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://github.com/CoolerVoid/firefox_tunnel/blob/master/doc/paper/firefox_tunnel_paper.pdf
https://github.com/convisoappsec/firefox_tunnel/blob/master/doc/Beamer_Keynote_looking_style.pdf