One can get the same effect (full-screen emacs, no window decorations, Lisp) with stumpwm, a window manager written in Common Lisp. It's under active development, but it has not so far succumbed to creeping featuritis. And one can then run Firefox instead of Chrome…
I thought stumpwm was dead until just now! Thanks for that. Did they ever fix the system tray situation? When I last used it (several years ago) there was refusal by the devs to implement any sort of systray support and the third-party tools did not fill the gap, so I switched to i3.
Unfortunately, it's getting harder and harder to use GNOME with anything other than the GNOME WM.
I really should post my pure-stumpwm config on GitHub one of these days. It really is a nice desktop-environment replacement.