Examine source code of WHOIS Lookup

{
  "manifest_version": 3,
  "name": "WHOIS Lookup",
  "version": "2.0",
  "description": "Look up domain registration, registrar, dates, nameservers, and status from the Firefox toolbar.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "WHOIS Lookup",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "whois-lookup@kemalgoksu.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    }
  }
}