WebGPU isn't standardized yet. Hell, most of the features people complain about aren't part of any standard, but for some reason there's this sense that if it's in Chrome, it's standard - as if Google dictates standards.
I’ve been using Firefox since the Quantum version is out. It feels slightly slower to Chrome but it's negligible to me. Otherwise I can't tell a difference (except some heavy web based Office like solutions screaming 'Your browser is not supported!' but actually works fine).
Meanwhile, Apple has historically dictated that Google can't publish Chrome for iOS, only a reskinned Safari. People in glass-walled gardens shouldn't throw stones.
These features work on all the modern desktop browsers and on Android tho!