Study finds Google, Twitter and Facebook keep closest tabs on users

A new study out of Princeton University highlights Google's extensive use of tracking cookies to keep tabs on Internet users and underlines the reasons privacy-conscious people might want to block them.In what may well be the largest study of online tracking to date, the researchers analyzed data from more than a million websites. They discovered that Google Analytics, a tool used to analyze Web traffic that integrates with ad-targeting apps, was embedded in nearly 70 percent of the sites. Along