Filters out specified domains from multiple search engines
// ==UserScript==
// @name Search Engine Result Filter
// @namespace U2VhcmNoIEVuZ2luZSBSZXN1bHQgRmlsdGVy
// @version 2.0
// @description Filters out specified domains from multiple search engines
// @author smed79
// @license GPLv3
// @icon https://raw.githubusercontent.com/smed79/search-engine-result-filter/refs/heads/main/icon.png
// @match *://*.google.com/search*
// @match *://*.bing.com/search*
// @match *://*.yandex.com/search*
// @match *://*.baidu.com/s?*
// @match *://*.startpage.com/*/search*
// @match *://duckduckgo.com/?*
// @match *://priv.au/search*
// @grant none
// ==/UserScript==
// How to Use?
// https://github.com/smed79/search-engine-result-filter#how-to-use
(function() {
'use strict';
// Configuration: List of domains to block with wildcard support
const BLOCKED_DOMAINS = [
'*.example.com',
'www.example.org',
'example.net'
// Add more domains here
];
// Search engine-specific result container selectors
// You can use comma-separated selectors to target multiple containers
const SEARCH_ENGINES = {
google: '.xpd, .A6K0A',
bing: '.b_algo',
yandex: '.serp-item',
baidu: '.result',
duckduckgo: 'article, [data-testid="result"]',
startpage: '.result, .css-z73qjy',
priv: 'article, .result'
// Add more search engines here
};
// Pre-compile blocked domains for fast checking
const compiledBlocklist = BLOCKED_DOMAINS.map(pattern => {
if (pattern.startsWith('*.')) {
const root = pattern.replace('*.', '');
return (hostname) => hostname === root || hostname.endsWith('.' + root);
}
return (hostname) => hostname === pattern || hostname === 'www.' + pattern;
});
// Function to detect current search engine
function detectSearchEngine() {
const hostname = window.location.hostname;
if (hostname.includes('google.')) return 'google';
if (hostname.includes('bing.')) return 'bing';
if (hostname.includes('yandex.')) return 'yandex';
if (hostname.includes('baidu.')) return 'baidu';
if (hostname.includes('duckduckgo.')) return 'duckduckgo';
if (hostname.includes('startpage.')) return 'startpage';
if (hostname.includes('priv.')) return 'priv';
return null;
}
const currentEngine = detectSearchEngine();
if (!currentEngine) return; // Exit immediately if no engine detected
const selector = SEARCH_ENGINES[currentEngine];
// Fast check against compiled blocklist
function isBlockedDomain(href) {
try {
const hostname = new URL(href).hostname;
return compiledBlocklist.some(checkFn => checkFn(hostname));
} catch {
return false;
}
}
// Highly Optimized Result Hiding
function hideBlockedResults() {
// Only select containers we haven't checked yet
const containers = document.querySelectorAll(`${selector}:not([data-filtered="true"])`);
containers.forEach(container => {
// Mark as checked so we never waste CPU processing this element again
container.dataset.filtered = 'true';
// Find the main links inside the container
const links = container.querySelectorAll('a[href]');
for (const link of links) {
if (isBlockedDomain(link.href)) {
container.style.display = 'none';
break; // Stop checking links once we know the container should be hidden
}
}
});
}
// Run on initial load
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', hideBlockedResults);
} else {
hideBlockedResults();
}
// Debounced Observer for dynamic/infinite scrolling content
let timeout;
const observer = new MutationObserver(() => {
clearTimeout(timeout);
timeout = setTimeout(() => {
requestAnimationFrame(hideBlockedResults);
}, 150); // 150ms debounce is perfectly smooth for human eyes
});
// Attach to documentElement to avoid crashes
if (document.documentElement) {
observer.observe(document.documentElement, { childList: true, subtree: true });
}
})();