Examine source code of Expression Explorer

{
  "manifest_version": 3,
  "name": "Expression Explorer",
  "version": "1.0",
  "description": "Expand your English fluency with daily interactive idiom and expression challenges. Learn natural English phrases through engaging multiple-choice quizzes in a clean, modern popup.",
  "icons": {
    "48": "explorer_icon.png"
  },
  "action": {
    "default_popup": "index.html",
    "default_title": "Expression Explorer"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0e5a085b-6afe-483c-ab40-ec5184548434}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}