Ars Technica, February 8, 2011
By Ryan Paul

Mozilla has rolled out an eleventh beta release of Firefox 4, the next major version of the browser. The new beta adds support for a "Do Not Track" setting. The implications of behavioral advertising are a growing source of concern among privacy advocates. In an effort to appease regulators, the most prominent Internet advertising companies voluntarily offer a cookie-based opt-out service. It's a good start, but Mozilla sees a lot of room for improvement.

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