Google /url redirect skipper

google-url-redirect.user.js

// ==UserScript==
// @name         Google /url redirect skipper
// @namespace    https://lalibi.dev/
// @version      0.1.1
// @description  Automatically redirect from Google's /url wrapper to the real target URL
// @author       lalibi
// @match        https://www.google.com/url*
// @match        https://www.google.*/url*
// @run-at       document-start
// @grant        none
// @downloadURL  https://gist.githubusercontent.com/lalibi/b08de28db17eab05b86c038c5f32f62d/raw/
// @updateURL    https://gist.githubusercontent.com/lalibi/b08de28db17eab05b86c038c5f32f62d/raw/
// @icon         https://www.google.com/s2/favicons?sz=128&domain=google.com
// ==/UserScript==

(function () {
    'use strict';

    // Support Google's most common param names that hold the real URL
    const params = new URLSearchParams(window.location.search);
    const candidateParams = ['q', 'url', 'continue'];

    let target = null;

    for (const key of candidateParams) {
        const value = params.get(key);
        if (value) {
            target = value;
            break;
        }
    }

    if (!target) {
        return; // nothing to do
    }

    try {
        // In case it's URL-encoded
        target = decodeURIComponent(target);
    } catch (e) {
        // ignore decode errors, just try the raw value
    }

    // Simple sanity check: require a scheme like http/https
    if (!/^https?:\/\//i.test(target)) {
        return;
    }

    // Replace so that the /url page doesn't stay in history
    window.location.replace(target);
})();