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<languages/>
{{infobox application
  |name=Mozilla Firefox
  |image=Firefox logo, 2019.svg
  |type=Web Browser
  |developer=Mozilla Foundation & Community
  |firstRelease=November 9, 2004
  |latestRelease=Firefox 140.0 (June 24, 2025)
  |status=Active
  |license=[https://www.mozilla.org/MPL/2.0/ Mozilla Public License 2.0]
  |os=Cross-platform (Linux, macOS, Windows, *BSD)
  |website=[https://www.mozilla.org/firefox mozilla.org/firefox]
  |github=mozilla/firefox
  |bugTracker=[https://bugzilla.mozilla.org/ Bugzilla]
  |documentation=[https://support.mozilla.org/ Official Support]
}}
<translate>
<translate>
<!--T:1-->
<!--T:1-->
[https://www.mozilla.org/firefox Firefox] is a graphical web browser developed by Mozilla.
<strong>Firefox</strong><ref>Mozilla Foundation, "Firefox", Official Website, Accessed June 2025. https://www.mozilla.org/firefox</ref> is a free and open-source web browser developed by the Mozilla Foundation. It is known for its focus on privacy, security, and user freedom, offering a customizable experience through a rich ecosystem of add-ons and themes.
 
== Installation == <!--T:2-->
 
==== Shell ==== <!--T:56-->
</translate>
 
{{code|lang=bash|line=no|1=$ nix-shell -p firefox}}
 
<translate>
<!--T:57-->
The command above makes <code>firefox</code> available in your current shell without modifying any configuration files.
 
==== System setup ==== <!--T:58-->
</translate>
</translate>
{{code|lang=nix|line=no|1=# Example for /etc/nixos/configuration.nix
environment.systemPackages = [
  pkgs.firefox
];
# User-specific installation (in ~/.config/nixpkgs/home.nix)
home.packages = [
  pkgs.firefox
];}}
<translate>
<translate>
== Installation == <!--T:2-->
<!--T:59-->
After rebuilding with <code>nixos-rebuild switch</code>, Firefox will be installed system-wide.
 
== Configuration == <!--T:60-->
 
==== Basic ==== <!--T:61-->
</translate>
</translate>
{{code|lang=nix|line=no|1=
programs.firefox = {
  enable = true;
  languagePacks = [ "en-US" "de" "fr" ];
  preferences = {
    "browser.startup.homepage"      = "https://example.com";
    "privacy.resistFingerprinting"  = true;
  };
  policies = {
    DisableTelemetry = true;
  };
};
}}
<translate>
<translate>
<!--T:3-->
<!--T:3-->
Set <code>programs.firefox.enable</code> to true in your system or [[Home Manager]] configuration.
The snippet above enables Firefox for all users (or the current Home Manager profile, if placed in <code>home.nix</code>).
Keep in mind that the NixOS and Home Manager modules have different options, so choose accordingly.
 
==== Advanced ==== <!--T:23-->
 
<!--T:24-->
Home Manager allows for deep customization of Firefox, including extensions, search engines, bookmarks, and themes. The example below shows a configuration for adding custom search engines with aliases.
</translate>
</translate>
{{code|lang=nix|line=no|1=
programs.firefox = {
  enable = true;
  languagePacks = [ "en-US" ];
  policies = {
    # Updates & Background Services
    AppAutoUpdate                = false;
    BackgroundAppUpdate          = false;
    # Feature Disabling
    DisableBuiltinPDFViewer      = true;
    DisableFirefoxStudies        = true;
    DisableFirefoxAccounts        = true;
    DisableFirefoxScreenshots    = true;
    DisableForgetButton          = true;
    DisableMasterPasswordCreation = true;
    DisableProfileImport          = true;
    DisableProfileRefresh        = true;
    DisableSetDesktopBackground  = true;
    DisablePocket                = true;
    DisableTelemetry              = true;
    DisableFormHistory            = true;
    DisablePasswordReveal        = true;
    # Access Restrictions
    BlockAboutConfig              = false;
    BlockAboutProfiles            = true;
    BlockAboutSupport            = true;
    # UI and Behavior
    DisplayMenuBar                = "never";
    DontCheckDefaultBrowser      = true;
    HardwareAcceleration          = false;
    OfferToSaveLogins            = false;
    DefaultDownloadDirectory      = "${home}/Downloads";
    # Extensions
    ExtensionSettings = let
      moz = short: "https://addons.mozilla.org/firefox/downloads/latest/${short}/latest.xpi";
    in {
      "*".installation_mode = "blocked";
      "uBlock0@raymondhill.net" = {
        install_url      = moz "ublock-origin";
        installation_mode = "force_installed";
        updates_disabled  = true;
      };
      "{f3b4b962-34b4-4935-9eee-45b0bce58279}" = {
        install_url      = moz "animated-purple-moon-lake";
        installation_mode = "force_installed";
        updates_disabled  = true;
      };
      "{73a6fe31-595d-460b-a920-fcc0f8843232}" = {
        install_url      = moz "noscript";
        installation_mode = "force_installed";
        updates_disabled  = true;
      };
    };
    # Extension configuration
    "3rdparty".Extensions = {
      "uBlock0@raymondhill.net".adminSettings = {
        userSettings = rec {
          uiTheme            = "dark";
          uiAccentCustom    = true;
          uiAccentCustom0    = "#8300ff";
          cloudStorageEnabled = mkForce false;
          importedLists = [
            "https:#filters.adtidy.org/extension/ublock/filters/3.txt"
            "https:#github.com/DandelionSprout/adfilt/raw/master/LegitimateURLShortener.txt"
          ];
          externalLists = lib.concatStringsSep "\n" importedLists;
        };
        selectedFilterLists = [
          "CZE-0"
          "adguard-generic"
          "adguard-annoyance"
          "adguard-social"
          "adguard-spyware-url"
          "easylist"
          "easyprivacy"
          "https:#github.com/DandelionSprout/adfilt/raw/master/LegitimateURLShortener.txt"
          "plowe-0"
          "ublock-abuse"
          "ublock-badware"
          "ublock-filters"
          "ublock-privacy"
          "ublock-quick-fixes"
          "ublock-unbreak"
          "urlhaus-1"
        ];
      };
    };
  };
  profiles.default.search = {
    force          = true;
    default        = "DuckDuckGo";
    privateDefault  = "DuckDuckGo";
    engines = {
      "Nix Packages" = {
        urls = [
          {
            template = "https://search.nixos.org/packages";
            params = [
              { name = "channel"; value = "unstable"; }
              { name = "query";  value = "{searchTerms}"; }
            ];
          }
        ];
        icon          = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
        definedAliases = [ "@np" ];
      };
      "Nix Options" = {
        urls = [
          {
            template = "https://search.nixos.org/options";
            params = [
              { name = "channel"; value = "unstable"; }
              { name = "query";  value = "{searchTerms}"; }
            ];
          }
        ];
        icon          = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
        definedAliases = [ "@no" ];
      };
      "NixOS Wiki" = {
        urls = [
          {
            template = "https://wiki.nixos.org/w/index.php";
            params = [
              { name = "search"; value = "{searchTerms}"; }
            ];
          }
        ];
        icon          = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
        definedAliases = [ "@nw" ];
      };
    };
  };
};
}}
<translate>
<translate>
<!--T:25-->
[https://nix-community.github.io/home-manager/options.xhtml#opt-programs.firefox.enable More options are available on Home Manager's site.]
== Firefox Variants == <!--T:4-->
== Firefox Variants == <!--T:4-->
</translate>
 
<translate>
<!--T:5-->
<!--T:5-->
There are several Firefox variants that you can choose to install. To choose a variant, set <code>programs.firefox.package</code> accordingly.
There are several Firefox variants available. To choose one, set the <code>programs.firefox.package</code> option accordingly.
</translate>
<translate>
<!--T:6-->
'''Note:''' The packages for the variants listed below are installed ''instead'' of the normal <code>firefox</code> package. Thus, you'll have to choose one among these options.
</translate>
</translate>
{{Note|<translate><!--T:6--> The packages for the variants listed below are installed ''instead'' of the normal <code>firefox</code> package.</translate>}}
<translate>
<translate>
=== Variant: Official Binaries === <!--T:7-->
=== Variant: Official Binaries === <!--T:7-->
</translate>
 
<translate>
<!--T:8-->
<!--T:8-->
Mozilla provides official pre-built Firefox binaries. This is the <code>firefox-bin</code> package and will be downloaded directly from the Mozilla servers.
Mozilla provides official pre-built Firefox binaries via the <code>firefox-bin</code> package, which are downloaded directly from Mozilla's servers.
</translate>
 
<translate>
=== Variant: Extended Support Release (ESR) === <!--T:9-->
=== Variant: Extended Support Release (ESR) === <!--T:9-->
</translate>
 
<translate>
<!--T:10-->
<!--T:10-->
<code>firefox-esr</code> is a variant of Firefox provided by Mozilla, which receives security updates for a longer period of time and a more relaxed cadence of feature implementation. It also allows users to change otherwise untouchable behavior with Firefox using policies.
<code>firefox-esr</code> is a variant that receives security updates for a longer period with a slower feature implementation cadence. It also allows for more extensive policy-based configuration.
</translate>
 
<translate>
=== Variant: Nightly === <!--T:11-->
=== Variant: Nightly === <!--T:11-->
</translate>
 
<translate>
<!--T:12-->
<!--T:12-->
Nightly builds are daily builds of Firefox from the central Mozilla repository.
Nightly builds are daily builds from the central Mozilla repository.
 
==== Method 1: Using nix-community/flake-firefox-nightly ==== <!--T:13-->
 
<!--T:14-->
This method is reproducible but may lag behind the upstream version. First, add the input to your flake:
</translate>
</translate>
<translate>
==== Method #1: Using nix-community/flake-firefox-nightly ==== <!--T:13-->
</translate>
<translate>
<!--T:14-->
This method is reproducible but may lag behind the upstream version of Firefox Nightly. It uses flakes.


<!--T:15-->
{{code|lang=nix|line=no|1=
First, add the following inputs to your flake:
</translate>
<syntaxhighlight lang="nix">
inputs = {
inputs = {
   firefox.url = "github:nix-community/flake-firefox-nightly";
   firefox.url = "github:nix-community/flake-firefox-nightly";
   firefox.inputs.nixpkgs.follows = "nixpkgs";
   firefox.inputs.nixpkgs.follows = "nixpkgs";
};
};
</syntaxhighlight>
}}
 
<translate>
<translate>
<!--T:16-->
<!--T:16-->
Then, using the [[Flakes#Using_nix_flakes_with_NixOS|specialArgs]] attribute to pass flake inputs to external configuration files, add the nightly package to your system:
Then, add the package to your system:
</translate>
</translate>
<syntaxhighlight lang="nix">
 
{ pkgs, inputs, config, ... }:
{{code|lang=nix|line=no|1=
{
# In configuration.nix, assuming use of specialArgs
  environment.systemPackages = [
environment.systemPackages = [
    inputs.firefox.packages.${pkgs.system}.firefox-nightly-bin
  inputs.firefox.packages.${pkgs.stdenv.hostPlatform.system}.firefox-nightly-bin
  ];
];
}
}}
</syntaxhighlight>
 
==== Method #2: Using mozilla/nixpkgs-mozilla ==== <!--T:18-->
<nowiki></translate></nowiki>
<translate>
<translate>
==== Method 2: Using mozilla/nixpkgs-mozilla ==== <!--T:18-->
<!--T:19-->
<!--T:19-->
This method is not necessarily reproducible without a [[Flake]]-like system because it fetches resources from non-pinned URLs, but it will always be the latest Nightly  version.
This method is not necessarily reproducible without a flake-like system but will always be the latest version.
<syntaxhighlight lang="nix">
</translate>
nixpkgs.overlays =
 
   let
{{code|lang=nix|line=no|1=
    # Change this to a rev sha to pin
nixpkgs.overlays = [
    moz-rev = "master";
   (import (builtins.fetchTarball "https://github.com/mozilla/nixpkgs-mozilla/archive/master.tar.gz"))
    moz-url = builtins.fetchTarball { url = "https://github.com/mozilla/nixpkgs-mozilla/archive/${moz-rev}.tar.gz";};
];
    nightlyOverlay = (import "${moz-url}/firefox-overlay.nix");
  in [
    nightlyOverlay
  ];
programs.firefox.package = pkgs.latest.firefox-nightly-bin;
programs.firefox.package = pkgs.latest.firefox-nightly-bin;
</syntaxhighlight>
}}
</translate>
 
<translate>
<translate>
<!--T:22-->
<!--T:22-->
It is also needed to pass the <code>--impure</code> option to nix commands. For example,
Using this method requires the <code>--impure</code> flag for Nix commands, for example:
</translate>
</translate>
<syntaxHighlight lang="console">
 
$ nixos-rebuild switch --impure
{{code|lang=bash|line=no|1=$ nixos-rebuild switch --impure}}
</syntaxHighlight>
 
<translate>
<translate>
== Customizing with [[Home Manager]] == <!--T:23-->
== Tips and Tricks == <!--T:28-->
 
==== Force XWayland (X11) instead of Wayland ==== <!--T:62-->
 
<!--T:63-->
Firefox defaults to native Wayland when running under a Wayland compositor. To force it to use XWayland (X11) instead:
</translate>
</translate>
{{code|lang=nix|line=no|1=environment.sessionVariables.MOZ_ENABLE_WAYLAND = "0";}}
<translate>
<translate>
<!--T:24-->
<!--T:30a-->
Home manager allows more customization for firefox. Such as  extensions, search engines, bookmarks, [https://www.userchrome.org/ userChrome] and [https://kb.mozillazine.org/User.js_file user.js]. The example below shows a basic config defining Nix packages & options as a search engine.
This is useful when troubleshooting Wayland-specific issues or when certain features work better under X11.
 
==== Touchpad Gestures and Smooth Scrolling ==== <!--T:34-->
 
<!--T:35-->
Enable <code>xinput2</code> to improve touchscreen support and enable additional touchpad gestures and smooth scrolling.
</translate>
</translate>
<translate>
<!--T:25-->
[https://nix-community.github.io/home-manager/options.xhtml#opt-programs.firefox.enable More options are available on Home Manager's site]
</translate>
<syntaxhighlight lang="nix">
home-manager.users.username = {
  programs.firefox = {
    enable = true;
    profiles = {
      "user" = {
        id = 0;
        isDefault = true;


        search.engines = {
{{code|lang=nix|line=no|1=
          "Nix Packages" = {
environment.sessionVariables.MOZ_USE_XINPUT2 = "1";
            urls = [{
}}
              template = "https://search.nixos.org/packages";
 
              params = [
                { name = "query"; value = "{searchTerms}"; }
              ];
            }];
            icon = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
            definedAliases = [ "@np" ];
          };
          "Nix Options" = {
            definedAliases = [ "@no" ];
            urls = [{
              template = "https://search.nixos.org/options";
              params = [
                { name = "query"; value = "{searchTerms}"; }
              ];
            }];
          };
        };
      };
    };
  };
</syntaxhighlight>
<translate>
<translate>
==== KDE Plasma Integration ==== <!--T:29-->


== FAQ == <!--T:26-->
</translate>
<translate>
=== How do I use ALSA with Firefox instead of PulseAudio? === <!--T:27-->
</translate>
<syntaxhighlight lang="nix">
programs.firefox.package = (pkgs.wrapFirefox.override { libpulseaudio = pkgs.libpressureaudio; }) pkgs.firefox-unwrapped { };
</syntaxhighlight>
<translate>
== Tips == <!--T:28-->
</translate>
<translate>
<!--T:29-->
=== Enabling
[https://community.kde.org/Plasma/Browser_Integration#How_to_install Plasma Browser Integration] ===
</translate>
<translate>
<!--T:30-->
<!--T:30-->
1. Add the following line to your <code>configuration.nix</code> (note that [[KDE#Installation|enabling Plasma]] automatically does this):
1. Add the native messaging host package to your configuration:
</translate>
</translate>


<syntaxhighlight lang="nix">
{{code|lang=nix|line=no|1=programs.firefox.nativeMessagingHosts.packages = [ pkgs.kdePackages.plasma-browser-integration ];}}
programs.firefox.nativeMessagingHosts.packages = [ pkgs.plasma5Packages.plasma-browser-integration ];
 
</syntaxhighlight>
<translate>
<translate>
<!--T:31-->
<!--T:31-->
2. Install [https://addons.mozilla.org/en-US/firefox/addon/plasma-integration/ KDE's Firefox extension].
2. Install the corresponding [https://addons.mozilla.org/en-US/firefox/addon/plasma-integration/ browser add-on].
</translate>
 
<translate>
==== Use KDE file picker ==== <!--T:32-->
=== Use KDE file picker === <!--T:32-->
 
</translate>
<translate>
<!--T:33-->
<!--T:33-->
You must instruct Firefox to use the file picker offered by the XDG Desktop Portal framework. This setting can be found in Firefox's ''about:config'' as ''widget.use-xdg-desktop-portal.file-picker''. The value 1 means "always". To set it using NixOS, add to '<code>configuration.nix'</code>
To use the KDE file picker instead of the GTK one, set the following preference:
</translate>
</translate>
<syntaxhighlight lang="nix">
 
  # Make Firefox use the KDE file picker.
{{code|lang=nix|line=no|1=
  # Preferences source: https://wiki.archlinux.org/title/firefox#KDE_integration
programs.firefox.preferences = {
  programs.firefox = {
  "widget.use-xdg-desktop-portal.file-picker" = 1;
    enable = true;
    preferences = {
      "widget.use-xdg-desktop-portal.file-picker" = 1;
    };
  };
</syntaxhighlight>
<translate>
=== Use xinput2 === <!--T:34-->
</translate>
<translate>
<!--T:35-->
You can make Firefox use xinput2 by setting the <code>MOZ_USE_XINPUT2</code> environment variable. This improves touchscreen support and enables additional touchpad gestures. It also enables smooth scrolling as opposed to the stepped scrolling that Firefox has by default. To do this, put the following in your config:
</translate>
<syntaxhighlight lang="nix">
environment.sessionVariables = {
  MOZ_USE_XINPUT2 = "1";
};
};
</syntaxhighlight>
}}
 
<translate>
<translate>
== Troubleshooting==
== Troubleshooting == <!--T:36-->
=== <code>nativeMessagingHosts</code> doesn't work === <!--T:40-->
 
==== Native Messaging Hosts Fail to Load ==== <!--T:40-->
 
<!--T:42-->
Native messaging hosts (used for extensions like Plasma Integration) do not work with the <code>-bin</code> variants of Firefox or with Firefox installed imperatively via <code>nix-env</code>. You must use a variant built from source via your NixOS or Home Manager configuration.
 
==== ALSA audio instead of PulseAudio ==== <!--T:27-->
 
<!--T:64-->
To force Firefox to use ALSA, you can override it with a wrapper:
</translate>
</translate>
{{code|lang=nix|line=no|1=programs.firefox.package = pkgs.wrapFirefox pkgs.firefox-unwrapped { libpulseaudio = pkgs.libalsa; };}}
<translate>
<translate>
<!--T:41-->
==== Screen Sharing under Wayland ==== <!--T:43-->
These options, for example  <code>enablePlasmaBrowserIntegration</code>,  or<code>enableGnomeExtensions</code>,  do not work with the <code>bin</code> variants of the Firefox packages or with Firefox installed via<code>nix-env</code>.
</translate>
<hr />


<translate>
=== Screen Sharing under Wayland === <!--T:43-->
</translate>
<translate>
<!--T:44-->
<!--T:44-->
When using Firefox with Wayland, screen sharing options might be limited and require additional configuration (exact capabilities vary with different compositors).
Screen sharing on Wayland requires enabling PipeWire and the appropriate XDG Desktop Portals.
</translate>
<translate>
<!--T:47-->
* Enable [https://pipewire.org/ PipeWire]
</translate>
</translate>


<syntaxhighlight lang="nix">
{{code|lang=nix|line=no|1=
services.pipewire.enable = true;
services.pipewire.enable = true;
</syntaxhighlight>
xdg.portal = {
  enable = true;
  # Add the portal for your compositor, e.g.:
  extraPortals = with pkgs; [
    xdg-desktop-portal-wlr # For Sway/wlroots
    # xdg-desktop-portal-gtk # For GNOME
    # xdg-desktop-portal-kde # For KDE
  ];
};
}}


<translate>
<translate>
<!--T:45-->
== See also == <!--T:65-->
* Add PipeWire support to Firefox:
 
</translate>
<!--T:66-->
<translate>
* [[Home Manager]] – Declarative per-user configuration
<!--T:46-->
* [https://search.nixos.org/options?channel=unstable&query=programs.firefox NixOS options for Firefox]
<syntaxhighlight lang="nixos">
* [https://discourse.nixos.org/tag/firefox Firefox topics on NixOS Discourse]
programs.firefox.enable = true
programs.firefox.wrapperConfig = {
  pipewireSupport = true;
};
</syntaxhighlight>
Alternatively, it is possible to override the Firefox derivation with [[PipeWire]] support to it:<syntaxhighlight lang="diff">
environment.systemPackages = [
-  pkgs.firefox
+  pkgs.wrapFirefox (pkgs.firefox-unwrapped.override { pipewireSupport = true;}) {})
];


</syntaxhighlight>
== References == <!--T:67-->
</translate>
<translate>
<!--T:48-->
* Enable [https://github.com/flatpak/xdg-desktop-portal/blob/master/README.md xdg desktop integration]:
</translate>
<syntaxhighlight lang="nix">
xdg = {
  portal = {
    enable = true;
    extraPortals = with pkgs; [
      xdg-desktop-portal-wlr
      xdg-desktop-portal-gtk
    ];
  };
};
</syntaxhighlight>
<translate>
<!--T:49-->
* Set environment variables to hint Firefox to use Wayland features. E.g.:
</translate>
<translate>
<!--T:50-->
<syntaxhighlight lang="nix">
# NixOS setup
environment.sessionVariables = {
  # only needed for Sway
  XDG_CURRENT_DESKTOP = "sway";
};
</syntaxhighlight>
</translate>
<translate>
<!--T:51-->
<syntaxhighlight lang="nix">
# Home Manager setup
home.sessionVariables = {
  # only needed for Sway
  XDG_CURRENT_DESKTOP = "sway";
};
</syntaxhighlight>
</translate>
<translate>
<!--T:52-->
* Ensure that the environment variables are correctly set for the user systemd units, e.g.
</translate>
<translate>
<!--T:53-->
# Sway users might achieve this by adding the following to their Sway config file
# This ensures all user units started after the command (not those already running) set the variables
</translate>
</translate>
<syntaxhighlight lang="bash">
exec systemctl --user import-environment
</syntaxhighlight>


[[Category:Cookbook]]
[[Category:Applications]]
[[Category:Applications]]
[[Category:Web Browser]]
[[Category:Web Browser]]
Retrieved from "https://wiki.nixos.org/wiki/Firefox"