This preference is meant for whitelabel builds that are meant to be
entirely controlled by the server, without user interaction, e.g.
"appliances". Some users have asked for such a thing, so it makes sense to
have it available as an expert preference. In general, we want to ensure
that installs/updates always show a notification so that the user is aware
of what is being installed on their computers. That is the same policy as
other app stores like Google Play, etc.
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