gif.js from https://github.com/jnordberg/gif.js
As of
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/2963/8595/gifjs.js
/**
*
* I didn't create this, just modified it to allow it running in userscript.
* Auther : https://github.com/jnordberg/gif.js
*
* source and source map from
* https://github.com/jnordberg/gif.js/tree/master/dist
*
* use GIF_worker_URL to assign the worker script path
*
*/
