Firejail is a SUID program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces and seccomp-bpf. It allows a process and all its descendants to have their own private view of the globally shared kernel resources, such as the network stack, process table, mount table.

Secure Your Applications with Firejail: A Linux Sandbox Tutoria
https://dev.to/vlythr/secure-your-applications-with-firejail-a-step-by-step-linux-sandbox-tutorial-4f9b

https://linuxconfig.org/protect-your-system-run-your-browser-in-firejail
https://www.makeuseof.com/tag/firejail-simple-way-improve-security-linux/