FF does pretty much the same thing.

With phone apps I sort of get it: you are already installing something and clearly have a long-term relationship with the provider of such an app and the app likely has functionality that you need badly enough that having the app alert you makes sense.

But for me the web is 'transient', even as the maker of a SPA I wouldn't dream of bugging my users outside of their own decision to come back to the site. All this needy software is - to me - just a source of irritation.