Examine source code of SWITCHcast Downloader

{
  "manifest_version": 2,
  "name": "SWITCHcast Downloader",
  "version": "1.0",
  "description": "Provides a download button for the SWITCHcast Player (OLAT)",
  "permissions": [
    "downloads"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://player.cast.switch.ch/*"
      ],
      "js": [
        "browser-polyfill.min.js",
        "content-script.js"
      ],
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "background-script.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c47db05-6251-44dd-aced-5ddda38ebdec}"
    }
  }
}