Yubikey FIDO usage in firefox

about

In firefox yubikey using FIDO with PIN (CTAP2) is not supported by default.
THis causes issues when trying to authenticate to a service that requires this.
The window either errors out or just "hangs"
The fix for this is to enable some settings in Firefox´s about:config

Implementation

open about:config in the address bar in Firefox
Search for webauth, and set these 2 keys to true (the default is false)

security.webauthn.ctap2 = true
security.webauth.u2f = true