(Illustration: Meghan Newell)Īs we described in February, Total Cookie Protection covers not just cookies but a variety of browser technologies that previously were able to be used for cross-site tracking. Now, every website gets its own cookie jar so that cookies can’t be used to share data between them. Previously, third-party cookies were shared between websites. This principle is now enforced in Firefox Private Browsing windows by creating a separate cookie jar for every website you visit, as illustrated here: Firefox’s Total Cookie Protection is a sophisticated set of privacy improvements that enforce a simple, revolutionary principle: your browser should not allow the sharing of cookies between websites.

Traditionally, browsers have allowed websites to share cookies in what is effectively a single cookie jar.

To recap: a cookie is a small piece of data that websites can ask your browser to store on your computer. Now, with Firefox 89, we are extending this same protection to Private Browsing windows. Since Firefox 86, Total Cookie Protection has been available for users who have ETP Strict Mode enabled. In February of this year we introduced Total Cookie Protection, a new, extra-strong protection against cross-site tracking cookies. Cookies can no longer be used to follow you from site to site and gather your browsing history. That means: when you open a Private Browsing window, each website you visit is given a separate cookie jar that keeps cookies confined to that site. Today, with the launch of Firefox 89, we are happy to announce that Firefox Private Browsing windows now include our innovative Total Cookie Protection by default. Unfortunately, for too long cookies have been used by tracking companies to gather data about you as you browse the web.

At Mozilla, we believe that your right to privacy is fundamental.

Disable private browsing firefox