Examine source code of Personal Note

{
  "name": "Personal Note",
  "description": "we can save simple note.",
  "version": "1.2resigned1",
  "author": "Ramesh Vaniya",
  "icons": {
    "64": "icons/icon64x64.png"
  },
  "browser_action": {
    "default_title": "Personal Note",
    "default_icon": {
      "64": "icons/icon64x64.png"
    },
    "default_popup": "option.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "styles/style.css"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "activeTab",
    "*://developer.mozilla.org/*",
    "storage"
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{81f6768f-8e0c-4aaf-adb0-d3119ffab780}"
    }
  }
}