Hey there!

Please view the following :

How to restore previous session: https://support.mozilla.org/en-US/questions/1207617 https://support.mozilla.org/en-US/questions/1004076

How to restore tabs from last time: https://support.mozilla.org/en-US/kb/how-do-i-restore-my-tabs-last-time

Hope I helped!

Kind regards,

Bithiah

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

Firefox turned off by itself and an error window appeared with the button whether I want to restore the previous session. I clicked restore sessions and a window was displayed that firefox is updating. Then firefox turned on the default start page and then I wanted to restore the previous session with the button in the "history" bar and there was no such possibility. The button did not light up.

Hey there!

If you want to restore your previous session please see the following link on how to do so:

https://support.mozilla.org/en-US/kb/restore-previous-session

Hope I helped!

Kind regards,

Bithiah

Thank you for all the answers. Problem solved.

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution.

Thank you for contacting Mozilla Support.