If you are looking for an easy solution about allow chrome to access the network in your firewall on mac then Use these below steps to enable…
Choose System Preferences from the Apple menu.
Click Security or Security & Privacy.
Click the Firewall tab.
Unlock the pane by clicking the lock in the lower-left corner and enter the administrator username and password.
Click “Turn On Firewall” or “Start” to enable the firewall.
Click Advanced to customize the firewall configuration.
Here if you are other than apple user then there is a different step to allow chrome to access the network. You can learn google chrome antivirus settings here by following our blog in a few simple steps