Examine source code of Leonardo Inspired

{
  "manifest_version" : 3 ,
  "name" : "Leonardo Inspired — Renaissance Wisdom",
  "description" : "Discover original Leonardo da Vinci-inspired reflections on curiosity, art, science, nature, and invention.",
  "version" : "1.0.0",
  "action" : {
    "default_title" : "Leonardo Inspired Wisdom",
    "default_popup" : "popup.html"
  },
  "icons" : {
    "48" : "icon-48.png",
    "128" : "icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "leonardo-inspired-wisdom@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}