Write an app to display the (URL) argument passed and require the user to confirm or reject before running the browser using any of one or more default and configurable command line templates.
Add a "Install as default http, https, file:// uri handler" button in the settings gui. Prompt the user to install the app as default handler on first run.
Add opt-in optional debug logging of at least: {source_app_path:, url:, date_opened: } to a JSON lines log file