How To Add A Recovery Key For Firefox Accounts
Firefox Sync is useful in accessing your bookmarks, add-ons, and browsing history across different devices. It uses a Firefox account to encrypt this data and requires a password to sign-in and sync.
So if the password for this account is forgotten, you can still reset it by using a recovery key. This key then would allow all of the Firefox data to be synced again intact like bookmarks and browsing...