Sooner or later I'll move away from Gmail b/c they make it hard to U2F be used with Firefox. More U2F is the way to go, hopefully everyone supports it in the not too distant future.
Right? The only reason I can see for them making it so hard is to pimp Chrome. Firefox supports U2F, and they know I also have an authenticator app which works with any browser. But no, they have to make it awkward and shove a Chrome ad in my face. Very jarring, and yet another disgusting move from Google (one that has gotten very little press).