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://sleazyfork.org/scripts/14254-functions/code/functions.js?version=122090
Just a test how to upload something.
Furthermore this isn't mine : copy- paste others work.
It is intended fully for private use & learn pirposes.
I'm just a noob :)