Try one of these articles:
- Enable and disable cookies that websites use to track your preferences Websites store things like your preferences and login status in "cookies" on your computer. This article describes how to enable and disable cookies in Firefox.
- Delete cookies to remove the information websites have stored on your computer Websites store information such as site preferences and login status in "cookies" on your computer. This article describes how to delete cookies in Firefox.
- Disable third-party cookies in Firefox to stop some types of tracking by advertisers Some advertisers use these types of cookies to track your visits to the various websites on which they advertise. This article explains how to disable them.