From Elec­tronic Fron­tier Foun­da­tion: 3rd party adver­tising and tracking firms are ubiq­ui­tous on the modern web. When you visit a webpage, there’s a good chance that it contains tiny images or invis­ible JavaScript that exists for the sole purpose of tracking and recording your browsing habits. This sort of tracking is performed by many dozens of different firms. In this post, we’re going to look at how this tracking occurs, and how it is being combined with data from accounts on social networking sites to build exten­sive, iden­ti­fied profiles of your online activity. · Go to How Online Tracking Compa­nies Know Most of What You Do Online (and What Social Networks Are Doing to Help Them) →