Firefox 22 to Block Third Party Cookies and Ad Tracking Technology

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News Posted: Sun, Feb 24 2013 10:05 AM
Privacy advocates owe a debt of gratitude to Jonathan Mayer, a grad student at Standford who developed a patch for Firefox that, by default, blocks third-party cookies from installing on their browser, thereby protecting users from being tracked by advertisers. Mozilla plans to bake the patch into Firefox 22, which scheduled for release in late June (the current version is Firefox 19).

To get the most out of the patch, and Firefox 22, users are encouraged to clear out all existing cookies when upgrading. The patch doesn't make any special provisions for pre-existing cookies, though it will block new ones from third-parties if the user hasn't visited the site the cookie comes from. Such cookies are used by advertisers to track users and deliver targeted ads.

Third-party advertisers users cookies to track users across the web. Image Source: Flickr (scubadive76)

This is similar to how Safari handles things, which gives permission to first-party cookies, whereby third-party content only has cookie permissions if the content already has at least one cookie set. In short, Firefox 22's handling of cookies is "a slightly relaxed version of the Safari policy," Mayer says.

There shouldn't be much collateral damage in the form of broken websites, but just to be sure, the Mozilla privacy team is "closely monitoring" things before Firefox 22 goes gold.
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rrplay replied on Sun, Feb 24 2013 10:10 AM

Sounds like good news, and will have to stay tuned as to how FF 22 handles them , meanwhile it would not be the first time I had cookies and coffee for breakfast while spending some quality time hanging around here.

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digitaldd replied on Mon, Feb 25 2013 10:02 AM

Hmm I wonder how many websites this will break, I've always turned off 3rd party cookies when ever possible and I usually have to enable them to watch any kind of streaming video on TV station websites. Stay tuned..


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