Do I need to ask for an add on to use a second port?

Hi,

How similar are add on to docker images? I want to install an debugger node in the Node Red add on but it says to open a second port for dockers and there are a few extra flags but do I need to do this with an add on too?
It all seems to depend on how add ons are made in HA and how the HA Firewall works.