Do it now? I use Firefox on all devices, it's completely fine.
Beats ads, as far as I'm concerned, but I can't help but feel like your average user wouldn't agree.
I can't think of a time I didn't have more than one browser, even in 1995 when I made Netscape my default, I kept Cello around for some things. More browsers are better than fewer, not only for the industry, but for individuals too.