Examine source code of FD Calculator

{
  "manifest_version": 2,
  "name": "FD Calculator",
  "version": "1.0.0",
  "description": "Calculate fixed deposit maturity amount, interest earned, and payout estimates.",
  "browser_action": {
    "default_title": "FD Calculator",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fd-calculator@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}