Nice, does it work on Firefox?

I took great pains to make sure it does. The one thing that Firefox doesn't support is mounting a local drive so you can develop your app, library, or game more quickly, which needs https://developer.mozilla.org/en-US/docs/Web/API/Window/show...

It doesn't on Firefox ESR.

Ahh, figured it out.

Firefox ESR doesn't return an iterator from map.values() with .find() etc on it.

Okay, fixing now.

Fixed!

Odd. Not sure why.

Same for me, it didn't work on firefox so I checked if it was only me. I also have ESR

Downloaded FF ESR just now, working on fixing it.