To be clear, ATT is the system Apple put in place for native apps that is enforced by the App Store review process. When it comes to the browser, I think you’re

To be clear, ATT is the system Apple put in place for native apps that is enforced by the App Store review process. When it comes to the browser, I think you’re more interested in Intelligent Tracking Prevention (ITP). You should check out WebKit‘s tracking prevention policy: https://webkit.org/tracking-prevention-policy/ https://webkit.org/tracking-prevention-policy/ Also the Privacy category on the WebKit blog: https://webkit.org/blog/category/privacy/ https://webkit.org/blog/category/privacy/ Specific blog posts you might be interested in are: https://webkit.org/blog/7675/intelligent-tracking-prevention/ https://webkit.org/blog/7675/intelligent-tracking-prevention... https://webkit.org/blog/9521/intelligent-tracking-prevention-2-3/ https://webkit.org/blog/9521/intelligent-tracking-prevention... https://webkit.org/blog/10218/full-third-party-cookie-blocking-and-more/ https://webkit.org/blog/10218/full-third-party-cookie-blocki... https://webkit.org/blog/11338/cname-cloaking-and-bounce-tracking-defense/ https://webkit.org/blog/11338/cname-cloaking-and-bounce-trac... https://webkit.org/blog/11545/updates-to-the-storage-access-api/ https://webkit.org/blog/11545/updates-to-the-storage-access-... https://webkit.org/blog/15697/private-browsing-2-0/ https://webkit.org/blog/15697/private-browsing-2-0/