State Partitioning is the technical term for a new privacy feature in Firefox called Total Cookie Protection, which will be available in ETP Strict Mode in Firefox 86. This article shows how State Partitioning works inside of Firefox and explains what developers of third-party integrations can do to stay compatible with the latest changes.

Web sites utilize a variety of different APIs to store data in the browser. Most famous are cookies, which are commonly used to build login sessions and provide a customized user experience. We call these stateful APIs, because they are able to establish state that will persist through reloads, navigations and browser restarts. While these APIs allow developers to enrich a user’s web experience, they also enable nefarious web tracking which jeopardizes user privacy. To fight abuse of these APIs Mozilla is introducing State Partitioning in Firefox 86.

The Firefox web console used to include a cd() helper command that enabled developers to change the DevTools’ context to inspect a specific <iframe> present on the page. This helper has been removed in favor of the iframe context picker, which is much easier to use.

Beginning last year, the internet began playing a bigger role in our lives than ever before. In the US, we went from only three percent of workers to more than forty percent working from home in 2020, all powered by the web. We also relied on it to stay informed, and connect with friends and family when we couldn’t meet in-person.

And despite the many difficulties we all have faced online and offline, we’re proud to keep making Firefox an essential part of what makes the web work.

Today I’m sharing two new features: multiple picture-in-picture (multi-PiP) and our latest privacy protection combo. Multi-PiP allows multiple videos to play at the same time — all the adorable animal videos or March Madness anyone? And our latest privacy protection, the dynamic duo of Total Cookie Protection (technically known as State Partitioning or Dynamic First-Party Isolation) and Supercookie Protections (launched in last month’s release) are here to combat cross-site cookie tracking once and for all.

Today we are pleased to announce Total Cookie Protection, a major privacy advance in Firefox built into ETP Strict Mode. Total Cookie Protection confines cookies to the site where they were created, which prevents tracking companies from using these cookies to track your browsing from site to site.

Cookies, those well-known morsels of data that web browsers store on a website’s behalf, are a useful technology, but also a serious privacy vulnerability. That’s because the prevailing behavior of web browsers allows cookies to be shared between websites, thereby enabling those who would spy on you to “tag” your browser and track you as you browse. This type of cookie-based tracking has long been the most prevalent method for gathering intelligence on users. It’s a key component of the mass commercial tracking that allows advertising companies to quietly build a detailed personal profile of you.

In 2019, Firefox introduced Enhanced Tracking Protection by default, blocking cookies from companies that have been identified as trackers by our partners at Disconnect. But we wanted to take protections to the next level and create even more comprehensive protections against cookie-based tracking to ensure that no cookies can be used to track you from site to site as you browse the web.

With the release of Firefox 86, we are pleased to welcome many new friends of the Fox, developers who’ve contributed their first code changes to Firefox in version 86. 25 were brand new volunteers! Please join us in congratulating, thanking and welcoming all of these diligent and enthusiastic contributors, and take a look at their excellent work...

The Firefox 86.0 release is out. New features this time include picture-in-picture video and "total cookie protection", which appears to be a way to allow third-party cookies while preserving some privacy.

Firefox 86.0 is out today as the latest monthly update to this open-source web browser that continues to work on ramping up its security offerings.

Firefox 86.0 introduces "Total Cookie Protection" in strict mode where every website is then bound to its own "cookie jar" to better prevent sites from tracking users site-to-site. Firefox on Linux and Android also now mitigates against stack clash attacks. DTLS 1.0 support has also been dropped from WebRTC PeerConnections support.

It does feel like the gaps between each new Firefox release gets shorter every month — that, or I’m just getting older!

Anyway, Firefox 86 is the latest stable release. It’s proper released too, not just up on the Firefox FTP. The change-log isn’t nearly as full as the one for last month’s Firefox 85 release but there are a few goodies worth knowing about.

Top of the pile? The ability to watch multiple videos in picture-in-picture mode (PIP) at the same time. Perfect for gawking at the latest escapades of egregiously witty influencers, YouTubers, and TV show binges. Each pip (when focused) also supports keyboard arrow navigation to skip back/forward in 10 second increments.

"Total Cookie Protection" if "Strict Mode" is enabled, AVIF image support, multiple videos in picture-in-picture mode, 12 security fixes and vastly improved WebGL performance on Linux machines with a dedicated GPU are among the highlights in Mozilla Firefox 86.

Firefox as an open-source Chrome alternative is already a quite popular choice among Linux users. With every recent update to Mozilla Firefox, it looks like Firefox is proving to be a compelling choice over Chromium-based browsers overall.

The announcement for Firefox 86.0 is yet something interesting.

With Firefox 86 update, there are two key additions along with some other improvements. Let’s talk about it here.

Mozilla Firefox web browser 86.0 was released with improved pop out video support and latest privacy protection.

In Firefox 86, you can now play multiple videos at the same time in the Picture-in-Picture mode.

The new release also features new privacy protection: Total Cookie Protection. It stops cookies from tracking you around the web by creating a separate cookie jar for every website.

To enable this feature, go to about:preferences#privacy page and set Enhanced Tracking Protection to Strict mode.

Firefox 86 is out, not only with multiple picture-in-picture (now have all the Weird Al videos open simultaneously!) and total cookie protection (not to be confused with other things called TCP) but also some noticeable performance improvements and finally gets rid of Backspace backing you up, a key I have never pressed to go back a page. Or, maybe those performance improvements are due to further improvements to our LTO-PGO recipe, which uses Fedora's work to get rid of the sidecar shell script. Now with this single patch, plus their change to nsTerminator.cpp to allow optimization to be unbounded by time, you can build a fully link- and profile-guided optimized version for OpenPOWER and gcc with much less work. Firefox 86 also incorporates our low-level Power-specific fix to xpconnect.