it seems to perform better on low end gear. It starts fast and most pages don't seem to "block" while loading. Second, I despise Firefox dev tools, period. I hate the console input being stuck in on a single line, this isn't how most CLI UI work, so why does it make sense for Firefox to do that? it doesn't.
Obviously since Google started pulling that "logged in Gmail == logged in Chrome" stupid stunt, I want to move away from Chrome, but Firefox will seldom be my first choice as an alternative.
Have you made any attempts to try out the new Firefox Developer Edition? They've done some revamping recently of the Dev tools (to the point that, yes, multi line is supported in the console)
Obviously since Google started pulling that "logged in Gmail == logged in Chrome" stupid stunt, I want to move away from Chrome, but Firefox will seldom be my first choice as an alternative.