nixos/users/home-manager/firefox.nix

{ pkgs, firefox-addons, ... }:
{
  programs.firefox = {
    enable = true;
    languagePacks = [
      "zh-CN"
      "en-US"
    ];
    profiles.default = {
      name = "default";
      isDefault = true;
      extensions = with (pkgs.callPackage firefox-addons { }); [
        immersive-translate
      ];
      search = {
        force = true;
        default = "DuckDuckGo";
        engines = {
          "Nix Packages" = {
            urls = [
              {
                template = "https://search.nixos.org/packages";
                params = [
                  {
                    name = "type";
                    value = "packages";
                  }
                  {
                    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}";
                  }
                ];
              }
            ];
            definedAliases = [ "@no" ];
          };
          "Home Manager Options" = {
            urls = [
              {
                template = "https://home-manager-options.extranix.com";
                params = [
                  {
                    name = "query";
                    value = "{searchTerms}";
                  }
                  {
                    name = "release";
                    value = "master";
                  }
                ];
              }
            ];
            definedAliases = [ "hm" ];
          };
          "NUR Packages" = {
            urls = [
              {
                template = "https://nur.nix-community.org/";
              }
            ];
            definedAliases = [ "nu" ];
          };
          "Nix Flakes" = {
            urls = [
              {
                template = "https://search.nixos.org/flakes";
                params = [
                  {
                    name = "channel";
                    value = "unstable";
                  }
                  {
                    name = "query";
                    value = "{searchTerms}";
                  }
                ];
              }
            ];
            definedAliases = [ "nf" ];
          };
          "NixOS Wiki" = {
            urls = [
              {
                template = "https://nixos.wiki/index.php";
                params = [
                  {
                    name = "search";
                    value = "{searchTerms}";
                  }
                ];
              }
            ];
            definedAliases = [ "nw" ];
          };
          "Bing".metaData.hidden = true;
          "Google".metaData.alias = "@g"; # builtin engines only support specifying one additional alias
        };
      };
    };
  };
}