Mozilla is delaying plans to start blocking third-party tracking cookies in Firefox by default, according to an announcement. The company states that more work is needed for the anti-tracking feature. "The idea is that if you have not visited a site (including the one to which you are navigating currently) and it wants to put a cookie on your computer, the site is likely not one you have heard of or have any relationship with," explains Mozilla's Brendan Eich. "But this is only likely, not always true."
The technology Mozilla is using was developed by a Stanford law student, Jonathan Meyer, and was intended to go into Firefox 22. The possibility of false positives and negatives has postponed launch
without a set deadline, but Eich does say a progress update will be delivered sometime in the next six weeks.