Privacy has been a concern with the internet since it began.  The Proliferation of social media sites and search engines has accelerated peoples fears about their web browsing history being stored and used without their knowledge.  Now there's a move to allow users an easier way of opting out.

A coalition of Internet giants including Google Inc. has agreed to support a do-not-track button to be embedded in most Web browsers—a move that the industry had been resisting for more than a year.

The reversal is being announced as part of the White House's call for Congress to pass a "privacy bill of rights," that will give people greater control over the personal data collected about them.

Although designers are hopeful that this will allow for confidentiality, critics are quick to point out that it's not a perfect system.

The new do-not-track button isn't going to stop all Web tracking. The companies have agreed to stop using the data about people's Web browsing habits to customize ads, and have agreed not to use the data for employment, credit, health-care or insurance purposes. But the data can still be used for some purposes such as "market research" and "product development" and can still be obtained by law enforcement officers.

The do-not-track button also wouldn't block companies such as Facebook Inc. from tracking their members through "Like" buttons and other functions.

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