This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

CC Cleaner finds numerous cookies that Firefox doesn't reveal?

  • 3 àwọn èsì
  • 1 ní ìṣòro yìí
  • 27 views
  • Èsì tí ó kẹ́hìn lọ́wọ́ cor-el

more options

Using Self-destructing cookies add-on I have Firefox set to remove all cookies on exit/ close: Custom settings for history unchecked: always use...remember my brow...remember search... Accept cookies from sites (with an exception list that works correctly) Accept third-party cookies: never Keep until: I close Firefox Settings: all checked to clear except site preferences.

I had been noticing a very long list 50-100 cookies identified by CC Cleaner as being on my system that Firefox dis not display. So I began using the Self-destructing cookies add on. The app definitively shortened the list.

However, cookies still remain after closing -- per CC cleaner. Some are api.websitename.com others appear to be flash cookies.

Why are they not being removed? Thank you.

Using Self-destructing cookies add-on I have Firefox set to remove all cookies on exit/ close: Custom settings for history unchecked: always use...remember my brow...remember search... Accept cookies from sites (with an exception list that works correctly) Accept third-party cookies: never Keep until: I close Firefox Settings: all checked to clear except site preferences. I had been noticing a very long list 50-100 cookies identified by CC Cleaner as being on my system that Firefox dis not display. So I began using the Self-destructing cookies add on. The app definitively shortened the list. However, cookies still remain after closing -- per CC cleaner. Some are api.websitename.com others appear to be flash cookies. Why are they not being removed? Thank you.

Ọ̀nà àbáyọ tí a yàn

They could be cookies auto-generated when Firefox first starts up. Or cookies generated by your add-ons. So they necessarily do not belong to the webpages but the browser itself.

Ka ìdáhùn ni ìṣètò kíkà 👍 0

All Replies (3)

more options

Ọ̀nà àbáyọ Tí a Yàn

They could be cookies auto-generated when Firefox first starts up. Or cookies generated by your add-ons. So they necessarily do not belong to the webpages but the browser itself.

more options

Thank you for your time and courtesy of a reply. I believe you are correct or perhaps they are "session" cookies used to restore Firefox after a crash.

more options

You may have installed an extension that maintains a set of special OPT-OUT cookies if you can't remove some cookies permanently.

In that case you need to uninstall the extension to remove those opt-out cookies.

Possible candidates: