I have a solokey (solokeys.com) that supports FIDO2/U2F. I can get Dropbox and https://webauthn.me/ https://webauthn.me/ to work with the key in Safari without

I have a solokey (solokeys.com) that supports FIDO2/U2F. I can get Dropbox and https://webauthn.me/ https://webauthn.me/ to work with the key in Safari without any trouble. I cannot get Google or Github to work with the key. I tried changing user-agent string and using Firefox, no luck.