Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Deleted tabs come back when firefox is restarted.

  • 1 reply
  • 2 have this problem
  • 23 views
  • Last reply by cor-el

I keep a lot of tabs open but, once in a while, I go through them and delete any in which I'm no longer interested. Recently they all come back when I re-start firefox.

Help soon please, I now have way too many tabs open.

W10, firefox 131.3 (32 bit)

I keep a lot of tabs open but, once in a while, I go through them and delete any in which I'm no longer interested. Recently they all come back when I re-start firefox. Help soon please, I now have way too many tabs open. W10, firefox 131.3 (32 bit)

All Replies (1)

If you close Firefox immediately after closing the tabs, then try to wait a few seconds (ten or more) to give Firefox more time to update your session data.

You can check for problems with the sessionstore.jsonlz4 file in the Firefox profile folder that stores session data.

  • rename/remove sessionstore.jsonlz4 (sessionstoreOLD.jsonlz4)

You may also have to rename the sessionstore-backups folder.

When sessionstore.jsonlz4 is deleted you lose pinned-tabs and open tabs and you will have to recreate them, so if necessary make a note or bookmark them. sessionstore.jsonlz4 is only present in the Firefox profile folder when Firefox is closed.

You can use the button in "Help -> More Troubleshooting Information" (about:support) to go to the current Firefox profile folder or use the about:profiles page (Root directory).