Examine source code of EmbedFallbackWatch

{
  "manifest_version": 3,
  "name": "EmbedFallbackWatch",
  "version": "1.0.0",
  "description": "Audit object and embed elements for fallback content, dimensions, titles, MIME hints, and risky sources.",
  "icons": {
    "48": "embedart/icon-48.png",
    "96": "embedart/icon-96.png",
    "128": "embedart/icon-128.png"
  },
  "action": {
    "default_title": "EmbedFallbackWatch",
    "default_popup": "watch/popup.html"
  },
  "permissions": [
    "activeTab",
    "scripting",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{00451a76-1c38-4bae-9b34-8efc39f17392}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}