In the room, under subsection "Web browser" part "Transport-Level Basics" some info has been added:

"Transport-Level Basics

Browsers connect to TCP port 80 by default for plain HTTP, though this is now rare because almost all sites automatically redirect to HTTPS. TCP port 443 is the standard for HTTPS and is used by nearly all websites today.

Many modern sites also support HTTP/3, which uses the QUIC protocol. QUIC is a transport protocol originally developed by Google that combines the functions of TCP and TLS into a single protocol running over UDP port 443. The result is faster and more reliable connections than traditional TCP+TLS. You can identify HTTP/3 traffic in the browser’s Network tab, where the protocol column displays h3.

You can access services on standard ports by specifying them explicitly in the URL. For example, navigating to: https[:]//target[.]com:8443/ or: http[:]//192[.]168[.]1[.]100:8080/ will cause the browser to attempt a connection on that port. If a web server is listening, the page will load."