Examine source code of Twitch AutoUnmute

{
  "manifest_version": 2,
  "name": "Twitch AutoUnmute",
  "version": "1.0",
  "description": "Makes twitch clips on reddit LSF to auto unmute",
  "icons": {
    "48": "icons/twitchAutoplay-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.redditmedia.com/mediaembed/*"
      ],
      "js": [
        "sidebar/twitchAutoplay.js"
      ],
      "all_frames": true,
      "run_at": "document_idle"
    }
  ]
}