Caja sandboxing comes to Linux OS via Crostini containers on ChromeOS. Up your Dev productivity.
YOUTUBE pRlh8LX4kQI Tinkering is encouraged (see end chat)
Chromium and Containers
There was a lot more tinkering on the stage than you’d expect in a live session which is unusual but really cool. The team demonstrated how to call up multiple containers, copy containers and even fire a container inside of another container. To protect your work, Dylan showed off the “Snapshot” feature which is simply an image capture that uses the “lxc snapshot” command. Learn more about lxd, lxc and containers here.
Chromium and containers architecture overview page 
Also, see - Chrome OS - Chrome OS Run Windows Apps