Small Tampermonkey Userscript to show current year citation estimate

Google Scholar Current Year Citation Estimate.user.js

// ==UserScript==
// @name         Google Scholar Current Year Citation Estimate
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://scholar.google.pt/citations?*
// @match        https://scholar.google.com/citations?*
// @icon         https://www.google.com/s2/favicons?domain=google.pt
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var year_citations = parseInt(document.querySelector("a.gsc_g_a:last-child > span:nth-child(1)").textContent)
    var total_citations = parseInt(document.querySelector("#gsc_rsb_st > tbody:nth-child(2) > tr:nth-child(1) > td:nth-child(2)").textContent)
    var today = new Date();
    var day_of_the_year = Math.ceil((today - new Date(today.getFullYear(),0,1)) / 86400000);
    var year_estimated_citations = Math.round(year_citations / day_of_the_year * 365);
    var total_estimated_citations = (total_citations + year_estimated_citations - year_citations);
    var str_citations = year_citations + "\ny:" + year_estimated_citations + "\nt:" + total_estimated_citations;
    document.querySelector("a.gsc_g_a:last-child > span:nth-child(1)").textContent = str_citations;
})();