(function() 'use strict'; // List of blacklisted keywords or domains const adKeywords = [ 'doubleclick.net', 'googleads', 'adservice', 'analytics.js', 'popunder', 'track-analytics' ]; // Helper to check if a URL contains an ad keyword const isAdUrl = (url) => if (!url) return false; return adKeywords.some(keyword => url.includes(keyword)); ; // 1. Intercept Fetch API const originalFetch = window.fetch; window.fetch = async function(...args) const url = args[0]; if (typeof url === 'string' && isAdUrl(url)) console.log(`[AdBlock] Blocked fetch request to: $url`); return new Response('', status: 404, statusText: 'Not Found' ); return originalFetch.apply(this, args); ; // 2. Intercept XMLHttpRequest (XHR) const originalOpen = XMLHttpRequest.prototype.open; XMLHttpRequest.prototype.open = function(method, url, ...args) if (typeof url === 'string' && isAdUrl(url)) console.log(`[AdBlock] Blocked XHR request to: $url`); // Overwrite send to prevent execution this.send = function() this.readyState = 4; this.status = 404; ; return originalOpen.apply(this, [method, url, ...args]); ; )(); Use code with caution. Strategy 2: Dynamic DOM Purging via MutationObserver
While Tampermonkey is a safe tool, you should be cautious about the scripts you install. adblock script tampermonkey full
Preventing the browser from downloading ad assets to save bandwidth. Step-by-Step Code Walkthrough (function() 'use strict'; // List of blacklisted keywords
Beyond the Extension: Mastering Custom Ad-Blocking with Tampermonkey Strategy 2: Dynamic DOM Purging via MutationObserver While
Click on the script, then click the green "Install" button.
Adblock lists and browser extensions once cast a simple, moral line: block intrusive ads, protect privacy, and reclaim a faster, cleaner web. But when that line is recoded into user scripts—Tampermonkey snippets promising “full” adblock functionality—the boundary between consumer empowerment and technical arms race blurs.