Examine source code of Random Dog Photo

{
  "manifest_version": 3,
  "name": "Random Dog Photo",
  "version": "1.0",
  "description": "Muestra una foto aleatoria de un perro.",
  "permissions": [
    "https://dog.ceo/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "random-dog-photo@example.com",
      "strict_min_version": "91.0"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png",
      "48": "icon.png",
      "128": "icon.png"
    }
  }
}