U2F support for most sites is already in stable Firefox, you just have to flip security.webauth.u2f in about:config. Unfortunately Google doesn't work yet, mayb

U2F support for most sites is already in stable Firefox, you just have to flip security.webauth.u2f in about:config. Unfortunately Google doesn't work yet, maybe due to missing AppID support: https://bugzilla.mozilla.org/show_bug.cgi?id=1244959 https://bugzilla.mozilla.org/show_bug.cgi?id=1244959