How to enable or disable cookies
in Mozilla Firefox, posted Oct 25th 2011
Enabling and disabling cookies in Firefox is a fairly simple task once you know how to do it. Some websites may not function properly if cookies are disabled, but disabling cookies is a way to ensure no website leaves any data on your system.
To enable or disable your cookies, click on the "Tools" menu in the menu bar at the top of your browser window and then select "Options"; if you're not using the menu bar, click on the "Firefox" button at the top-left corner, and then click on "Options".
A dialog titled "Options" will appear, so select the "Privacy" tab at the top of that dialog; in the "History" section you'll you can change the drop down next to "Firefox will" to "Use custom settings for history", and once you've done that you'll see a series of checkboxes to customize how Firefox will handle your history, including the option to enable or disable cookies; you also have the option to disable just third party cookies, which are the ones that are mostly used to track your activity across websites. So, you may check or uncheck those options to enable or disable cookies, and then you can save the changes with the "OK" button at the bottom of the dialog.