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Windows 10 bereikte EO (einde ondersteuning) op 14 oktober 2025. Als je Windows 10 gebruikt, lees dan dit artikel.

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

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Where is the info stored when Firefox saved the previous opened windows, after asking "Do you want Firefox to save your tabs for the next time it starts?"?

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Where is the info stored when Firefox saved the previous opened windows, after asking "Do you want Firefox to save your tabs for the next time it starts?"? I what to delete this file, Firefox opens the same 3 windows every time I open Firefox. How can I change this?

Where is the info stored when Firefox saved the previous opened windows, after asking "Do you want Firefox to save your tabs for the next time it starts?"? I what to delete this file, Firefox opens the same 3 windows every time I open Firefox. How can I change this?

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Delete sessionstore.js and sessionstore.bak in the 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.

See:


  • Tools > Options > General > Startup: "When Firefox Starts": "Show my home page" or "Show a blank page"

Save and Quit will only work if you close Firefox via "File > Quit" to close all open Firefox windows.

You can reset the warn prefs on the about:config page via the right-click context menu.

See also http://kb.mozillazine.org/about%3Aconfig