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Linux namespaces and seccomp-bpf sandbox
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contrib Various python cleanups -- note is (still) broken Nov 19, 2018
etc-fixes Add alternatives to private-etc for profiles in /etc-fixes Feb 17, 2019
etc pavucontrol does not work with ipc-namespace (#2604) Mar 17, 2019
src minor enhancement: added robustness for setres[gu]id function calls Mar 16, 2019
.travis.yml removed support from travis build Nov 5, 2018
COPYING Baseline firejail 0.9.28 Aug 8, 2015 Retain local apparmor customizations Feb 5, 2019
README merges Mar 7, 2019 Add a profile for pragha Mar 7, 2019
RELNOTES Follow-up on flatpak/snap support (#2601) Mar 16, 2019
configure is out, moving back to 0.9.59 Feb 8, 2019 is out, moving back to 0.9.59 Feb 8, 2019
dummy.c support Spectre mitigation patch for gcc compiler Mar 23, 2018 line counter Jul 27, 2018 strip trailing whitespace May 24, 2017 Fix lintian May 25, 2018 merged building on systems without bash from manevich Feb 14, 2016


Test Status Build Status

Firejail is a SUID sandbox program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces, seccomp-bpf and Linux capabilities. It allows a process and all its descendants to have their own private view of the globally shared kernel resources, such as the network stack, process table, mount table. Firejail can work in a SELinux or AppArmor environment, and it is integrated with Linux Control Groups.

Written in C with virtually no dependencies, the software runs on any Linux computer with a 3.x kernel version or newer. It can sandbox any type of processes: servers, graphical applications, and even user login sessions. The software includes sandbox profiles for a number of more common Linux programs, such as Mozilla Firefox, Chromium, VLC, Transmission etc.

The sandbox is lightweight, the overhead is low. There are no complicated configuration files to edit, no socket connections open, no daemons running in the background. All security features are implemented directly in Linux kernel and available on any Linux computer.

Firejail Firefox Demo

Project webpage:

Download and Installation:




Travis-CI status:

Compile and install

$ git clone
$ cd firejail
$ ./configure && make && sudo make install-strip

On Debian/Ubuntu you will need to install git and a compiler:

$ sudo apt-get install git build-essential

Running the sandbox

To start the sandbox, prefix your command with “firejail”:

$ firejail firefox            # starting Mozilla Firefox
$ firejail transmission-gtk   # starting Transmission BitTorrent
$ firejail vlc                # starting VideoLAN Client
$ sudo firejail /etc/init.d/nginx start

Run "firejail --list" in a terminal to list all active sandboxes. Example:

$ firejail --list
1617:netblue:/usr/bin/firejail /usr/bin/firefox-esr
7719:netblue:/usr/bin/firejail /usr/bin/transmission-qt
7779:netblue:/usr/bin/firejail /usr/bin/galculator
7874:netblue:/usr/bin/firejail /usr/bin/vlc --started-from-file file:///home/netblue/firejail-whitelist.mp4
7916:netblue:firejail --list

Desktop integration

Integrate your sandbox into your desktop by running the following two commands:

$ firecfg --fix-sound
$ sudo firecfg

The first command solves some shared memory/PID namespace bugs in PulseAudio software prior to version 9. The second command integrates Firejail into your desktop. You would need to logout and login back to apply PulseAudio changes.

Start your programs the way you are used to: desktop manager menus, file manager, desktop launchers. The integration applies to any program supported by default by Firejail. There are about 250 default applications in current Firejail version, and the number goes up with every new release. We keep the application list in /usr/lib/firejail/firecfg.config file.

Security profiles

Most Firejail command line options can be passed to the sandbox using profile files. You can find the profiles for all supported applications in /etc/firejail directory.

If you keep additional Firejail security profiles in a public repository, please give us a link:

Use this issue to request new profiles: #1139

We also keep a list of profile fixes for previous released versions in etc-fixes directory .

Current development version: 0.9.59

New profiles:

crow, nyx, klavaro, mypaint, celluoid, nano, transgui, sysprof, simplescreenrecorder, geekbench, xfce4-mixer, pavucontrol, d-feet, seahorse, secret-tool, gnome-keyring, regextester, hardinfo, gnome-system-log, gnome-nettool, netactview, redshift, devhelp, assogiate, subdownloader, font-manager, exfalso, gconf-editor, dconf-editor, mpdris2, sysprof-cli, seahorse-tool, secret-tool, dconf, gsettings, code-oss, pragha

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