Examine source code of IP Flag

{
  "manifest_version": 2,
  "name": "IP Flag",
  "version": "1.0",
  "description": "Shows the country flag of your current IP address in the toolbar.",
  "permissions": [
    "activeTab",
    "storage",
    "alarms"
  ],
  "browser_action": {
    "default_title": "IP Flag",
    "default_icon": {
      "32": "icons/icon-32.png"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ipflag@xrpscan.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}