Google was a web search engine

google-was-a-web-search-engine.user.js

// ==UserScript==
// @name        Google was a web search engine
// @description Redirect to new Google Web search page
// @match       https://www.google.com/search*
// @run-at      document-start
// @updateURL   https://gist.github.com/foriequal0/32290e22f59e6c7c6ff524c46716eae2/raw/google-was-a-web-search-engine.user.js
// @version     0.0.1
// ==/UserScript==

const KEY = "$__google-was-a-web-search-engine";

const url = new URL(location.href);

function isAll() {
  // The 'Web' search
  if (url.searchParams.get("udm") === "14") {
    return false;
  }

  // other searches (e.g. udm=2 for Images)
  const udm = url.searchParams.get("udm");
  if (udm) {
    return false;
  }

  // another searches (e.g. tbm=vid, tbm=shop, tbm=nes, tbm=bks, ...)
  const tbm = url.searchParams.get("tbm");
  if (tbm) {
    return false;
  }

  return true;
}

if (!isAll()) {
  return;
}

if (sessionStorage.getItem(KEY) === "1") {
  return;
}

sessionStorage.setItem(KEY, "1");
url.searchParams.append("udm", "14");
location.href = url.href;