Best Cookie Manager Anywhere Rated 5 out of 5 stars

This is a very easy to use plugin for managing and blocking cookies. User dtrz requests below to be able to block cookies by default, but this is already in the plugin! Simply click the Firefox button then -> Addons -> Extensions -> Cookie Monster -> Options. Once in options, in addition to the boxes already checked, check: Block All Cookies; Delete Cookies When Changing access to Deny. Now Cookie Monster will block all cookies by default! It also has a Temporarily Allow Cookies option that I use quite often. Additionally, if you're concerned with privacy be sure to install the Ghostery plugin available from Mozilla and the HTTPS-Everywhere plugin available from the EFF.

This review is for a previous version of the add-on (