I tried to add the actual PWA support, and I did get the app to actually install (in chrome, not firefox) and cache the pages. It works offline, but there still are many issues that I don’t know how to fix, for example it reloading (resulting in the audio stopping) when I click a link, which wouldn’t normally happen when online. Also the audio stops playing when the screen turns off in chrome, but it doesn’t in firefox. I can start it again through the media session notification and then it plays.