Examine source code of Facebook Photo Extractor

{
  "manifest_version": 3,
  "name": "Facebook Photo Extractor",
  "version": "1.2.3",
  "description": "Extract Facebook profile and cover image URLs from your active Facebook tab.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Facebook Photo Extractor",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "downloads",
    "storage"
  ],
  "host_permissions": [
    "https://*.facebook.com/*",
    "http://*.facebook.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.facebook.com/*",
        "http://*.facebook.com/*",
        "https://*.fb.com/*",
        "http://*.fb.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "facebook-photo-extractor@ayoxic.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}