Can I roll back the state of my Firefox account?

No. Sync has no "roll-back" points. One set of data, with no backups.

In the event that the passwords information is lost, you should record all information in a separate text file somewhere else on your hard drive, or written down. You can easily copy and paste if you need to do so. If you are concerned about someone else looking at that file, you can compress it using a password.

Look on your desktop. Do you see a folder called; Old Firefox?

https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible

Я храню логины и пароли в отдельном файле, просто меня огорчает сама ошибка в работе синхронизации / I keep my data this way, I'm just upset by the error in sync process

Thank you, anyway))))))

As a fallback, Copy your profile to a safe location. This way, if something goes bad, you still have the backup. If the backup is done each day, the loss of data would be minor.

У меня стоят две системы Windows на компьютере, на обеих одинаковый профиль Firefox Sync. На второй системе, как я потом проверил, все сохранилось правильно, при синхронизации пароли добавляются. Но при возвращении в первую систему, старые пароли при новой синхронизации не возвращаются. Как будто один аккаунт по разному работает на разных системах. Это явная ошибка разработчиков. Как вы думаете, есть ли надежда на исправление проблемы?

If you have sync, and there is a problem anywhere, Shut Down Sync Immediately On All Devices to prevent the problem from spreading. Once the problem is fixed, perform the same repair on all computers before using sync again.

On the 'good' computer, Copy your profile as is to a thumb drive. Then Copy the thumb to the profile on the sick computer. If you are asked to overwrite any files, say Yes.

FredMcD сказал(а)

If you have sync, and there is a problem anywhere, Shut Down Sync Immediately On All Devices to prevent the problem from spreading. Once the problem is fixed, perform the same repair on all computers before using sync again.

---

On the 'good' computer, Copy your profile as is to a thumb drive. Then Copy the thumb to the profile on the sick computer. If you are asked to overwrite any files, say Yes.

По сути так и сделал после проблемы. А так, в целом, оба компьютера были "здоровые" :) У меня один компьютер с двумя Windows ) Просто на Windows 10 сама отключилась синхронизация. Да ладно, спасибо)