Examine source code of Substack Video Downloader - Download Substack Vide

{
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "version": "1.1.5",
  "default_locale": "en",
  "description": "__MSG_appDesc__",
  "permissions": [
    "downloads",
    "storage",
    "activeTab",
    "identity"
  ],
  "host_permissions": [
    "https://oztqexvwivgwakgavzoa.supabase.co/*",
    "https://www.googleapis.com/*",
    "https://googleapis.com/*",
    "https://content.dropboxapi.com/*",
    "https://api.dropboxapi.com/*",
    "https://*.yandex.net/*",
    "https://*.yandex.ru/*",
    "https://cloud-api.yandex.net/*",
    "https://storage.yandexcloud.net/*",
    "https://*.storage.yandexcloud.net/*",
    "https://stream.mux.com/*",
    "https://*.mux.com/*",
    "*://*.substack.com/*",
    "https://*.substack-post-media.s3.amazonaws.com/*",
    "https://*.amazonaws.com/*"
  ],
  "action": {
    "default_title": "__MSG_actionTitle__",
    "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"
    }
  },
  "options_page": "options.html",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "utils/constants.js",
      "utils/helpers.js",
      "services/subscriptionService.js",
      "services/cloudStorageService.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "utils/constants.js",
        "utils/helpers.js",
        "services/subscriptionService.js",
        "services/detector.js",
        "services/videoService.js",
        "services/downloadService.js",
        "services/engagement.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icons/chrome.svg"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "substack-downloader@neocrtx.ai",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo"
        ],
        "optional": [
          "technicalAndInteraction",
          "websiteActivity",
          "websiteContent"
        ]
      }
    }
  }
}