File:Firejailed firefox two windows.png

Summary
Screenshot showing Firefox 52.4.0 (with two windows open) running inside an X11 sandbox (Xephyr + firejail, with Openbox window manager). The second Firefox window has two tabs. 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).