FIDO U2F issue

Hi,
Using a Yubikey for FIDO U2F has been broken since 110.01 and still broken on 111.0

Works fine in 'Full Fat' Chrome and allegedly works on in 'Full Fat' Firefox (not tested it personally but Yubico Support Team have)

Can fallback to OTP via the Yubikey but FIDO U2F is much more convenient and has worked fine for several years on previous builds of FF Portable.

A fix would be great