Examine source code of Image Downloader - Zip Convert & Compress

{
  "manifest_version": 3,
  "name": "Image Downloader",
  "version": "0.1.0",
  "description": "Get images from any page: select, save as files or ZIP, or open in Toolspy Image Compressor / Converter.",
  "icons": {
    "512": "icon.png"
  },
  "action": {
    "default_title": "Image Downloader",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "512": "icon.png"
    }
  },
  "permissions": [
    "downloads",
    "storage",
    "tabs",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "vendor/zip-store.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/collect-images.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "image-downloader@toolspy.net",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}