Core web app compatibility vs … “enhanced” ad blocking. MS teams and some other business tools also don’t support Firefox but work fine in Chrome and Safari.

It is something the Firefox team needs to work on again. I used Firefox from when it was released until Chrome came out and mopped the floor with it. At the time Firefox became the bloated beast and went through a reset.

Unfortunately trying to have a firm stance on not implementing HVEC when they no longer had the largest market share was a bad move and they seem to be slowly back tracking on that.