Browser Tools Can Help Block Tracking by Social Networks

Those small buttons on Web sites that are designed to let you share what you’ve read with your social networks have an equally important function: They let the social networks track your travels on the Web, whether or not you click on them. Now, there are a growing number of start-ups offering tools that help consumers keep that kind of tracking at bay.Social “widgets,” as they are called, have proliferated across the Web: a “like” button from Facebook or a cheery blue bird from Twitter. They act as eyes on the Web. They watch you as you read the day’s news, say, or research health information, or shop for rain boots.

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