What's the issue with Edge? https://caniuse.com/#feat=wasm shows Edge has support. Seems like Chrome does on Android as well.

> The time needed to figure out integration between JavaScript and Rust is too long.

Yup! This is currently a very low-level target; we're actively working on stuff here. It'll get nicer over time!

This is choice between "No Edge support" vs "No game in browser at all".

Why does Edge adoption matter? The highest browser usage share I could find for Edge was 4.21%

4% is still a decent portion of the market, and likely contains a more desirable market demographic than those that are on IE (depending on your product, obviously). I'm not saying it's really important, but any potential users gained is a good thing, right?

I don't understand how it's a problem. Just show a message "Your browser is not supported. Please use one of the following browsers." To play games on Windows people install MANY proprietary launchers(From Blizzard, EA, UBI, etc. Steam is a glorified launcher also), I don't see how installing Chrome just to play a game is more difficult.

I'm with you on that, and it's the reason at my job we aren't bending over backwards for compatibility. We don't support IE. It's not _really_ a problem, but it could lose you users. How many, I don't know. Whether that's a problem or not is up to you.

Turn the question around: can we do something else with those resources to get 4% more users and an increase in goodwill?

Indeed. Edge is the only browser that has WebVR support for the Windows MR virtual reality headsets. Getting support into Primrose for Edge has been... more than I can manage at the current time.