I have an account with Mozilla. I just built a new PC and installed Ubuntu 2024. On that machine when I try to login with my current primary email address it tells me that the account doesn't exist and prompts me to create a password. At some point I figured it might be possible to just push through, so I did create a new password. But I am not getting a confirmation email for an account that already should have existed.

Why did my new pc not find my Mozilla account when I gave it my email? How do I now fix this broken login?