Goes to show just how broken the web is lately. I quit web dev after 20 years in the industry because it was frustrating me so much. I pretty much exclusively deal with hardware now and love that if I solder everything right, and put everything where it's supposed to, it works, and anything wrong with it is usually my fault or a broken component.

Worked perfectly on Firefox Developer Edition / Windows 10. Was smooth and I didn't notice a single issue, FWIW.