Examine source code of Simple Note Taker

{
  "manifest_version": 2,
  "name": "Simple Note Taker",
  "version": "1.0",
  "description": "A simple note-taking extension.",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/note-48.png",
    "default_popup": "popup.html",
    "default_title": "Take a Note"
  },
  "icons": {
    "48": "icons/note-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3caa0cf3-1c70-4ae1-9611-eef2b5181ce0}"
    }
  }
}