Examine source code of Quick Note Tab

{
  "manifest_version": 2,
  "name": "Quick Note Tab",
  "version": "1.0",
  "description": "Take quick notes whenever you open a new tab.",
  "permissions": [
    "storage"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e4a9ed94-9da8-49aa-b9de-e78b547326cd}"
    }
  }
}