Tampermonkey script to remove promoted tweets

nopromotedtweets.js

// ==UserScript==
// @name         Twitter Promoted
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Get rid of stupid promoted tweets
// @author       Mac Gaulin
// @match        http*://twitter.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    // source: https://stackoverflow.com/a/59687531
    function contains(selector, text) {
        var elements = document.querySelectorAll(selector);
        return Array.from(elements).filter(function(element) {
            return RegExp(text).test(element.textContent);
        });
    }

    function removePromoted() {
        let found = contains("span", "^Promoted");
        console.log("Found " + found.length + " promoted tweets.");

        for (let i = 0; i < found.length; i++) {
            let elem = found[i];
            let art = elem.closest("article");
            if (art) {
                art.style.display = 'none';
                art.parentNode.style.backgroundColor = "red";
                console.log("Hid promoted tweet " + i);
            }
            else {
                console.log("Promoted tweet wasn't an article", elem);
            }
        }
    }

    setTimeout(removePromoted, 7000);
})();