Examine source code of IP and Country

{
  "manifest_version": 2,
  "name": "IP and Country Flag",
  "version": "1.0",
  "description": "Displays the user's IP address and country flag in a popup.",
  "permissions": [
    "activeTab",
    "https://api.ipgeolocation.io/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ca021c61-990d-4646-8561-51e1b897f343}"
    }
  }
}