FYI, there is some crates implementing AppContainer: [appjaillauncher-rs](https://github.com/trailofbits/appjaillauncher-rs) and [flying-sandbox-monster](https://github.com/trailofbits/flying-sandbox-monster) cc @yying
FYI, there is some crates implementing AppContainer: appjaillauncher-rs and flying-sandbox-monster
cc @yying