My advice to anyone using pgadmin4 is to try running it in Docker.
I replied privately to George with more details. I can forward all that here if people want.
You might end up using Docker only for pgadmin4 but once you get used to using it I think it will be a valuable tool for you. The longer I use it the more places it fits in.
Docker is certainly a fine way to do this, however I do also see value in a "Don't automatically launch a browser at startup" option in the runtime.