Disable Page Visibility API Script
// ==UserScript==
// @name DPVS
// @namespace http://tampermonkey.net/
// @version 1.0
// @description Disable Page Visibility API Script
// @author Psyblade
// @match *://*/*
// @grant none
// ==/UserScript==
Object.defineProperties(document.wrappedJSObject,{ 'hidden': {value: false}, 'visibilityState': {value: 'visible'} });
window.addEventListener( 'visibilitychange', evt => evt.stopImmediatePropagation(), true);