My son use thunderbird with a gmail account, and eversince Windows 10 update he can't access his account with thunderbird just won't accept his password. I know when you set up an imap with TB it then goes to gmail for permission and it just freezes.
i have told him he can see gmail through his browser but he has got used to TB and prefers that!
I've searched for an answer and it seems hard to try and find an answer, tried TB help and it gives you account to log into but doesn't give you option to open an account. So can't ask buggzilla.