Have firewall settings changed?

[Fastidious]

Firewall settings for network administrators

This is for network administrators. In order for users on your network to use Insync, your firewall rules should connect to the following hosts and ports. Otherwise, users may be blocked or denied access from these services. www.insynchq.com:443/HTTPS r4.insynchq.com:443/HTTPS s.insynchq.com:80/HTTP firebase.insynchq.com:443/HTTPS Google Drive’s hosts and ports.

Based on this post, Insync connects to insynch.com three times, but it now seems to only be connecting once, on 443 (see below). Could you also clarify the use case for firebaseio.com connection? Thanks!