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How to open sessionstore-backups in firefox to restore the tabs of the session before the previous one and before that ?

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I have tried to restore the previous session by clicking menu history and restore the previous session but then i found out that this is not the session im looking for ,so how to restore the before session ,i have read that i need to open the tabs from the folder sessionstore-backups and i have no idea on how to do that..

Thank you for helping with every single detailing..

I have tried to restore the previous session by clicking menu history and restore the previous session but then i found out that this is not the session im looking for ,so how to restore the before session ,i have read that i need to open the tabs from the folder sessionstore-backups and i have no idea on how to do that.. Thank you for helping with every single detailing..

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Firefox only keeps a copy of the previous session. If you need to access older sessions then you should use an extension like Session Manager. Firefox automatically creates a backup of the current session when you update Firefox, so you can check whether the update created by the latest update has the tabs that you are looking for.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.


Firefox uses the sessionstore.js file in the profile folder to store session data. The sessionstore.js file is only present when Firefox is closed. The sessionstore.js file is created from recovery.js when you close Firefox and is removed and copied to previous.js when you start Firefox to make is possible to restore the session at any time.

Backup the session files in the sessionstore-backups folder in the Firefox Profile Folder to make sure not to lose possible important session data. Do NOT close Firefox when Firefox is already running.

You will normally find these files in the sessionstore-backups folder:

  • previous.js (cleanBackup: copy of sessionstore.js from previous session that was loaded successfully)
  • recovery.js (latest version of sessionstore.js written during runtime)
  • recovery.bak (previous version of sessionstore.js written during runtime)
  • upgrade.js-<build_id> (backup created during an upgrade of Firefox)

You can copy a file from the sessionstore-backups folder to the main profile and rename the file to sessionstore.js to replace the current file (make a backup copy of the current sessionstore.js).

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