If you like your keyboard shortcuts that (mostly) work across all FF installations across all platforms, go with FF. If you're a Mac-only person, stick with Saf

If you like your keyboard shortcuts that (mostly) work across all FF installations across all platforms, go with FF. If you're a Mac-only person, stick with Safari if you already know it well. Also, FF has extensions which although there are good alternatives on Safari, I sincerely doubt there are as many good quality ones for Safari as for FF.