The way to use firefox to make a tunnel to remote communication. For I/O of payloads uses cookie.sqlite and html with javascript to auto submit, the browser runs in hidden mode.
https://medium.com/code-fighters/firefox-tunnel-to-bypass-any-firewall-bc6f8b432980
https://github.com/convisoappsec/firefox_tunnel/blob/master/doc/Beamer_Keynote_looking_style.pdf