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How does HTTPS help circumvent firewalls?

The firewall cannot do deep packet inspection on encrypted connections, since it cannot decrypt the data: https://en.wikipedia.org/wiki/Deep_packet_inspection

A firewall cannot see encrypted layer-7 traffic, true, but you can block sites by IP/hostname. HTTPS does not help you circumvent firewalling.

But AFAIK they can block the whole domain, when you access an https site any proxy or firewall you have can see the domain but nothing more.

For example a firewall would see that you entered Google.com but not what you searched