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"Manage Exceptions" re: "Delete cookies and site data when Firefox is closed"

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In about:preferences#privacy, I've checked "Delete cookies and site data when Firefox is closed". I would like to "Manage Exceptions" but what I set there does not persist when Firefox is re-launched. What am I doing wrong ?

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Sorry, no response.

Athraithe ag TerryN21 ar


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Exceptions are stored as part of the Site Preferences, so it looks that you clear the SP when you close Firefox.

In case you use "Clear history when Firefox closes" or otherwise clear history.

  • do not clear the Cookies
  • do not clear the Site Preferences
  • clearing "Site Preferences" clears exceptions for cookies, images, pop-up windows, and software installation and exceptions for passwords and other website specific data
  • clearing "Cookies" will remove all cookies including cookies with an allow exception you may want to keep


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