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Imgur WebArchive redirect on 404

Detect a 404 page at imgur.com and redirect it to web.archive.org in hopes that it is stored there

// ==UserScript==
// @name         Imgur WebArchive redirect on 404
// @namespace    http://tampermonkey.net/
// @version      2024-04-11
// @description  Detect a 404 page at imgur.com and redirect it to web.archive.org in hopes that it is stored there
// @author       VinniTheP00h
// @match        imgur.com/error/404
// @icon         https://www.google.com/s2/favicons?sz=64&domain=imgur.com
// @grant        none
// @license      GNU GPLv3
// ==/UserScript==

(function() {
    'use strict';

    var url = window.frames.top.document.referrer;
    var arch = "https://web.archive.org/" + url;
    document.location = arch;
})();