X11 Guide

This is a stub for now and should give an overview.

Why should I use this?
On normal usage of firejail netstat a | grep X11 shows abstract sockets @/tmp/.X11-unix/X0 that hackers can use to attach keylogger and screenshot programs to.
Using a firejailed x11 server or Wayland prevents this.
Limitations
general:
xephyr: Applications inside the firejailed x11-server are unresizeable and have smaller size than the configurable x11 window.
xpra: dependencies?
xvfb: legacy?

Usage firejail --x11=[xpra|xephyr|xvfb] --net=NETWORKADAPTER PROGRAM

first default is xpra, second xephyr default configuration (in firejail.config)
NETWORKADAPTER finding: ls /sys/class/net

Read the man pages for further configuration.

install?
xpra?
xephyr?
-> resizing goes here
testing?
attaching to existing x11 server

(later in section usage optional clipboard)