Mozilla begins baking new patch to kill tracking cookies

Mozilla begins baking new patch to kill tracking cookies

Summary: A new patch for Firefox is now being tested by Mozilla and could see third party cookies banned from being installed if a user hasn't directly visited the cookie owner.

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TOPICS: Privacy, Security
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Mozilla has begun to experiment with a new patch for Firefox, which changes whether cookies from third parties are allowed.

Citing Safari as its driving force behind the new approach, the patch will require users to "directly interact with a site or company for a cookie to be installed on their machine".

Currently, a site might call upon elements from other sites, such as advertising units, which in turn store cookies on the user's computer. These can then be recalled at a later date or time to gain an insight into user habits.

Mozilla's new patch means that these third party cookies will not be permitted on the user's computer unless they take the time to visit the third party site directly.

Mozilla Global Privacy and Public Policy Leader Alex Fowler has been testing the release and found that in a morning's worth of browsing a few news sites, the new patch blocked over 300 third party cookies without any ill effect.

"I cleared all my cookies before visiting these sites, and then re-performed this process several times as I wanted to verify that, in fact, four sites did lead to over 300 cookies from more than 100 companies I had not visited. Display ads and sharing widgets on the sites worked fine, and as I clicked on them, the various parties involved were able to set cookies," he wrote on the Mozilla privacy blog.

The new patch is currently only available in the early developer builds of Firefox, and Fowler expects it will take several months of community and user feedback before it makes an appearance in the beta and general releases of Firefox.

Those wishing to test the early build can download the "Firefox Nightly" build.

Topics: Privacy, Security

Michael Lee

About Michael Lee

A Sydney, Australia-based journalist, Michael Lee covers a gamut of news in the technology space including information security, state Government initiatives, and local startups.

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4 comments
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  • How about google analytics cookies

    Does this patch block these google cookies as wel or are mozilla sponsors exempt?
    IE11
    • Re: How about google analytics cookies

      It treats them exactly the same as Microsoft Internet Explorer treats them.

      Does that answer your question?
      ldo17
  • The irony is, or course...

    ...that Netscape (the commercial predecessor of Mozilla) invented cookies.
    John L. Ries
  • Running Nightly build and Collusion...

    ...still lists dozens of unvisited sites (eg facebook, linkedin, doubleclick etc), although they don't show up in the Firefox Cookies list for some reason ?
    SteveRogers1