Removes ALL sponsored ads from Startpage search results reliably

Startpage - Remove Sponsored Ads (Advanced Filter)

// ==UserScript==
// @name         Startpage - Remove Sponsored Ads (Advanced Filter)
// @namespace    https://startpage.com/
// @version      2.0
// @description  Removes ALL sponsored ads from Startpage search results reliably
// @match        https://www.startpage.com/*
// @match        https://startpage.com/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    "use strict";

    function removeAds() {
        const selectors = [
            "#gcsa-top",
            "#gcsa-bottom",
            'iframe[src*="/ads"]',
            'iframe[title="Ads by Google"]',
            'iframe[name*="master"]'
        ];

        selectors.forEach(sel => {
            document.querySelectorAll(sel).forEach(el => {
                el.remove();
            });
        });
    }

    // Run as soon as possible
    document.addEventListener("DOMContentLoaded", removeAds);

    // Watch for dynamic changes (infinite scroll, page change, etc.)
    const observer = new MutationObserver(removeAds);
    observer.observe(document.documentElement, {
        childList: true,
        subtree: true
    });
})();