Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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

Third-party cookies are automatically enabling after I have disabled them. Virus?

  • 1 vastus
  • 3 on selline probleem
  • 1 view
  • Viimati vastas cor-el

more options

Though I normally run Firefox on private mode, and do accept cookies but never from third parties, I seem to have somehow ended up with a virus or something that automatically changes these settings every time I use Firefox. No matter how often I uncheck the box next to 'accept third party cookies' and click 'okay' the next time I go into the privacy setting box it will be checked again. How do I fix this???

Though I normally run Firefox on private mode, and do accept cookies but never from third parties, I seem to have somehow ended up with a virus or something that automatically changes these settings every time I use Firefox. No matter how often I uncheck the box next to 'accept third party cookies' and click 'okay' the next time I go into the privacy setting box it will be checked again. How do I fix this???

All Replies (1)

more options

This issue can be caused by an extension that isn't working properly.

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).

If settings change after closing and restarting Firefox then see: