I like Lightbeam off Firefox for tracking and getting rid of all the 3rd party connections that leach off all your website roaming going to people post and off-site links and such . It actually shows all the 3rd party's that feed off your browsing .
People have hard time really visualizing how much feeds off you casual browsing . Once you actually can see a Pic. of all the dots connected it is amazing .
For example, here this morning . you visit a website like SHcom . I clicked on 11 links that log-on to different sites . those 11 links ended-up collecting 96 , 3rd party connections .
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