Mozilla bakes cookie protection right into Firefox 86

Mozilla Firefox
Mozilla Firefox (Image credit: Mozilla)

What you need to know

  • Mozilla recently announced a privacy feature called "Total Cookie Protection."
  • The feature creates separate "cookie jars" for each website you visit.
  • This cookie jar setup prevents sites from tracking you across the web.

Total Cookie Protection is built into Firefox's ETP Strict Mode. Mozilla describes it in a blog post:

Our new feature, Total Cookie Protection, works by maintaining a separate "cookie jar" for each website you visit. Any time a website, or third-party content embedded in a website, deposits a cookie in your browser, that cookie is confined to the cookie jar assigned to that website, such that it is not allowed to be shared with any other website.

Mozilla Cookie Jar

Source: Meghan Newell via Mozilla (Image credit: Source: Meghan Newell via Mozilla)

Firefox doesn't just block every single cross-site cookie, though. Mozilla cleverly created exceptions for when you need cookies for non-tracking purposes, including third-party login providers. The browser can detect when you want to use a login provider and then specifically allow it for a site you're on.

This setup means that your browsing experience shouldn't be hampered but that cookies you don't want tracked across sites will be isolated within their respective cookie jars.

The new Total Cookie Protection feature, when used in conjunction with Firefox's Supercookie Protections should improve your browsing privacy significantly. Total Cookie Protection isn't turned on by default, but you can easily switch it on.

There are also extensions to block cookies, but this new feature is baked right into Firefox.

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Sean Endicott
News Writer and apps editor

Sean Endicott is a news writer and apps editor for Windows Central with 11+ years of experience. A Nottingham Trent journalism graduate, Sean has covered the industry’s arc from the Lumia era to the launch of Windows 11 and generative AI. Having started at Thrifter, he uses his expertise in price tracking to help readers find genuine hardware value.

Beyond tech news, Sean is a UK sports media pioneer. In 2017, he became one of the first to stream via smartphone and is an expert in AP Capture systems. A tech-forward coach, he was named 2024 BAFA Youth Coach of the Year. He is focused on using technology—from AI to Clipchamp—to gain a practical edge.