Examine source code of Cosmic Fact Explorer

{
  "manifest_version": 2,
  "name": "Cosmic Fact Explorer",
  "version": "1.0",
  "description": "Challenge your knowledge of the universe with quick true or false space facts.",
  "icons": {
    "48": "space_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Cosmic Fact Explorer"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{283fa0ff-9a42-49d5-9480-99600012a775}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}