Examine source code of MindMath Express Trainer

{
  "manifest_version": 2,
  "name": "MindMath Express Trainer",
  "version": "1.0",
  "description": "Boost your mental math speed with quick arithmetic challenges directly in your browser pop-up window.",
  "icons": {
    "48": "mindmath_express_trainer_icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "MindMath Express Trainer"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f57250e-094d-4e9b-8f7d-9f814ee69465}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}