Examine source code of Involta Short links

{
  "manifest_version": 2,
  "name": "Involta Short links",
  "description": "Сервис сокращения ссылок",
  "version": "2.1.0",
  "background": {
    "page": "bg.html"
  },
  "icons": {
    "16": "favicon-32x32.png",
    "32": "favicon-32x32.png",
    "128": "favicon-128x128.png"
  },
  "browser_action": {
    "default_icon": "favicon-32x32.png",
    "default_popup": "popup.html",
    "default_title": "Involta Short links"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "contextMenus",
    "https://involta.ru/tools/short-links/*",
    "storage"
  ]
}