I tested without extensions back when I was following the open GH issues, so that wasn't the case then. It could be that MS fixed the issue since, and the conn

I tested without extensions back when I was following the open GH issues, so that wasn't the case then. It could be that MS fixed the issue since, and the connections I see in logs now are from extensions, but I also presume this isn't the case as my firewall rules are IP-based rather than purely app based (since the latter would kill the market browsing functionality).