It works for the Discord mobile website turning the Discord mobile website into a PWA when added to the home screen, but most mobile website with no default PWA manifest support do not turn into PWAs with this add-on. Hopefully the dev continues to improve this add-on because this add-on has potential to be great.

This fixes saving certain pages as shortcuts you can pin to the start or taskbar not working properly on windows.

Used this with Firefox for Android, with Discord to get a PWA version, instead of just opening in the browser.

Only issue was a slightly squished looking app icon, works perfectly.

Probably will try with some other sites soon