Full third-party cookie blocking comes to Safari two years ahead of Chrome

guest · Mar 24, 2020

Full third-party cookie blocking comes to Safari two years ahead of Chrome
March 24, 2020
https://appleinsider.com/articles/2...ing-comes-to-safari-two-years-ahead-of-chrome

Intelligent Tracking Prevention (ITP) was introduced in 2017 and has gained several privacy features since. Initial reactions to the release were varying as publishers worried about how this would affect cross-site tracking and related data sources for ad sales.

ITP blocked cookies before, but left enough information for trackers to begin tracking users based on what was being blocked. With the newest update, even this type of tracking and fingerprinting is blocked. Google Chrome is expected to have full third-party cookie blocking by 2022.

According to the WebKit Blog, Websites have long used login fingerprinting to track users based on login states in websites. Full third-party cookie blocking prevents websites from seeing information about the "global browser state" which allows them to see what websites you were signed into previously.
No telling yet how this will again affect ad firms, as even with its limitations previously, it was reported that hundreds of millions in revenue were being lost as a result of ITP.
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WebKit: Full Third-Party Cookie Blocking and More

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.”
It might seem like a bigger change than it is. But we’ve added so many restrictions to ITP since its initial release in 2017 that we are now at a place where most third-party cookies are already blocked in Safari.
Paves the Way For Other Browsers
Safari continues to pave the way for privacy on the web, this time as the first mainstream browser to fully block third-party cookies by default.
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Full third-party cookie blocking comes to Safari two years ahead of Chrome

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