Sorry, wasn't meaning to be argumentative! Was only noting that the push backend can be whatever service the browser chooses, so browser choice allows for different implementations.
Also, you can't have the SW spun up if the page is closed. So Push Notifications do something unique (and better).
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So I understand, a SW can run in the background of an unfocused tab (which can send notifications w user permission) but that is not the same as an installed PWA? Is there any unique characteristic to an installed PWA (permission wise) other than an icon on the dashboard?
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Uh, sort of. SWs can be started without *any* tab open (Push Notifications even work when Chrome is closed on Android). PWA installation is totally separable and doesn't grant the notification permission, tho both require a Service Worker as a background context.
End of conversation
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