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Firefox no longer allowing me to restore previous session

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  • Last reply by FredMcD

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For the past week the little tab that pops up when I close firefox that reads something like "your previous session closed unexpectedly, click here to restore" has stopped popping up. I am also unable to restore my previous session through the "Restore Previous Session" option in the options. Any advice?

For the past week the little tab that pops up when I close firefox that reads something like "your previous session closed unexpectedly, click here to restore" has stopped popping up. I am also unable to restore my previous session through the "Restore Previous Session" option in the options. Any advice?

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You may have corrupt sessionstore [v56] sessionstore.jsonlz4 file(s). Delete all sessionstore* files and the sessionstore-backups folder.

Type about:support<enter> in the address bar.

Under the page logo on the left side, you will see Application Basics. Under this find Profile Folder. To its right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.

Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder

Linux: Under the page logo on the left side, you will see Application Basics. Under this find Profile Directory. To its right press the button Open Directory.

Locate the above file. Then rename or delete it. Restart Firefox.


Don't delete the files if you need to rescue any data from them, just move them out of the profile folder to some location where Firefox doesn't look for them. You can try to read out their contents using this tool: https://www.jeffersonscher.com/res/scrounger.html