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LibreWolf is a fork of Firefox which focuses on privacy and security. LibreWolf aims to be a private, secure, and freedom-expanding alternative browser. All telemetry, data collection, and annoyances of Firefox are removed.[1]




LibreWolf is not packaged in the main Gentoo repository, but an official overlay is available.


Using eselect repository, run this command to add the overlay:

root #eselect repository add librewolf git

And then synchronize the repository:

root #emaint -r librewolf sync

Create a new repository file in /etc/portage/repos.conf:

FILE /etc/portage/repos.conf/librewolf.conf
priority = 50
location = /var/db/repos/librewolf
sync-type = git
sync-uri =
auto-sync = Yes

And then synchronize the repository:

root #emaint -r librewolf sync

USE flags

The Gentoo www-client/firefox USE flags are listed below, but still apply to www-client/librewolf:

USE flags for www-client/firefox Firefox Web Browser

X Add support for X11
clang Use Clang compiler instead of GCC
dbus Enable dbus support for anything that needs it (gpsd, gnomemeeting, etc)
debug Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see
eme-free Disable EME (DRM plugin) capability at build time
geckodriver Enable WebDriver support
gmp-autoupdate Allow Gecko Media Plugins (binary blobs) to be automatically downloaded and kept up-to-date in user profiles
hardened Activate default security enhancements for toolchain (gcc, glibc, binutils)
hwaccel Force-enable hardware-accelerated rendering (Mozilla bug 594876)
jack Add support for the JACK Audio Connection Kit
jumbo-build Enable unified build - combines source files to speed up build process, but requires more memory
libproxy Enable libproxy support
lto Enable Link-Time Optimization (LTO) to optimize the build
openh264 Use media-libs/openh264 for H264 support instead of downloading binary blob from Mozilla at runtime
pgo Add support for profile-guided optimization for faster binaries - this option will double the compile time
pulseaudio Add sound server support via media-libs/libpulse (may be PulseAudio or Pipewire, or apulse if installed)
screencast Enable support for remote desktop and screen cast using PipeWire
selinux !!internal use only!! Security Enhanced Linux support, this must be set by the selinux profile or breakage will occur
sndio Enable support for the media-sound/sndio backend
system-av1 Use the system-wide media-libs/dav1d and media-libs/libaom library instead of bundled
system-harfbuzz Use the system-wide media-libs/harfbuzz and media-gfx/graphite2 instead of bundled
system-icu Use the system-wide dev-libs/icu instead of bundled
system-jpeg Use the system-wide media-libs/libjpeg-turbo instead of bundled
system-libevent Use the system-wide dev-libs/libevent instead of bundled
system-libvpx Use the system-wide media-libs/libvpx instead of bundled
system-png Use the system-wide media-libs/libpng instead of bundled (requires APNG patches)
system-python-libs Use system's python site instead of bundled python libraries
system-webp Use the system-wide media-libs/libwebp instead of bundled
telemetry Send anonymized usage information to upstream so they can better understand our users
valgrind Enable annotations for accuracy. May slow down runtime slightly. Safe to use even if not currently using dev-debug/valgrind
wayland Enable dev-libs/wayland backend
wifi Enable necko-wifi for NetworkManager integration, and access point MAC address scanning for better precision with opt-in geolocation services


For localization support, review Localization before emerging. Changing the localization requires a full recompilation of the package, so it's important to get it right the first time.

Assuming the overlay is properly installed, use emerge to install www-client/librewolf:

root #emerge --ask www-client/librewolf


LibreWolf is also available on Flathub. If you prefer to install LibreWolf as a Flatpak, follow the install instructions from the Flatpak wiki article including adding the Flathub repository. Then run this command:

user $flatpak install --user io.gitlab.librewolf-community


Since LibreWolf is based on Firefox, most of the configuration options in Firefox#Configuration apply.


  • $HOME/.librewolf - Main configuration directory.

Running under Wayland

Recent versions of LibreWolf run on Wayland by default if the wayland USE flag is set. To verify this, see the Window Support field under about:support.

In the case that this doesn't work, see Firefox#Running_under_Wayland for forcing Wayland support.


www-client/librewolf respects the L10N variable. See the L10N in the localization guide.


LibreWolf is hardened by default and includes uBlock Origin[2]. See the LibreWolf Documentation for a recommended list of add-ons and which ones to avoid.


See the official LibreWolf FAQ for LibreWolf-specific issues.

The LibreWolf Gentoo overlay is based off of the official Firefox overlay[3], and will inherit any issues that also affect www-firefox. Check out Firefox#Troubleshooting for details.

See also

External resources