Examine source code of IP Whois

{
  "name": "IP Whois",
  "version": "2.0.9",
  "description": "View info about IP, DNS records, SSL, country flag, domain whois, location, stats and more of any website.",
  "manifest_version": 2,
  "icons": {
    "16": "src/assets/icons/icon16.png",
    "32": "src/assets/icons/icon32.png",
    "48": "src/assets/icons/icon48.png",
    "128": "src/assets/icons/icon128.png"
  },
  "background": {
    "scripts": [
      "src/background/index.js"
    ],
    "persistent": false
  },
  "page_action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "src/assets/icons/icon16.png",
      "32": "src/assets/icons/icon32.png",
      "48": "src/assets/icons/icon48.png",
      "128": "src/assets/icons/icon128.png"
    },
    "show_matches": [
      "<all_urls>"
    ]
  },
  "permissions": [
    "storage",
    "alarms",
    "tabs",
    "webNavigation"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7f6f0097-3add-4634-ad83-b789a91439d5}"
    }
  }
}