# netblue30/firejail

Linux namespaces and seccomp-bpf sandbox

Repository: https://github.com/netblue30/firejail
Canonical: https://ross.abutalabs.com/products/firejail
Homepage: https://firejail.wordpress.com
Language: C
License: GPL-2.0
License Family: copyleft
Last push: 2026-08-22T14:33:26+00:00

## Health v2 (maintenance only)
Score: 82/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 50, longevity 100
- inputs: {"age_days": 4043, "days_push": 11, "days_rel": 172, "gap_med": 126, "n_releases_24m": 4}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7611, forks 671 (observed 2026-08-28T04:10:02.019892+00:00)

## What it is
Firejail is a SUID security sandbox program for Linux that uses kernel namespaces, seccomp-bpf filters, and Linux capabilities to run applications in restricted environments. It ships with security profiles for over 1000 popular desktop applications and requires no daemons or complex configuration.

## Use cases
- sandbox firefox or chromium to protect against browser exploits
- run untrusted applications with restricted filesystem access
- isolate an app's network stack with a private TCP/IP stack
- protect ssh keys and gpg private data from desktop apps
- sandbox servers like nginx with restricted capabilities
- run AppImage packages in a secure sandbox
- set up a hardened Tor browser environment
- integrate automatic sandboxing into the desktop with firecfg

## When to choose
- you want lightweight, low-overhead sandboxing on any Linux 3.x+ kernel
- you need out-of-the-box profiles for common desktop applications
- you prefer no daemons, sockets, or complicated configuration files
- you want to combine sandboxing with SELinux, AppArmor, or X11 isolation

## When to avoid
- you are on a multiuser server where SUID binaries pose a risk
- you need sandboxing for client-server apps like multi-tab terminal emulators
- you require container-grade isolation with full image management
- you are not running Linux

## Facets
- artifact type: cli-tool
- maturity: active
- function: security, privacy, networking, configuration-management
- domain: security, privacy, operating-systems, developer-tools
- platform: cli
- tags: sandbox, seccomp-bpf, linux-namespaces, apparmor, selinux, suid, appimage, security-profiles, desktop-applications, sandboxing, command-line, linux

## Member repositories
- netblue30/firejail (main) score 82

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:02.019892+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:36:50.263842+00:00, confidence not recorded.
  - readme: https://github.com/netblue30/firejail (fetched 2026-08-28T04:10:02.019892+00:00, sha 47bbbd0831ab)
  - homepage: https://firejail.wordpress.com (fetched 2026-08-29T08:32:14.203060+00:00, sha 342d343533ec)
  - site_page: https://firejail.wordpress.com/features-3 (fetched 2026-08-29T08:32:14.206443+00:00, sha 0115b6b18cd8)
  - site_page: https://firejail.wordpress.com/documentation-2 (fetched 2026-08-29T08:32:14.208930+00:00, sha 01a06c36c790)
  - site_page: https://firejail.wordpress.com/documentation-2/basic-usage (fetched 2026-08-29T08:32:14.211284+00:00, sha d1db540c66a4)
  - site_page: https://firejail.wordpress.com/all-about-tor (fetched 2026-08-29T08:32:14.214297+00:00, sha f79ac5cfe893)
  - site_page: https://firejail.wordpress.com/documentation-2/appimage-support (fetched 2026-08-29T08:32:14.216280+00:00, sha 55f61f300443)
  - site_page: https://firejail.wordpress.com/documentation-2/building-custom-profiles (fetched 2026-08-29T08:32:14.218201+00:00, sha 1fa447956206)
  - site_page: https://firejail.wordpress.com/documentation-2/firefox-guide (fetched 2026-08-29T08:32:14.220837+00:00, sha 95e802e8448a)
  - site_page: https://firejail.wordpress.com/documentation-2/linux-capabilities-guide (fetched 2026-08-29T08:32:14.223257+00:00, sha 50bb6e510a15)
- Data as of 2026-08-30T08:39:29.467469+00:00.