Quick PSA : yes, #Mozilla has been disappointing, but so far, they’re the only organization preventing Google to have a full control over web standards. Blink/WebKit-based browsers (Chromium, Vivaldi…) do NOT help at all in that regard.

So please use #Firefox or a #Gecko-based alternative (#ZenBrowser, #LibreWolf…). Ride the nightly release train and report bugs if you can. #Servo is getting ready, but for the next ~5 years, Gecko is our only suitable option.

I'm using #zenbrowser as a casual replacement to Firefox atm. The native customization options are a big feature plus for me.
#arkenfox user.js can be applied to any #firefox fork.

In the future #ladybird could be a good option, lets see...