show editorial title in document.title
// ==UserScript==
// @name AtCoder Editorial Title
// @namespace https://fuwa.dev/
// @version 0.1
// @description show editorial title in document.title
// @author ibuki2003
// @match https://atcoder.jp/contests/*/editorial
// @match https://atcoder.jp/contests/*/editorial/*
// @icon https://www.google.com/s2/favicons?domain=atcoder.jp
// @grant none
// ==/UserScript==
(function() {
'use strict';
if (/\/editorial$/.test(location.pathname)) {
document.querySelectorAll('#main-container ul li a[target=_blank]').forEach((e) => e.removeAttribute('target'))
} else {
const contest_name = document.title.substr(5);
const editorial_title = document.getElementsByTagName('h2')[0].innerText;
document.title = `${editorial_title} - ${contest_name}`;
}
})();