My u2f key is already setup and working as the second factor on my google account, and I've used it many times, including using it with this tablet via usb.
I now want to log into my google account in the firefox browser on my galaxy tab a. When I try, I only get the option to enter a backup code.
I checked about:config and security.webauth.u2f is set to true. Security.webauth.webauthn is true. Security.webauth.webauthn_enable_usbtoken is true.
What am I missing here?