Blog post: Firefox 86 Introduces Total Cookie Protection
In hindsight, I should have submitted the article that has the technical details, which is at https://hacks.mozilla.org/2021/02/introducing-state-partitioning/
This feels like a more hands-off and user friendly version of Temporary Containers, which if it works is only a good thing.
I guess the main difference is that nothing gets deleted, so for example google will remember your search history.
I can’t wait to check back in a year to see if postfixing the security domain results in privacy bugs.