I still need someone to fully explain to me why they want some way to pretend a website is an application.
Especially as, when I tried using PWA (so I could open, for example, Lazada PWA as if it was a specific application instead of just Lazada running in Firefox) the only benefit was that - erm - it worked in it's own profile, without any add-ons from the main browser profile.
For this, I can simply use the WebApp manager https://github.com/linuxmint/webapp-manager - yet I find that right now I only have a single one which is in use (that's the Plex Web interface which I bound to open with a mouse gesture).
Take that away and - well, I just hit menu, type 'ple' and see the Firefox bookmark - Enter to open that.
Hardly really worth the resources and efforts for a tiny minority when a browser is struggling to survive.