I was using Mozilla Firefox and I had around 600 tabs on Onetab but suddenly all the tabs got lost and only tabs of yesterday were there. Through some links I found that backup is stored in restore.js file in Windows but where is this file in Ubuntu.

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    are you sure? I thought it was sessionstore.js for the current session when you close firefox and recovery.js when firefox crashed. – Rinzwind Feb 12 '18 at 8:35

in ~/.mozilla/firefox/your_profile/ you can find

  • sessionCheckpoints.json
  • sessionstore.jsonlz4

and the directory sessionstore-backups

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