Firefox to follow Safari, start blocking cookies from third-party advertisers

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Firefox is set to start blocking cookies from third-party ad networks by default, thanks to a patch submitted by Stanford law student and online privacy activist Jonathan Mayer. The patch is slated for distribution in release 22 of the popular browser, and mimics the behavior of Apple’s Safari, allowing sites that you’ve actually visited (first parties) to set cookies on your system, but blocking cookies from third parties like advertising networks unless they already have one on your machine. Firefox already supports the Do Not Track header, which has the effect of asking advertisers not to track your browsing around the web, but Mayer’s patch goes a step further, adding a default setting that refuses unwelcome third-party cookies…

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