Launching chrome adds port forwards

I've installed Google Chrome using the google-chrome brew cask, a while ago.

This moing I noticed that I have various ports forwarded on my mack to random places, as show by the lsof command…

$ sudo lsof -i :80
COMMAND    PID   USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
Google    4820 skylab  109u  IPv4 0x4409242e9a43494f      0t0  TCP 192.168.20.157:52376->104.16.33.193:http (ESTABLISHED)
Google    4820 skylab  172u  IPv4 0x4409242e9a5ac55f      0t0  TCP 192.168.20.157:52308->104.16.33.193:http (ESTABLISHED)
Google    4820 skylab  173u  IPv4 0x4409242e9a931edf      0t0  TCP 192.168.20.157:52182->a23-63-99-40.deploy.static.akamaitechnologies.com:http (ESTABLISHED)
Google    4820 skylab  200u  IPv4 0x4409242e9a39fc8f      0t0  TCP 192.168.20.157:52226->lhr25s02-in-f98.1e100.net:http (ESTABLISHED)

I've tried disabling all my extensions & also deleted all the Chrome Apps from the only user I am currently logged in as, but the port forwards are still appearing. I've also removed & re-installed the Chrome cask.

Can anyone advice why theses are here (if legitimate), or how to remove them (if not)?