Firejail is a SUID application designed to enhance security by isolating untrusted programs through the use of Linux namespaces and seccomp-bpf. This tool enables a process and its child processes to maintain a distinct view of shared kernel resources, including the network stack, process table, and mount table. Developed in C with minimal dependencies, Firejail is compatible with any Linux system that operates on version 3.x of the kernel or later. Its sandboxing solution is efficient, resulting in minimal overhead. Users benefit from its simplicity, as there are no intricate configuration files to manage, no open socket connections, and no background daemons to contend with. All security mechanisms are built directly into the Linux kernel, making them accessible on any Linux machine. This combination of features makes Firejail an appealing choice for those looking to bolster their system's defenses against potential threats.