{ lib, pkgs, ... }:
{
  programs.firefox = {
    enable = true;

    profiles.default = {
      extensions = with pkgs.nur.repos.rycee.firefox-addons; [
        ublock-origin
        private-relay
        libredirect

        reddit-enhancement-suite
        enhancer-for-youtube
        qr-code-address-bar
      ];

      settings = {
        "browser.newtabpage.pinned" = [
          {
            label = "Arch Wiki";
            url = "https://wiki.archlinux.org";
          }
          {
            label = "Translate";
            url = "https://mozhi.pussthecat.org";
          }
          {
            label = "ChatGPT";
            url = "https://chatgpt.com";
          }
          {
            label = "YouTube";
            url = "https://youtube.com";
          }
          {
            label = "Reddit";
            url = "https://old.reddit.com";
          }
          {
            label = "4chan";
            url = "https://www.4chan.org/frames";
          }
        ];

        "browser.aboutConfig.showWarning" = false;
        "browser.translations.automaticallyPopup" = false;
        "browser.tabs.inTitlebar" = 0;

        "services.sync.engine.addons" = false;

        "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
        "extensions.autoDisableScopes" = 0;
      };

      search = {
        force = true;
        default = "DuckDuckGo";

        engines = let
          makeShortcuts = let
            prefix = "@";
          in map (shortcut: prefix + shortcut);

          hideEngines = let
            hideEngine = engine: {
              name = engine;
              value = {
                metaData.hidden = true;
              };
            };
          in engines: lib.listToAttrs (map hideEngine engines);
        in (hideEngines [ "Google" "Bing" "Amazon.com" "eBay" ]) //
        {
          "Arch Wiki" = {
            urls = [{ template = "https://wiki.archlinux.org/index.php?search={searchTerms}"; }];
            iconUpdateURL = "https://wiki.archlinux.org/favicon.ico";
            definedAliases = makeShortcuts [ "archlinux" "aw" ];
          };

          "Nix Packages" = {
            urls = [{
              template = "https://search.nixos.org/packages";
              params = [
              { name = "type"; value = "packages"; }
              { name = "channel"; value = "unstable"; }
              { name = "query"; value = "{searchTerms}"; }
              ];
            }];

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

          "NixOS Wiki" = {
            urls = [{ template = "https://wiki.nixos.org/w/index.php?search={searchTerms}"; }];
            iconUpdateURL = "https://wiki.nixos.org/favicon.png";
            definedAliases = makeShortcuts [ "nixos" "nw" ];
          };

          "MyNixOS" = {
            urls = [{ template = "https://mynixos.com/search?q={searchTerms}"; }];
            iconUpdateURL = "https://mynixos.com/favicon-light.svg";
            definedAliases = makeShortcuts [ "mynixos" "mw" ];
          };

          "RuTracker" = {
            urls = [{ template = "https://rutracker.org/forum/tracker.php?nm={searchTerms}"; }];
            iconUpdateURL = "https://rutracker.org/favicon.ico";
            definedAliases = makeShortcuts [ "rutracker" "rt" ];
          };
        };
      };
    };

    policies = {
      DontCheckDefaultBrowser = true;
      DisableFirefoxStudies = true;
      DisableTelemetry = true;
      DisablePocket = true;

      EnableTrackingProtection = {
        Value = true;
        Locked = false;

        Cryptomining = true;
        EmailTracking = true;
        Fingerprinting = true;

        Exceptions = [];
      };

      FirefoxHome = {
        SponsoredTopSites = false;
        SponsoredPocket = false;
        Pocket = false;
      };

      StartDownloadsInTempDirectory = true;
    };
  };
}