{ stdenv, fetchurl }:

stdenv.mkDerivation rec {
  pname = "User-Agent Switcher and Manager";
  version = "0.6.6";

  src = fetchurl {
    url = "https://addons.mozilla.org/firefox/downloads/file/4593736/user_agent_string_switcher-${version}.xpi";
    sha256 = "sha256-nB/uKb2JpyH3r412qZeqytAn1PKxQc2wQ+6QJ7iWdZk=";
  };

  dontUnpack = true;

  addonId = "{a6c4a591-f1b2-4f03-b3ff-767e5bedf4e7}";

  installPhase = ''
    mkdir -p $out
    cp $src $out/${addonId}.xpi
  '';
}