Examine source code of DVDFab Downloader

{
  "name": "DVDFab Downloader",
  "description": "Video Downloader",
  "version": "1.1.3",
  "manifest_version": 2,
  "default_locale": "en",
  "icons": {
    "48": "popup/static/images/icon_48.png",
    "128": "popup/static/images/icon_48.png"
  },
  "browser_action": {
    "default_title": "DVDFab Downloader",
    "default_popup": "popup/popup.html"
  },
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA+vNJizF7BhilyKkAE/K63H8snVocsPXH+uliuj/PNNB0/ietYvqiNxgLWIlmnbJbm7MhlTfKsiJux9h+VK30T5bPookJN+0wCYpylEnwFdDobOiYJHOYadXWneAJ1WSd5JvqPxfFdgTvNuCkQNx2njH3jocQDb6Eb59im68LpZQ8DVV5cNoS5fBQI/PRbU5sZISxpnNeLozDe5ITpFpTJPFIMLAF6SMKdnqAzEN9JB3lXXdSFNYi3FXcPnk7ZK3ciPZU5c6LFrrGEAkyeskWEFvfqF1l4r451cJj4nc8AS2hY4A1UYd+HmevAt40ZXJfZVGLzmw5lmGYHYyP1PdK8wIDAQAB",
  "applications": {
    "gecko": {
      "id": "addon@dvdfab.com",
      "strict_min_version": "42.0"
    }
  },
  "options_ui": {
    "page": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "popup/static/css/dlg.css",
    "popup/static/images/warning.png",
    "popup/static/images/message.png",
    "popup/static/images/icons/selected_icon.png",
    "popup/static/images/icons/file_normal.png",
    "popup/static/images/icons/close_normal.png",
    "popup/static/images/icons/close_hover.png",
    "popup/static/images/loading.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "js": [
        "popup/static/css/jquery-3.4.1.min.js",
        "content-script/index.js",
        "content-script/getPagesSource.js"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "permissions": [
    "activeTab",
    "tabs",
    "notifications",
    "nativeMessaging",
    "webRequest",
    "webRequestBlocking",
    "downloads",
    "downloads.open",
    "alarms",
    "storage",
    "http://*/*",
    "https://*/*",
    "<all_urls>"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'"
}