You think Chrome has ~62% market share because ..Meets has blurred backgrounds ?

If anything, it is impressive how Chrome has managed to be the majority browser, given that by default we get Edge on Windows, Safari on MacOS/iOS and Firefox on Ubuntu.

That's what they are supposed to do. The web standards bodies don't like to consider standardizing new features until there is an implementation in the field so they can see how well it works in practice.

So when one browser maker wants a new feature they make a spec and implement it. If it seems to be useful other browser makers will implement it, maybe with changes they think improve it. Then the standards bodies will look at all those and make a standard.

For that particular feature it was actually first suggested by people from Intel and Apple. Google thinks it is a good idea and is the first to write a spec for it and implement it. It seems highly likely that Mozilla and Apple will follow and it will be standardized.