{
  pkgs,
  config,
  lib,
  inputs,
  ...
}:
let
  cfg = config.xyno.firefox;
in
{
  options.xyno.firefox.enable = lib.mkOption { default = false; };
  options.xyno.firefox.package = lib.mkOption {
    type = lib.types.package;
    default = inputs.zen-browser.packages.${pkgs.system}.default;
  };
  config = lib.mkIf cfg.enable {
    programs.firefox = {
      enable = true;
      package = cfg.package;
      languagePacks = [
        "en-US"
        "de"
      ];
      preferences = {
        "widget.use-xdg-desktop-portal.file-picker" = 1;
        "font.default.x-western" = "sans-serif";
        "font.name.sans-serif.x-western" = "Source Sans 3";
        "font.name.monospace.x-western" = "JetBrainsMono Nerd Font";
        "font.size.vaiable.x-western" = "14";
        "network.proxy.allow_hijacking_localhost" = true;
        "browser.newtabpage.pinned" = builtins.toJSON [
          # won't ever see that but whatever
          {
            url = "https://mastodon.catgirl.cloud";
            label = "fedi";
          }
          {
            url = "https://youtube.com";
            label = "YouTube";
          }
          {
            url = "https://tagesschau.de";
            label = "Tagesschau";
          }
          {
            url = "https://heise.de";
            label = "heise";
          }
        ];

        # things ripped from https://github.com/yokoffing/Betterfox/blob/main/Fastfox.js
        "media.memory_cache_max_size" = 65536;
        "media.cache_readahead_limit" = 7200;
        "media.cache_resume_threshold" = 3600;
        "network.http.max-connections" = 1000;
        "network.http.max-persistent-connections-per-server" = 10;
        "network.http.max-urgent-start-excessive-connections-per-host" = 5;
        "network.ssl_tokens_cache_capacity" = 10240;
      };
      policies = {
        # Updates & Background Services
        AppAutoUpdate = false;
        BackgroundAppUpdate = false;
        DisableSetDesktopBackground = true;
        DisablePocket = true;
        DisableTelemetry = true;
        DisableFirefoxAccounts = true;
        DontCheckDefaultBrowser = true;
        PasswordManagerEnabled = false;
        Proxy = {
          # set up ssh socks proxy but don't enable it
          Mode = "none";
          Locked = false;
          SOCKSProxy = "[::1]:12345";
          SOCKSVersion = 5;
          UseProxyForDns = true;
        };
        SkipTermsOfUse = true;

        ExtensionSettings =
          let
            moz = name: "https://addons.mozilla.org/firefox/downloads/latest/${name}/latest.xpi";
          in
          {
            "uBlock0@raymondhill.net" = {
              default_area = "menupanel";
              install_url = moz "ublock-origin";
              installation_mode = "force_installed";
              private_browsing = true;
            };
            "vimium-c@gdh1995.cn" = {
              default_area = "navbar";
              install_url = moz "vimium-c";
              installation_mode = "force_installed";
              private_browsing = true;

            };
            "keepassxc-browser@keepassxc.org" = {
              default_area = "navbar";
              install_url = moz "keepassxc-browser";
              installation_mode = "force_installed";
              private_browsing = true;

            };
            "{aecec67f-0d10-4fa7-b7c7-609a2db280cf}" = {
              default_area = "menupanel";
              install_url = moz "violentmonkey";
              installation_mode = "force_installed";
              private_browsing = true;

            };
            "sponsorBlocker@ajay.app" = {
              default_area = "menupanel";
              install_url = moz "sponsorblock";
              installation_mode = "force_installed";
              private_browsing = true;

            };
            "clipper@obsidian.md" = {
              default_area = "navbar";
              install_url = moz "web-clipper-obsidian";
              installation_mode = "force_installed";
              private_browsing = true;

            };
          };

      };
    };
    profiles.default = {
      bookmarks.settings = [
        {
          name = "wikipedia";
          tags = [ "wiki" ];
          keyword = "wiki";
          url = "https://en.wikipedia.org/wiki/Special:Search?search=%s&go=Go";
        }
        {
          name = "mastodon.catgirl.cloud";
          tags = [ "fedi" ];
          keyword = "fedi";
          url = "https://mastodon.catgirl.cloud";
        }
        {
          name = "YouTube";
          tags = [ "yt" ];
          keyword = "yt";
          url = "https://youtube.com";
        }
        {
          name = "tagesschau.de";
          tags = [ "news" ];
          keyword = "tagesschau";
          url = "https://tagesschau.de";
        }
        {
          name = "heise.de";
          tags = [ "news" ];
          keyword = "heise";
          url = "https://heise.de";
        }
        "seperator"
        {
          name = "Nix sites";
          toolbar = true;
          bookmarks = [
            {
              name = "homepage";
              url = "https://nixos.org/";
            }
            {
              name = "wiki";
              tags = [
                "wiki"
                "nix"
              ];
              url = "https://wiki.nixos.org/";
            }
          ];
        }

      ];

      extensions.settings = {
        "uBlock0@raymondhill.net" = {

        };
      };
      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" ];
          };
        };
      };
    };
  };
}