Add &udm=14 to Google URL if it doesn't already exist
// ==UserScript==
// @name Google udm14
// @namespace http://tampermonkey.net/
// @version 1.1
// @description Add &udm=14 to Google URL if it doesn't already exist
// @author niceEli
// @match *://www.google.com/search*
// @grant none
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// Check if the URL already has the udm parameter
const url = new URL(window.location.href);
const udmParam = url.searchParams.get('udm');
if (udmParam === null) {
// If udm parameter does not exist, add udm=14
url.searchParams.append('udm', '14');
window.location.replace(url.href);
} else if (udmParam !== '2' && udmParam !== '14') {
// If udm parameter exists and is not 2 or 14, update it to 14
url.searchParams.set('udm', '14');
window.location.replace(url.href);
}
})();