Examine source code of Offline Note Taker

{
  "manifest_version": 2,
  "name": "Offline Note Taker",
  "version": "1.0",
  "description": "Take and save notes offline.",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Offline Note Taker"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{da709fff-f4a7-4d40-8a2f-fa31cae74067}"
    }
  }
}