Why is avacaine.githhub.io special? For those who cannot enable JSPI (especially for people who may not have a ton of money, and cant afford a computer other than a free chromebook from a school)
You may want to play minecraft with optmial Java performance. HOWEVER, many districts block chrome://flags
This developer JSPI launch from chrome dev - devloper.google.com has a JSPI origin request, automatically setting your browser to JSPI on that page.