IITCのデータを救出！旧URLからデータを取り出します。https://www.ingress.com/ を開いて、「Rescue!!」ボタンを押す

rescue-iitc-data.user.js

// ==UserScript==
// @name         rescue-iitc-data.user.js
// @namespace    https://plus.google.com/+いしだなおと
// @version      0.1
// @description  To Extract IITC Data from localStorage
// @author       isnot
// @match        https://www.ingress.com/
// @grant        none
// ==/UserScript==


// * 処理を開始するためのボタンを配置する
// * メインのウインドウを表示する
//   ** localStorageのキーを列挙
// * 指定したキーの値を取り出して、画面に表示

(function () {
  'use strict';

  // 主なプラグインの、バックアップしたいキー
  const well_known_keys = {
    'iitc-plugin-fusen' : '★ Fusen',
    'plugin-bookmarks' : '★ Bookmarks (plugin-bookmarks)',
    'plugin-draw-tools-layer' : '★ Draw Tools',
    'plugin-keys-data' : '★ Keys (plugin-keys-data)',
  };

  const listUpKeys = () => {
    let keyNames = {};
    const keys_a = Object.keys(localStorage);
    keys_a.forEach((k) => {
      if (localStorage.hasOwnProperty(k)) {
        keyNames[k] = k;
      }
    });

    Object.keys(well_known_keys).forEach((w) => {
      keyNames[w] = well_known_keys[w];
    });

    console.log(keyNames); // DEBUG
    return keyNames;
  };

  const getFormSelect = () => {
    const form = document.createElement('form');
    const select = document.createElement('select');
    select.id = 'keySelect';

    const items = listUpKeys();
    Object.keys(items).forEach((name) => {
      const option = document.createElement('option');
      option.value = name;
      const label = document.createTextNode(items[name]);
      option.appendChild(label);
      select.appendChild(option);
    });
    select.addEventListener('change', changeKey, false);
    form.appendChild(select);
    return form;
  };

  const setupDialog = () => {
    const div = document.createElement('div');
    div.textContent = 'あらゆる意味で無保証です！';

    const form = getFormSelect();
    div.appendChild(form);

    const div_data = document.createElement('div');
    div_data.id = 'dataArea';
    div.appendChild(div_data);
    div_data.style.border = '2px black solid';
    div_data.style.padding = '5px';

    const body = document.evaluate('//*[@id="site"]/footer/div[2]', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    body.snapshotItem(0).appendChild(div);
  };

  const changeKey = (e) => {
    const select = document.getElementById('keySelect');
    const idx = select.selectedIndex;
    const area = document.getElementById('dataArea');

    try {
      const key = select.options[idx].value;
      area.textContent = localStorage.getItem(key);
    } catch (e) {
      console.log( 'Error: ' + e );
    }
  };

  // 処理開始するボタンを設置
  const key_node = document.evaluate('//*[@id="site"]/footer', document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
  const new_div = document.createElement('div');
  new_div.className = 'footer__container';
  new_div.setAttribute('style', 'background:#fff;color:#000;');
  const alink = document.createElement('button');
  alink.addEventListener('click', setupDialog, false);
  alink.textContent = 'Rescue!!';
  new_div.appendChild(alink);
  key_node.snapshotItem(0).appendChild(new_div);
  //console.log(key_node.snapshotItem(0).textContent);

})();