Account sync: account history missing?
Firefox was logged into my account and synced before migrating computer to Azure AD. After installing and logging into the fresh install of Firefox, there is no data associated with the account. It looks as though it was created today, even though I logged into the pre-existing account. I even have emails to this account from over a year ago.
Any way to recover?
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Note that it can take quite some time to finish the initial sync, so you should give this at least one day, especially if you have a lot of data to sync.
Keep in mind that Sync isn't designed to be used as a backup, but merely is meant to sync data between connected devices. Best is always to backup your personal data locally.
- https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
- https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile
You can install the About Sync extension to check what data is stored on the Sync server via the about:sync page provided by this extension.
Close and restart Firefox to access the about:sync page added by this extension (see the about:about page for possible about pages).