And that prompt isn't native one which won't be solved by what Firefox does 
https://twitter.com/firefox/status/1113211117008969728 …
Replying to @nekrtemplar
Yep...and the only way to really make this work is to add a new state into the set of states that `PermissionStatus.onchange` reflect...and Mozilla hasn't engaged on that (AFIACT). *sigh*
5:38 PM - 2 Apr 2019
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& Web Standards TL; Blink API OWNER
Named PWAs w/
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