Blocks "visibilitychange" event on the YouTube music webpage, allowing music to still play if the browser or tab are not in focus.
// ==UserScript==
// @name Background Youtube Music
// @match *://music.youtube.com/*
// @version 1.0
// @author Rowan_CH
// @license MIT
// @description Blocks "visibilitychange" event on the YouTube music webpage, allowing music to still play if the browser or tab are not in focus.
// @namespace https://greasyfork.org/users/901201
// ==/UserScript==
document.addEventListener("visibilitychange", function(event) {event.stopImmediatePropagation();}, true);