[esbranson]

I am immensely impressed that the developers here are using widely-supported but technically-experimental interfaces and methods. Without IE-like polyfill bloat.

One of my recent favorite experimental features is TLS Encrypted Client Hello, which protects against one of the last MitM attacks used by authoritarian governments to filter the Web. I note that while ECH is experimental, it is also widely supported, including by Firefox. Firefox needs to pick up the pace with implementing the CSS Typed Object Model API, which they thoroughly document on MDN. Bravo to the Ministry of Digital Transformation. And for those users who want better Web API support with good privacy protections, there is Brave (I only switched away from Firefox back in the day because Chromium had better experimental Wayland support, and better memory management on my dinosaur).

[worksonmine]

Brave, the chromium fork that hijacks affiliate links? GTFO.

And you know, they could still use this feature on chromium browsers, just feature test it before breaking it on Firefox. Or use any of the many ways to achieve the same result, classList.includes is one. It's webdev 101, don't be impressed by their lazyness.

And an aside, MDN is maintained by users like Wikipedia, not by Mozilla. If you're missing something there you can just add it, even if Firefox will never support it.