1. Third-party cookie blocking by default — 2003 (Safari 1.0); industry first.
2. Intelligent Tracking Prevention (ITP), using on-device machine learning to identify and limit cross-site trackers — 2017; industry first.
3. Storage Access API prompts for embedded third-party content (e.g., social login widgets) — 2018 (ITP 2.0); industry first (co-developed by WebKit, later adopted as a web standard).
4. Full third-party cookie blocking (no exceptions) — 2020 (ITP in Safari 13.1); industry first for a major browser.
Ad/tracking blocking is one of the things that can only be trusted if it's open source, i.e. uBlock Origin.
By the way, does this Adblock Engine actually block trackers? Or it just stops the ads from displaying?