RefControl is an app (or website) that allows you to control the way your referrer information is passed to websites. When you click a link on a website, the browser sends a piece of information called a referrer header, which tells the destination website where you came from. By using RefControl, you can customize what information is sent, allowing you to protect your privacy and prevent malicious sites from tracking you. It also enables you to spoof your referrer, allowing you to access content that would otherwise be blocked.
Discontinued No longer updated. The last version, 0.3.7.9.18, released on January 31, 2013, was compatible with Firefox 18.