You can use your account recovery key to sign in to your Mozilla account to regain access to your data If you didn’t save your recovery key, you won’t be able to recover your synced data after resetting your password. Mozilla accounts uses your password to encrypt your Sync data (like bookmarks, passwords and settings) on Mozilla’s servers. If you forget your password and have to reset it, this data will be erased for security – unless you have a recovery key. A unique account recovery key allows you to reset your password without losing synced encrypted data. More [https://support.mozilla.org/en-US/kb/how-change-or-reset-your-mozilla-account-password#w_password-reset-without-recovery-key:~:text=How%20to%20change%20or%20reset%20your%20Mozilla%20account%20password Info] But if you could use your old laptop, the passwords might still be '''there'''. If the laptop won't turn on, you can remove the hard drive and put it into an external USB Hard Drive Enclosure or something like that and then you can [[Restore bookmarks, passwords and data from an old Firefox profile]]. [[Profiles - Where Firefox stores your bookmarks, passwords and other user data]] [https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data#w_finding-your-profile-without-opening-firefox:~:text=Finding%20your%20profile%20without%20opening%20Firefox,-Firefox Finding your profile without opening Firefox]