Examine source code of Simple YTDL

{
  "manifest_version": 2,
  "name": "Simple YouTube Downloader",
  "version": "1.0",
  "description": "Allows for the downloading of YouTube videos with a single click.",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "downloader.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "download.svg"
  ],
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{33d6457a-408e-4cbf-935a-9e310eb11ea3}"
    }
  }
}