Examine source code of Pakistan Phone Toolkit

{
  "manifest_version": 3,
  "name": "Pakistan Phone Toolkit",
  "version": "1.0.0",
  "description": "Find Pakistani city area codes, identify mobile network prefixes, and format numbers to +92 format. Fully offline, no tracking.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "Pakistan Phone Toolkit"
  },
  "permissions": [],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "author": "Pakistan Phone Toolkit",
  "browser_specific_settings": {
    "gecko": {
      "id": "pakistan-phone-toolkit@offline-tools.app",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}