[vbezhenar]

Installation of web app performed by bookmarking it or by pinning it to home screen. That's performed by explicit user decision and must be honored by browser if it wants to make a distinction between random website and useful website.

[theamk]

Not sure about pinning, but bookmarking should not grant any extra rights. Even the useful websites should not be able to track me forever.

Look, we already have lots of website prompts, like camera and location. The best thing, privacy-wise, would be an explicit prompt: "this website wants to store information, possibly including tracking identifiers, forever. Allow?"