Mozilla today launched its latest privacy feature with Firefox 86 for Mac, Windows, Linux and more, called “Total Cookie Protection”. The new privacy option creates separate cookie pots for each website you visit to avoid cross-site tracking.
Mozilla detailed the new Firefox feature on its security blog today:
Our new feature, Total Cookie Protection, works by maintaining a separate “cookie jar” for each website you visit. Whenever a website, or third party content embedded on a website, deposits a cookie in your browser, that cookie is confined to the cookie jar assigned to that website, so it cannot be shared with any other website.
The new security feature is part of Firefox’s Advanced Tracking Protection (ETP) Strict mode. But cross-site tracking exceptions are supported:
In addition, Total Cookie Protection makes a limited exception for cross-site cookies when they are required for non-tracking purposes, such as those used by popular third-party login providers. Only when Total Cookie Protection detects that you intend to use a provider, will it give that provider permission to use a cross-site cookie specifically for the site you are visiting. These momentary exceptions allow for strong privacy protection without affecting your browsing experience.
Total Cookie Protection comes after Mozilla launched Supercookie Protections in January with Firefox 85. The nonprofit says that “Together, these features prevent websites from” tagging “your browser, thereby eliminating the cross-crawling technique more widespread ”.
For a technical analysis of how Total Cookie Protection works, you can read the Mozilla developer document here.
Firefox is a free download for Mac (Windows, Linux, Chrombook, too).
Apple includes cross-site crawl prevention in Safari for Mac and iOS that first arrived with macOS Mojave and iOS 12. And, of course, since then, Apple has started to further restrict device tracking with the release of the feature Ad Tracking Transparency on iOS 14 in “early spring. “
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