Full Third-Party Cookie Blocking and More | WebKit
webkit.org/blog/10218/full-third-party-cookie-blocking-and-more
What Jamie wrote
I’m very happy to see WebKit (Safari) continuing to push for individuals privacy. Third-Party cookies serve no good purpose other than tracking you around.
Cookies for cross-site resources are now blocked by default across the board. This is a significant improvement for privacy since it removes any sense of exceptions or “a little bit of cross-site tracking is allowed
Google is hoping to add this to Chrome by 2022. Just like Do Not Track, expect them to be the last to protect your privacy.