ニコニコ動画の視聴履歴に何日前に見た動画か記載

http://let.hatelabo.jp/jigendaddy/let/hLHV2dCKgN0j.js

// ==UserScript==
// @name         nico_history_ago
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://www.nicovideo.jp/my/history
// @grant        none
// @require      http://momentjs.com/downloads/moment.js
// ==/UserScript==
var result = document.evaluate('//p[@class="posttime"]/text()', document, null, 7, null);
var g_time;
var d_time = [];
for (var i = 0; i < result.snapshotLength; i++) {
  g_time = result.snapshotItem(i).nodeValue.replace("年", "");
  g_time = g_time.replace("月", "");
  g_time = g_time.replace("日", "");
  g_time = g_time.replace(" 視聴", "");
  if (moment(g_time, "YYYYMMDD").fromNow() == moment().startOf('day').fromNow()) {
    d_time[i] = "今日";
  } else {
    d_time[i] = moment(g_time, "YYYYMMDD").fromNow();
  }
}
for (i = 0; i < d_time.length; i++) {
  d_time[i] = d_time[i].replace(" ago", "前");
  d_time[i] = d_time[i].replace("a day", "1日");
  d_time[i] = d_time[i].replace("days", "日");
  d_time[i] = d_time[i].replace("a month", "1ヶ月");
  d_time[i] = d_time[i].replace("months", "ヶ月");
  d_time[i] = d_time[i].replace(" ", "");
}
var result2 = document.evaluate('//p[@class="posttime"]/span', document, null, 7, null);
for (i = 0; i < d_time.length; i++) {
  result2.snapshotItem(i).insertAdjacentHTML("beforebegin", "(" + d_time[i] + ")");
}