A native app you install on a phone has a strictly limited sandbox and a permission model, and if it can silently read all clipboard without user interaction, that would be a bug that needs fixing.
A native app on Android can install OS hooks for all sorts of things (such as, "you connected to a WIFI network", "you took a photo", etc) and thereby can silently react to events while it is not even running.
This is intended and requires the appropriate permissions to be given. In the same way, I don't see the problem with an extension monitoring the clipboard as long as the user has to give explicit permission for it.
This is intended and requires the appropriate permissions to be given. In the same way, I don't see the problem with an extension monitoring the clipboard as long as the user has to give explicit permission for it.