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SELinux vs Firejail: catalog facts
SELinux	Firejail
Free Free and open source.	Free Free and open source.
Linux, Command line	Linux, Command line
Mandatory access control enforced by the kernel Complete set of policy compilers and management tools	Sandboxes existing applications without modifying them Uses kernel namespaces and seccomp-bpf filtering
Linux only Writing and debugging policy has a steep learning curve	Linux only Runs as a SUID program, which some users consider a risk in itself
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.