Examine source code of Extension Vitality

{
  "manifest_version": 2,
  "author": "Shytoos",
  "name": "Vitality",
  "short_name": "Vitality",
  "description": "__MSG_appDesc__",
  "homepage_url": "https://vitality.gg/",
  "default_locale": "en",
  "version": "1.1.0",
  "background": {
    "persistent": true,
    "scripts": [
      "js/libs/jquery.js",
      "js/libs/jquery.browser.min.js",
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_title": "Vitality - __MSG_backgroundOffline__",
    "default_icon": "images/icon_off.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "32": "images/32.png",
    "64": "images/64.png",
    "128": "images/128.png"
  },
  "permissions": [
    "background",
    "notifications",
    "storage",
    "*://extension.vitality.gg/*",
    "*://*.ytimg.com/*"
  ],
  "options_ui": {
    "page": "popup.html?options"
  },
  "update_url": "https://clients2.google.com/service/update2/crx"
}