I’m having a problem using widvine for PWAs. I have used the widevine installer and restarted firefox, which is working great without any modification to the user-agent.
I then created a PWA of Spotify and opened that, but Spotify won’t play anything in the PWA (but it does work in firefox directly). I tried adding the user-agent with a general.useragent.override key in the config, which helped get rid of the “Playback of protected content is not enabled.” message, but left a “No supported keysystem was found” error in the console.
I went to the profile folder of my normal Firefox profile, and copied the gpm folder to the PWAs profile, but it’s giving me the “Playback of protected content is not enabled.” error again.
Any advice on how to make widevine work on PWAs?