Firefox Tekoha Aty

I am having a problem with Firefox losing or not updating some saved passwords. It has always worked seamlessly in the past, but in the past couple of weeks (January 2025), several sites that I regularly visit and have saved passwords for (nothing financial; I never save that stuff) have not auto-populated the password field and I have had to change passwords. I did this on one site a couple of days ago, using my mobile and tablet (both Firefox web browsers), but when I went to log in to that site on my desktop Firefox browser today, it had not updated the password, and even when I typed in the new password, Firefox did not offer - as it normally would - to update the saved password. I was logged in to Firefox at the time, so my account was live. Anyone else having this problem? Or know why it's happening?

I have a handful of different reddit accounts. Each has its own password and they're all saved in Firefox's default password manager.

Say I'm logged out and go to log in. If I click on the first field, which is "Email or username," I'm given only two options: one is my email and the other is one of the usernames. If I click on the second field, which is "Password," I'm given all the passwords I've saved.

Obviously, when I click on "Email or username", I want all the saved usernames to appear. If I could select a password and that would auto-fill the appropriate username, that would be almost as good, but that doesn't work either.

What's most mysterious is that in the saved password list, Firefox doesn't have any information associating my email with reddit specifically. And the one username that I have the option to select is always the same one, and I don't know why it's that one in particular. It's not the oldest, or the newest, or the most recently used.

Any help would be appreciated!