Examine source code of SubNet Classer

{
  "manifest_version": 2,
  "name": "SubNet Classer",
  "version": "1.0",
  "description": "Quick reference for IPv4 classes, CIDR, binary, and IPv6 basics. Analyze IPs and view subnet tips. Perfect for network admins and students.",
  "permissions": [
    "activeTab",
    "storage",
    "clipboardWrite"
  ],
  "sidebar_action": {
    "default_title": "SubNet Classer",
    "default_panel": "sidebar.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{24bfe9b5-99c8-4304-b410-bd0c1d39cd1f}"
    }
  }
}