Examine source code of Domain Inspector

{
  "manifest_version": 3,
  "name": "Domain Inspector",
  "version": "1.4",
  "description": "Domain Inspector — расширение для Chrome, которое показывает все домены.",
  "icons": {
    "16": "icon.png",
    "32": "icon.png",
    "128": "icon.png"
  },
  "action": {
    "default_popup": "extension.html",
    "default_title": "Показать домены"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "page-patch.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "domain-inspector@example.com",
      "strict_min_version": "109.0"
    }
  }
}