firejail is a SUID sandbox software that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces, seccomp-bpf and Linux capabilities.
License: Open Source
Shadow Defender is primarily focused on providing system protection for Windows, allowing users to easily revert changes and protect against malware, while Firejail offers a lightweight solution for isolating applications on Linux systems, emphasizing efficiency and flexibility.