Before you install, Greasy Fork would like you to know that this script contains antifeatures, which are things there for the script author's benefit, rather than yours.
سيقوم هذا البرنامج النصيبحقن الإعلانات في المواقع التي تزورها.
allowing to open many tabs without browser's knowing
اعتبارا من 
// ==UserScript==
// @name         Multi Tab Visibility
// @copyright    Ojo Ngono
// @namespace    violentmonkey/tampermonkey script 
// @version      1.2.5
// @description  allowing to open many tabs without browser's knowing 
// @author       Ojo Ngono
// @include      *
// @grant        none
// @antifeature  ads
// ==/UserScript==
(function() {
    'use strict';
    const eventsToBlock = [
        "visibilitychange",
        "webkitvisibilitychange",
        "mozvisibilitychange",
        "blur",
        "focus",
        "mouseleave"
    ];
    eventsToBlock.forEach(event_name => {
        document.addEventListener(event_name, function(event) {
            event.preventDefault();
            event.stopPropagation();
            event.stopImmediatePropagation();
        }, { capture: true, passive: false });
    });
    Object.defineProperties(document, {
        "hasFocus": { value: () => true },
        "onvisibilitychange": { value: null, writable: true },
        "visibilityState": { value: "visible", writable: false },
        "hidden": { value: false, writable: false },
        "mozHidden": { value: false, writable: false },
        "webkitHidden": { value: false, writable: false },
        "webkitVisibilityState": { value: "visible", writable: false }
    });
    var adblockDetected = false;
    var testAd = document.createElement('div');
    testAd.innerHTML = ' ';
    testAd.className = 'adsbox';
    document.body.appendChild(testAd);
    window.setTimeout(function() {
        if (testAd.offsetHeight === 0) {
            adblockDetected = true;
        }
        testAd.remove();
        if (!adblockDetected) {
            var adContainer = document.createElement('div');
            adContainer.style.width = '100%';
            adContainer.style.textAlign = 'center';
            adContainer.style.padding = '10px';
            adContainer.style.backgroundColor = '#f0f0f0';
            adContainer.style.borderBottom = '1px solid #ccc';
            adContainer.style.boxShadow = '0px 2px 10px rgba(0, 0, 0, 0.1)';
            adContainer.innerHTML = '<p><a href="https://www.highcpmgate.com/eb4z13175?key=5e5e9869283e14d8633a27de19f37968"><img src="https://drive.google.com/uc?export=view&id=1YCY5pJ-IjCCAvncvkWTMJh_fOP8wyOLX" alt="Ojo Ngono"></a></p>';
            var closeButton = document.createElement('button');
            closeButton.textContent = 'Close';
            closeButton.style.position = 'absolute';
            closeButton.style.right = '10px';
            closeButton.style.top = '10px';
            closeButton.onclick = function() {
                adContainer.remove();
            };
            adContainer.appendChild(closeButton);
            var firstElement = document.body.firstChild;
            document.body.insertBefore(adContainer, firstElement);
        } else {
            console.log('AdBlock terdeteksi!');
        }
    }, 100);
})();