They don't have to do that. You can have a tiny OS specific program that takes care of the starting part and hide the terminal window and other stuff from the u

They don't have to do that. You can have a tiny OS specific program that takes care of the starting part and hide the terminal window and other stuff from the user and simply open a web page. Or, even a full web browser view embedded inside a custom window. (If users expect a non-browser UI)