Safari joins privacy-focused web browsers like Tor and Brave in blocking third-party cookies by default in a move aimed at being a step forward for web privacy. Google, which announced moving in that direction in May 2019, will not support third-party cookie blocking by default for all Chrome users until 2022. Third-party cookie blocking by default may disable login fingerprinting, and some cross-site request forgery attacks.
Safari recently announced blocking cookies for cross-site resources by default. The move comes after gradually increasing cookie restrictions which started with the introduction of Safari’s Intelligent Tracking Prevention (ITP) in 2017 (now in version 2.3). Safari describes the changes as improving privacy for users:
