Want to know who's spying on you online? There's an app for that

Summary: Mozilla has released a tool that will allow users of the Firefox browser to know which companies are tracking them online.

http://www.zdnet.com/want-to-know-whos-spying-on-you-online-theres-an-app-for-that-7000022447/?s_cid=e539&ttag=e539