@sarreq Thanks!
Example: the attached mage shows the proxy settings of Firefox related to a locally running docker container divax/i2p:current-i2p-tor. Works AFAIK in all environments.
I do not understand: what do you mean with "server address"? The divax docker container is designed to run on the same system (aka "host") on which you want to use the proxy services for i2p and tor.
Please also check the state of your locally running divax docker container (command line: "docker ps -a").