Enable Do Not Track request in Mozilla Firefox.

Mozilla foundation believes in open Internet and is a strong supporter of Internet Freedom and Privacy. In order to prevent the user being tracked by cookies, Firefox has introduced "Do Not Track" feature in its browsers.

To enable this feature, go to Firefox > Options > Privacy, or press "Alt" + "T" + "O" to open Firefox Options and go to Privacy tab and check "Tell sites that I do not want to be tracked" or press "Alt" + "N" or choose your preference and press "OK".