diff --git a/modules/desktop/browsers/zen.nix b/modules/desktop/browsers/zen.nix
new file mode 100644
index 0000000..9214328
--- /dev/null
+++ b/modules/desktop/browsers/zen.nix
@@ -0,0 +1,98 @@
+{ inputs, options, config, lib, pkgs, ... }:
+let
+  inherit (builtins) toJSON;
+  inherit (lib.attrsets) attrValues mapAttrsToList;
+  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.strings) concatStrings;
+
+  cfg = config.modules.desktop.browsers.firefox;
+in {
+  options.modules.desktop.browsers.firefox = let
+    inherit (lib.options) mkEnableOption;
+    inherit (lib.types) attrsOf oneOf bool int lines str;
+    inherit (lib.my) mkOpt mkOpt';
+  in {
+    enable = mkEnableOption "Gecko-based libre browser";
+    privacy.enable = mkEnableOption "Privacy Focused Firefox fork";
+
+    profileName = mkOpt str config.user.name;
+    settings = mkOpt' (attrsOf (oneOf [bool int str])) {} ''
+      Firefox preferences set in <filename>user.js</filename>
+    '';
+    extraConfig = mkOpt' lines "" ''
+      Extra lines to add to <filename>user.js</filename>
+    '';
+    userChrome = mkOpt' lines "" "CSS Styles for Firefox's interface";
+    userContent = mkOpt' lines "" "Global CSS Styles for websites";
+  };
+
+  config = mkMerge [
+    (mkIf (config.modules.desktop.type == "wayland") {
+      environment.variables.MOZ_ENABLE_WAYLAND = "1";
+    })
+
+    (mkIf cfg.enable {
+      user.packages = let
+        inherit (pkgs) makeDesktopItem;
+        inherit (inputs.zen.packages.${pkgs.system}.specific) zen;
+      in [
+        zen
+        (makeDesktopItem {
+          name = "zen";
+          desktopName = "Zen";
+          genericName = "Launch a Zen instance";
+          icon = "zen";
+          exec = "${lib.getExe zen-bin}";
+          categories = ["Network" "WebBrowser"];
+        })
+      ];
+
+      # Use a stable profile name so we can target it in themes
+      home.file = let
+        cfgPath = ".mozilla/firefox";
+      in {
+        firefox-profiles = {
+          target = "${cfgPath}/profiles.ini";
+          text = ''
+            [Profile0]
+            Name=default
+            IsRelative=1
+            Path=${cfg.profileName}.default
+            Default=1
+
+            [General]
+            StartWithLastProfile=1
+            Version=2
+          '';
+        };
+
+        user-js = mkIf (cfg.settings != {} || cfg.extraConfig != "") {
+          target = "${cfgPath}/${cfg.profileName}.default/user.js";
+          text = ''
+            ${concatStrings (mapAttrsToList (name: value: ''
+                user_pref("${name}", ${toJSON value});
+              '')
+              cfg.settings)}
+            ${cfg.extraConfig}
+          '';
+        };
+
+        user-chrome = mkIf (cfg.userChrome != "") {
+          target = "${cfgPath}/${cfg.profileName}.default/chrome/userChrome.css";
+          text = cfg.userChrome;
+        };
+
+        user-content = mkIf (cfg.userContent != "") {
+          target = "${cfgPath}/${cfg.profileName}.default/chrome/userContent.css";
+          text = cfg.userContent;
+        };
+      };
+    })
+
+    (mkIf cfg.privacy.enable {
+      user.packages = attrValues {
+        inherit (pkgs) librewolf;
+      };
+    })
+  ];
+}