Hi, If you are logged into any of the sites when you press "Forget about History" it should delete all cookies but it is possible that since logged into sites it is keeping them. Not a bug or a feature, just a glitch I would think and also possible how your settings for cookies are in Options-->Privacy & Security--> History. Suggest review your settings there and experiment to what works for you. I have no cookies once I close Firefox other than the ones I have adjusted for and accepted, then have made changes again there. I need to do this each time I want special cookies for features or logins. So there are many combinations you can have and do and this maybe the reason "Forget..." is not working as you wish it to. Test and let us know if need further help.

Do you meant this button?

• https://support.mozilla.org/en-US/kb/forget-button-quickly-delete-your-browsing-history

cor-el said

Do you meant this button?

• https://support.mozilla.org/en-US/kb/forget-button-quickly-delete-your-browsing-history

Yes, that's the one.

Pkshadow said

Suggest review your settings there and experiment to what works for you.

I had "Always use private browsing mode" enabled. I changed it to costum settings with "clear (all) history when FF closes". Now the "forget..." button works as it should.

kpj375 said

Pkshadow said

Suggest review your settings there and experiment to what works for you.

I had "Always use private browsing mode" enabled. I changed it to costum settings with "clear (all) history when FF closes". Now the "forget..." button works as it should.

That makes sense. In Automatic Private Browsing mode, cookies are held in memory in a "private windows" cookie jar. I guess the regular controls for clearing history and cookies don't apply.