Wow, a bit touchy. I didn’t indicate that your world view was problematic. Just US centric. Was not in any way implying some morals to the debate.
Simply stating facts that not all, arguably not even a majority are IT professionals, except perhaps in the US.
https://en.m.wikipedia.org/wiki/List_of_Linux_adopters
¯\_(ツ)_/¯
Sure can!
If you wish to vet the project https://github.com/filips123/PWAsForFirefox
Or the direct FF extension here https://addons.mozilla.org/en-US/firefox/addon/pwas-for-firefox/