restore closed tabs after updates
In "menu" the "restore closed tabs" option is not available and I am not able to restore with all of my previously opened tabs.
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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.
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: