They've been working on support for a while (years), eg this 2022 commit. https://github.com/WebKit/WebKit/commit/e6717cdeb6a841f4b1f6b9d8d3b0dec947850abe https

They've been working on support for a while (years), eg this 2022 commit. https://github.com/WebKit/WebKit/commit/e6717cdeb6a841f4b1f6b9d8d3b0dec947850abe https://github.com/WebKit/WebKit/commit/e6717cdeb6a841f4b1f6... perhaps don't be hard on them, Chrome released this to stable 2 months ago.