Examine source code of Image Downloader

{
  "manifest_version": 2,
  "name": "Image Downloader",
  "version": "8",
  "description": "Browse all images on a webpage in a gallery view. Filter by minimum size. Select and download images individually or in bulk.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{56806883-6626-4e78-98be-a214dca5ad91}",
      "strict_min_version": "96.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "assets/icon16.png",
      "32": "assets/icon32.png",
      "48": "assets/icon48.png",
      "96": "assets/icon96.png",
      "128": "assets/icon128.png"
    },
    "default_title": "Image Downloader",
    "default_popup": "lib/popup.html"
  },
  "icons": {
    "16": "assets/icon16.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "96": "assets/icon96.png",
    "128": "assets/icon128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "downloads"
  ]
}