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

    policies = {
      # Updates & Background Services
      AppAutoUpdate = false;
      BackgroundAppUpdate = false;

      # Extensions
      ExtensionSettings = let
        moz = short: "https://addons.mozilla.org/firefox/downloads/latest/${short}/latest.xpi";
      in {
        "*".installation_mode = "blocked";

        "uBlock0@raymondhill.net" = {
          install_url = moz "ublock-origin";
          installation_mode = "force_installed";
          updates_disabled = true;
        };
      };

      profiles = {
        ${username} = {
          id = 0;
          isDefault = true;
          name = "${username}";
        };
      };
    };
  };
}