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'Restore Previous Session' missing from Menu

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  • 1 has this problem
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  • Last reply by FredMcD

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The so-useful 'Restore Previous Session' choice is now missing from my Menu. Help! I have gone through all of the Firefox troubleshooting measures on this page: https://support.mozilla.org/en-US/kb/restore-previous-session#w_configuring-session-restore, closed Firefox & reopened it (several times), restarted my computer ... but no joy.

In about:preferences#privacy - History, 'Use custom history' is selected, private browsing is NOT checked, Remember browsing and download history & Remember search and form history ARE checked

Windows 10 desktop, Firefox 80.0.1 (64-bit)

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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