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Firefox crashed and now the "Restore Previous Session" option is greyed out

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  • 14 have this problem
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  • Last reply by cor-el

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I tried about:sessionrestore as well, but my windows and tabs didn't show up there either.

I tried about:sessionrestore as well, but my windows and tabs didn't show up there either.

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It is possible that there is a problem with the files sessionstore.js and sessionstore.bak in the Firefox Profile Folder.

Delete the files sessionstore.js [2] and sessionstore.bak in the Firefox Profile Folder.

If you see files sessionstore-##.js with a number in the left part of the name like sessionstore-1.js then delete those as well. Deleting sessionstore.js will cause App Tabs and Tab Groups and open and closed (undo) tabs to get lost, so you will have to create them again (make a note or bookmark them).

See also:


See also: