Examine source code of NebulaNest Trainer

{
  "manifest_version": 2,
  "name": "NebulaNest Trainer",
  "version": "1.0",
  "description": "Sharpen your knowledge of world capitals with quick interactive challenges. Test recall, track your score, and improve geographic fluency one country at a time.",
  "icons": {
    "48": "nebulanest_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "NebulaNest Trainer"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7a856559-df37-4808-b792-5f3d891abae4}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}