I originally saw it here on HN and have been hooked ever since.
[1] Screenshot: https://camo.githubusercontent.com/99b9e199ffb820c27c4e977f2...
[2] https://github.com/strongdm/leash
Fun fact: Do you know what container / sandboxing system is in most widespread use? Not docker containers, certainly not bubblewrap, and not even full VMs or firecracker. It's Chrome tabs.