I have tried both Google Authenticator and Guardian for use with Mozilla 2FA. I have tried scanning the QR code on my PC multiple times on each authentication app and retrieving multiple codes each time, but all entries stated "incorrect 6 digit code" on my PC to enable 2FA. I am not sure how this is not working. Both authenticator apps identified my correct login email address associated with my Mozilla account so I know it must have something to do with whatever is happening on the back end at Mozilla for my account.

Also, I have read a few posts in the Mozilla support knowledgebase regarding this very same issue, but did not see any resolution. I would really like to have 2FA. Can someone please contact me about this?