Do Not Track is a draft W3C specification that defines a method for browsers to tell various Web sites that users do not want to be tracked across the Web by third-party sites or advertisers. Many of the major browser vendors, including Microsoft and Mozilla have implemented the specification, and Microsoft has said that DNT will be turned on by default in Internet Explorer 10, the next major release of its browser. The Senate Commerce Committee will hold a hearing to discuss whether the proposed specification is strong enough or has been weakened by the digital advertising industry s input.
Source: https://threatpost.com/senate-committee-discuss-do-not-track-key-hearing-062812/76746/