You will need to install a user script manager extension to install this script.
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive
// @require https://greasyfork.org/scripts/457009-multi-web-ptc-with-auto-captcha/code/Multi%20WEB%20PTC%20With%20AUTO%20Captcha.js?version=1132234
Multi WEB PTC With AUTO Captcha