/usr/lib/anon-ws-disable-stacked-tor/systemd-unit-files-generator
From an application using unix domain socket files, it does not define any port numbers, since, well, it is using unix domain socket files. So we have to make it up. For Tor Browser I’ve arbitrarily chosen the port numbers it used to use before Tor Browser was changed to be using unix domain socket files by Tor Project.
A port can be picked as per Stream Isolation. Depending on the application, we might have to add new ports.
Should be good enough for development for for production we might have to use a different port as per above.