Examine source code of Image Download

{
  "manifest_version": 3,
  "name": "Image Downloader",
  "version": "1.0",
  "description": "Bulk download images from a webpage with a single click.",
  "permissions": [
    "activeTab",
    "downloads",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icons/icon-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d3a9b10c-6b3e-4e7b-9a8c-5c7d91efc1df}"
    }
  }
}