use head.js
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://sleazyfork.org/scripts/400105-head-js-2/code/headjs_2.js?version=789842
// @require https://sleazyfork.org/scripts/400105-head-js-2/code/headjs_2.js?version=789842
