What do you mean by extension heavy? In my experience, Firefox has the best extension ecosystem amongst all browsers. It took them quite long to get that to work on mobile, but even there you could use all extensions already on a developer build for years.
Especially with the manifest v3 changes, which will basically break adblockers on Chrome-based browsers, I can't imagine ever using something else than Firefox.
Especially with the manifest v3 changes, which will basically break adblockers on Chrome-based browsers, I can't imagine ever using something else than Firefox.