Love it! I can get rid of Chromium now. It works, and gives back a much needed function.

FInally, pwa for firefox

Worked fine for me

Excellent extension that adds back functionality that got cut off many years ago (RIP Firefox Prism :( )
Really can't live without this now, I was sick of having to use Nativefier for this kinda thing.
Works perfectly in Arch Linux!