Unblock pages broken by dom.enable_performance_observer = false
// ==UserScript==
// @name Fake PerformanceObserver
// @description Unblock pages broken by dom.enable_performance_observer = false
// @author xiaoxiaoflood
// @match https://*.github.com/*
// @match https://help.shopee.com.br/*
// @version 2022.03.29
// @run-at document-start
// @namespace https://greasyfork.org/users/5802
// ==/UserScript==
unsafeWindow.PerformanceObserver = exportFunction(function(){}, unsafeWindow);