Examine source code of Online Whiteboard

{
  "manifest_version": 3,
  "name": "Online Whiteboard",
  "version": "1.0",
  "description": "Collaborate on a virtual whiteboard within the browser for brainstorming, planning, and teamwork.",
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icons/icon-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2f91a10-8c3b-4f70-b8a6-1e2c91dfb7cd}"
    }
  }
}