For Apple users (MacOS, iOS), I would suggest Safari over Firefox as FF is the most hacked browser and very unsafe. On the other hand, Safari syncs bookmarks, tabs on all your Apple devices very seamlessly.
I use Firefox as my "virgin" broswser for testing or when I need to manually override proxy settings for my own MitM purposes. But that's about it.
[citation needed].
Firefox has sync to all devices too.