Examine source code of LazyShape

{
  "manifest_version": 3,
  "name": "LazyShape",
  "version": "1.0.0",
  "description": "Audit lazy-loading quality on images/iframes and detect dimension-related CLS risks.",
  "icons": {
    "48": "crest/icon-48.png",
    "96": "crest/icon-96.png",
    "128": "crest/icon-128.png"
  },
  "action": {
    "default_title": "LazyShape",
    "default_popup": "dash/view.html",
    "default_icon": {
      "48": "crest/icon-48.png"
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "clipboardWrite"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "sensor/lazy.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{91873eea-2ab5-4783-8bb1-0b3304cefe79}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}