It has always been relevant for me. Chrome has nowhere near as powerful customization and privacy features, and Opera has nowhere near as much support. Firefox has always been the best browser for both power users and privacy conscious people.

If you were going for something minimalistic and good for business/home usage, Chrome might be a better choice indeed. I can definitely see the advantages and I've installed it for my family back when it was substantially faster than Firefox (by now Chrome got a lot heavier and Firefox, uh, I guess they must have become a bit lighter but I don't know). I guess I should switch them back to Firefox again, but it might not be worth the learning curve.