File:Firejailed firefox resize xephyr window.png

Summary
Screenshot showing Firefox 52.4.0 running inside an X11 sandbox (Xephyr + firejail, with Openbox window manager). The Xephyr window in the process of being resized larger (by dragging its bottom right handle). 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).