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Delete cookies and site data when Firefox is closed not working

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  • Last reply by zeroknight

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Delete cookies and site data when Firefox is closed tab is checked so it should delete cookies, but it doesn't, and when I click on manage data there are still cookies etc. How can I make this automatically delete?

Delete cookies and site data when Firefox is closed tab is checked so it should delete cookies, but it doesn't, and when I click on manage data there are still cookies etc. How can I make this automatically delete?

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You need to check this in the "Clear history when Firefox closes" settings as that is what matters.

  • using "Clear history when Firefox closes" in Firefox 102+ honors exceptions and keeps cookies with an allow exception, previous versions removed all cookies
  • clearing "Site settings" clears exceptions for cookies, images, pop-up windows, and software installation and exceptions for passwords and other website specific data
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Are all cookies being retained across sessions or only some? If you click on "Manage Exceptions", do you see any sites listed there?

Are you closing all Firefox windows? Quit from the menu (Ctrl+Shift+Q) to make sure it properly exits.

Does it still happen with all your extensions disabled?