The add-on ecosystem of Chrome currently dwarfs Firefoxes. Firefox extensions used to be more capable, but there's just more and certainly more NEW ones for Chrome.
(I'm sure this was an important consideration for Mozilla as well - it reduced the supposed value of their "more powerful" XUL extension system, as in practice you can often find a Chrome extension to do what you want, but not a Firefox one)
(I'm sure this was an important consideration for Mozilla as well - it reduced the supposed value of their "more powerful" XUL extension system, as in practice you can often find a Chrome extension to do what you want, but not a Firefox one)