diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 77632ca4b33b4..6d66bae4e6431 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -330,6 +330,7 @@ in {
   ferretdb = handleTest ./ferretdb.nix {};
   filesender = handleTest ./filesender.nix {};
   filesystems-overlayfs = runTest ./filesystems-overlayfs.nix;
+  firedragon = handleTest ./firefox.nix { firefoxPackage = pkgs.firedragon; };
   firefly-iii = handleTest ./firefly-iii.nix {};
   firefly-iii-data-importer = handleTest ./firefly-iii-data-importer.nix {};
   firefox = handleTest ./firefox.nix { firefoxPackage = pkgs.firefox; };
diff --git a/pkgs/applications/networking/browsers/firedragon/default.nix b/pkgs/applications/networking/browsers/firedragon/default.nix
new file mode 100644
index 0000000000000..acb4a604c4118
--- /dev/null
+++ b/pkgs/applications/networking/browsers/firedragon/default.nix
@@ -0,0 +1,75 @@
+{
+  stdenv,
+  lib,
+  fetchFromGitLab,
+  buildMozillaMach,
+  nixosTests,
+}:
+
+(
+  (buildMozillaMach rec {
+    pname = "firedragon";
+    packageVersion = "11.19.1";
+    applicationName = "FireDragon";
+    binaryName = "firedragon";
+    branding = "browser/branding/official";
+    requireSigning = false;
+    allowAddonSideload = true;
+
+    # Must match the contents of `browser/config/version.txt` in the source tree
+    version = "128.4.0";
+
+    src = fetchFromGitLab {
+      owner = "garuda-linux";
+      repo = "firedragon";
+      fetchSubmodules = true;
+      rev = "v${packageVersion}";
+      hash = "";
+    };
+
+    extraConfigureFlags = [
+      "--with-app-name=${pname}"
+      "--with-app-basename=${applicationName}"
+      "--with-unsigned-addon-scopes=app,system"
+      "--enable-proxy-bypass-protection"
+    ];
+
+    meta = {
+      description = "FireDragon is a browser based on the excellent Floorp browser";
+      homepage = "https://firedragon.garudalinux.org/";
+      maintainers = with lib.maintainers; [ liberodark ];
+      platforms = lib.platforms.unix;
+      badPlatforms = lib.platforms.darwin;
+      broken = stdenv.buildPlatform.is32bit;
+      # since Firefox 60, build on 32-bit platforms fails with "out of memory".
+      # not in `badPlatforms` because cross-compilation on 64-bit machine might work.
+      maxSilent = 14400; # 4h, double the default of 7200s (c.f. #129212, #129115)
+      license = lib.licenses.mpl20;
+      mainProgram = "firedragon";
+    };
+    tests = {
+      inherit (nixosTests) firedragon;
+    };
+  }).override
+  {
+    # Upstream build configuration can be found at
+    # .github/workflows/src/linux/shared/mozconfig_linux_base
+    privacySupport = true;
+    webrtcSupport = true;
+    enableOfficialBranding = false;
+    googleAPISupport = true;
+    mlsAPISupport = true;
+  }
+).overrideAttrs
+  (prev: {
+    MOZ_DATA_REPORTING = "";
+    MOZ_TELEMETRY_REPORTING = "";
+
+    # Upstream already includes some of the bugfix patches that are applied by
+    # `buildMozillaMach`. Pick out only the relevant ones for Floorp and override
+    # the list here.
+    patches = [
+      ../firefox/env_var_for_system_dir-ff111.patch
+      ../firefox/no-buildconfig-ffx121.patch
+    ];
+  })
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ea3f384bda6a0..e0fe654febb4c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -29352,6 +29352,10 @@ with pkgs;
 
   floorp = wrapFirefox floorp-unwrapped { };
 
+  firedragon-unwrapped = callPackage ../applications/networking/browsers/firedragon { };
+
+  firedragon = wrapFirefox firedragon-unwrapped { };
+
   fomp = callPackage ../applications/audio/fomp { };
 
   formatter = callPackage ../applications/misc/formatter { };