# Summary We would like to enable State Partitioning[1] in private browsing windows. State Partitioning has been enabled in Strict Mode since Firefox 86[2] to provide better protection against trackers. Now, we want to expand the protection to the private browsing mode so that more users could benefit from State Partitioning.
We use the cookie behavior to decide if State Partitioning is enabled in Firefox. We used to have one single pref to control the cookie behavior for both regular and private browsing mode. To enable State Partitioning in private mode, we will introduce a new pref “network.cookie.cookieBehavior.pbmode” to control the cookie behavior in private browsing mode. By doing this, we can control the cookie behavior individually and enable State Partitioning in private browsing mode without affecting regular mode. Our current plan is to enable State Partitioning in private mode in Firefox 89. And it is expected to ride the trains. Previous intent to prototype is here: https://groups.google.com/g/mozilla.dev.platform/c/f2_hLdfsbq4/m/ZhuWE4ZAAgAJ?pli=1 # Bug https://bugzilla.mozilla.org/show_bug.cgi?id=1698810 # Standard https://github.com/privacycg/storage-partitioning/ Note that this spec is still a work in progress. # Platform coverage All # Preference network.cookie.cookieBehavior.pbmode # DevTools Bug None # Other browsers Chrome: Chrome blocks third-party cookies in incognito mode. Safari: Safari blocks all third-party cookies by default. Thanks, Tim [1]: https://hacks.mozilla.org/2021/02/introducing-state-partitioning/ [2]: https://blog.mozilla.org/security/2021/02/23/total-cookie-protection/ _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
