Marketers are spying on Internet users — observing and remembering people’s clicks, and building and selling detailed dossiers of their activities and interests…..
The Journal analyzed the tracking files installed on people’s computers by the 50 most popular U.S. websites…..
The Journal also built an “exposure index”…..
Install a Firefox Web browser tool to see real-time analysis of the tracking companies that are collecting information on Web pages you visit.Follow the link:
(click on the title to tour the interactive feature..)