File:Firejailed firefox xeyes.png

Summary
Screenshot showing Firefox 52.4.0 (with two windows open) running inside an X11 sandbox (Xephyr + firejail, with Openbox window manager). An Xterm and xeyes are also open in the sandbox. The cursor is shown in two locations, moving from inside to outside the Xephyr window, but the 'eyes' do not move to track it once outside (indicating the X11 isolation). The main ("parent") desktop is running GNOME 3.22.2. Uploaded for use in a forthcoming mini-guide on X11 sandboxing (an addendum to Sakaki's EFI Install Guide).