{ pkgs, ... }: {
  stylix.targets.firefox.profileNames = [ "default" ];
  programs.firefox = {
    enable = true;
    package = null; # Use system Firefox
    profiles.default = {
      settings = {
        "app.shield.optoutstudies.enabled" = false;
        "browser.bookmarks.addedImportButton" = false;
        "browser.bookmarks.showMobileBookmarks" = false;
        "browser.toolbars.bookmarks.visibility" = "newtab";
        "browser.contentblocking.category" = "strict";
        "browser.search.region" = "GB";
        "browser.search.isUS" = false;
        "browser.warnOnQuitShortcut" = false;
        "distribution.searchplugins.defaultLocale" = "en-GB";
        "doh-rollout.home-region" = "GB";
        # Catppuccin Mocha (Lavender) theme
        "extensions.activeThemeID" = "{8446b178-c865-4f5c-8ccc-1d7887811ae3}";
        "extensions.formautofill.creditCards.enabled" = false;
        "general.useragent.locale" = "en-GB";
        "intl.accept_languages" = "en-gb,en";
        "intl.locale.requested" = "en-gb,en";
        "intl.regional_prefs.use_os_locales" = false;
        "media.eme.enabled" = true;
        "privacy.webrtc.legacyGlobalIndicator" = false;
        "signon.management.page.breach-alerts.enabled" = false;
        "signon.rememberSignons" = false;
        "browser.newtabpage.pinned" = [
          {
            title = "NixOS Wiki";
            url = "https://nixos.wiki";
          }
          {
            title = "Arch Wiki";
            url = "https://wiki.archlinux.org";
          }
          {
            title = "Hyprland Wiki";
            url = "https://wiki.hyprland.org";
          }
        ];
      };
      search = {
        default = "DuckDuckGo";
        force = true;
        order = [ "DuckDuckGo" ];
        engines = {
          "MyNixOS" = {
            urls =
              [{ template = "https://mynixos.com/search?q={searchTerms}"; }];
            icon =
              "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
            definedAliases = [ "@mn" ];
          };
        };
      };
    };
  };
}