Firefox

Like i said earliier, im a web dev, and that's a list of web standards, and a comparison which browser has implemented which spec.

You literally said you don't understand them, so maybe brush up on the subject you are discussing instead of telling others how things are?

I'm not defending anything, just providing info and saying why I use what I use.

If a browser is missing official standards features, then the browser is objectively lagging behind. Yes, the web devs are at fault for using things that lack wider support, but that comes down to many factors such as having the time and money to implement things in a more complex manner to support more browsers. That's not always feasible or possible if a certain core feature lets us save hours or days.