Examine source code of Online Local Notebook

{
  "name": "Online Local Notebook",
  "manifest_version": 2,
  "version": "0.1.6",
  "icon": "notebook128128.jpg",
  "description": "This extension is used to save data temporarly with security",
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": "notebook128128.png"
  }
}