Hey there! On Windows I got an error (posting below!), just so you have it.
I also couldn't run it on WebGL (Firefox) either, it hangs when it gets to the end of the Unity logo load - for what it's worth I had this issue on my 2D WebGL build, too. I 'solved' it by switching from brotli compression to gzip in the build settings.
I hope some of this helps, sorry if it doesn't!
