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Lost Firefox info after upgrading O/S on MacBook. & Can't find Moxilla account password

Upgraded my Monterey O/s on Macbook. Lost all my history and passwords. Cannot find original password for account or retrieve my previous Firefox settings. help

Upgraded my Monterey O/s on Macbook. Lost all my history and passwords. Cannot find original password for account or retrieve my previous Firefox settings. help

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Your Firefox account password is used for the encryption keys of your data, so unfortunately if you can't find your password, nobody can help you retrieve your data, even if they wanted to. You can reset the password of your Firefox account, but that permanently destroys all of your saved data. Do you have your recovery codes by any chance?

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