anchor.diff:  
   # Autorun chrome headless with no GPU
   ENTRYPOINT [ "firefox" ]
  -CMD [ "--start-debugger-server=6000", "-headless" ]
  +CMD [ "--start-debugger-server","--headless"]
  
positive.code: FROM debian:sid
  LABEL name="firefox-headless" \
  			maintainer="Justin Ribeiro <justin@justinribeiro.com>" \
  			version="1.4" \
  			description="Firefox Headless in a container"
  
  # Install deps + add Chrome Stable + purge all the things
  
negative.code: 	apt-transport-https \
  	ca-certificates \
    gnupg \
  	firefox \
  	--no-install-recommends \
  	&& apt-get purge --auto-remove -y curl gnupg \
  	&& rm -rf /var/lib/apt/lists/*
  
  RUN mkdir -p /etc/firefox/
  RUN echo '\
      lockPref("devtools.debugger.force-local", false);\n\
      lockPref("devtools.debugger.remote-enabled", true);\n'\
  		>> /etc/firefox/syspref.js
  
  # Add firefox as a user
  RUN groupadd -r firefox && useradd -r -g firefox -G audio,video firefox \
  