Examine source code of Cosmos Explorer

{
  "manifest_version": 2,
  "name": "Cosmos Explorer",
  "version": "1.0",
  "description": "Challenge your space knowledge! Read astronomical clues about planets or celestial bodies and guess their names in English. A perfect tool for space enthusiasts and students exploring the wonders of the universe.",
  "icons": {
    "48": "space_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Cosmos Explorer"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d3702121-a873-4ce2-a97d-f67d545b268a}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}