Custom protocol in linux?

Question

I am attempting to port one of my hobby project to linux. Preferrably to Mono since it is written in C#. But I am looking into Python as well.

One of the feature of

Answer 1

The manual way to doing it for firefox:

open firefox
type in about:config to location bar
add new string
name:  network.protocol-handler.app.myapp
value: /path/to/program