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Bubblewrap vs Firejail: catalog facts
Bubblewrap	Firejail
Free Free and open source.	Free Free and open source.
Linux, Command line	Linux, Command line
Sandboxes programs without root privileges Proven in production as the basis of Flatpak	Sandboxes existing applications without modifying them Uses kernel namespaces and seccomp-bpf filtering
Linux only Low-level; every sandbox must be configured by hand	Linux only Runs as a SUID program, which some users consider a risk in itself
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.0-or-later	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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