Firefox add-on shows who's tracking you online

For the most part, the ad networks and analytics companies and other online trackers that watch as you plod across the Internet are silent sentinels. Sure, they get debated on Capitol Hill and in magazine articles, but it’s pretty easy to forget about them. They’re distant, abstract, like the Greek debt crisis or loose nukes in Russia. We know we should care, but who has the time?
Do Not Track is a step toward putting you in control of the way your information is collected and used online. Do Not Track is a feature in Firefox that allows you to let a website know you would like to opt-out of third-party tracking for purposes including behavioral advertising. It does this by transmitting a Do Not Track HTTP header every time your data is requested from the Web...........
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