Examine source code of Browser Note Taker

{
  "manifest_version": 2,
  "name": "Browser Note Taker",
  "version": "1.0",
  "description": "Quickly take and save notes directly in your browser.",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/note-48.png",
    "default_popup": "popup.html",
    "default_title": "Take Notes"
  },
  "icons": {
    "48": "icons/note-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1eb4e795-cf79-4379-8aa3-7616eba40e9c}"
    }
  }
}