Firefox 57 gained[1] more U2F support in Firefox 57. It relies on u2f-hid-rs[2] which hasn't been ported to FreeBSD. I'm not sure if Chromium supports U2F on FreeBSD but if no one helps Firefox won't as well. Note, U2F Support Add-on doesn't work in FF57. [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1245527 [2] https://github.com/jcjones/u2f-hid-rs