{
  lib,
  config,
  pkgs,
  inputs,
  ...
}:
with lib;
with lib.custom; let
  cfg = config.apps.web.librewolf;

  natsumi = pkgs.fetchFromGitHub {
    owner = "greeeen-dev";
    repo = "natsumi-browser";
    rev = "1300fd5751f4b366b0c8ec668e99ce55b1593d7b";
    hash = "sha256-08oflxcLAYoQV4O4JeWhG4JRIYcNROKdbEDNSxzK4JU=";
  };
in {
  options.apps.web.librewolf = with types; {
    enable = mkBoolOpt false "Enable or disable librewolf";

    setDefault = mkBoolOpt false "Set Librewolf as default browser";
  };

  config = mkIf cfg.enable {
    xdg.mimeApps.defaultApplications = mkIf cfg.setDefault {
      "text/html" = "librewolf.desktop";
      "x-scheme-handler/http" = "librewolf.desktop";
      "x-scheme-handler/https" = "librewolf.desktop";
    };

    home.file.".librewolf/${config.home.username}/chrome" = {
      source = "${natsumi}";
      recursive = true;
    };

    programs.librewolf = {
      enable = true;

      profiles.default = lib.mkForce {
        id = 1;
        isDefault = false;
        extensions = {
          force = true;
        };
      };

      profiles.${config.home.username} = {
        id = 0;
        isDefault = true;

        extensions = {
          force = true;
        };

        settings = {
          "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
          "sidebar.verticalTabs" = true;

          "webgl.disabled" = false;
          "privacy.resistFingerprinting" = false;
          "privacy.clearOnShutdown.history" = false;
          "privacy.clearOnShutdown.cookies" = false;
          "network.cookie.lifetimePolicy" = 0;

          "natsumi.theme.type" = "default";
        };

        search = {
          default = "SearXNG";

          engines = {
            "NixOS Options" = {
              urls = [
                {
                  template = "https://search.nixos.org/options?query={searchTerms}";
                }
              ];

              icon = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
              definedAliases = ["@nixos"];
            };

            "Nix Packages" = {
              urls = [
                {
                  template = "https://search.nixos.org/packages?query={searchTerms}";
                }
              ];

              icon = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
              definedAliases = ["@nixpkgs"];
            };

            "OpenStreetMap" = {
              urls = [
                {
                  template = "https://www.openstreetmap.org/search?query={searchTerms}";
                }
              ];

              icon = "https://www.openstreetmap.org/favicon.ico";
              definedAliases = [
                "@openstreetmap"
                "@osm"
              ];
            };

            "SearXNG" = {
              urls = [
                {
                  template = "https://search.zoeys.computer/searx/search?q={searchTerms}";
                }
              ];

              icon = "https://search.zoeys.computer/searx/static/themes/simple/img/favicon.svg";
              definedAliases = ["@searx"];
            };

            "docs.rs" = {
              urls = [
                {
                  template = "https://docs.rs/releases/search?query={searchTerms}";
                }
              ];

              icon = "https://docs.rs/-/static/favicon.ico";
              definedAliases = ["@docs"];
            };

            "crates.io" = {
              urls = [
                {
                  template = "https://crates.io/search?q={searchTerms}";
                }
              ];

              icon = "https://crates.io/assets/cargo.png";
              definedAliases = ["@crates"];
            };
          };

          force = true; # Required to prevent search engine symlink being overwritten. See https://github.com/nix-community/home-manager/issues/3698
        };
      };

      policies = {
        ExtensionSettings = with builtins; let
          extension = shortId: uuid: {
            name = uuid;
            value = {
              install_url = "https://addons.mozilla.org/en-US/firefox/downloads/latest/${shortId}/latest.xpi";
              installation_mode = "normal_installed";
            };
          };
        in
          listToAttrs [
            (extension "ublock-origin" "uBlock0@raymondhill.net")
            (extension "privacy-badger17" "jid1-MnnxcxisBPnSXQ@jetpack")
            (extension "1password-x-password-manager" "{d634138d-c276-4fc8-924b-40a0ea21d284}")
            (extension "styl-us" "{7a7a4a92-a2a0-41d1-9fd7-1e92480d612d}")
            (extension "betterttv" "firefox@betterttv.net")
            (extension "decentraleyes" "jid1-BoFifL9Vbdl2zQ@jetpack")
            (extension "canvasblocker" "CanvasBlocker@kkapsner.de")
            (extension "clearurls" "{74145f27-f039-47ce-a470-a662b129930a}")
          ];
      };
    };
  };
}