Examine source code of Youtube Mobile Helper

{
  "manifest_version": 2,
  "name": "Youtube Mobile Helper",
  "description": "An extension to help users manipulate Youtube video playback rate and time on mobile",
  "version": "1.0.1resigned1",
  "content_scripts": [
    {
      "matches": [
        "https://m.youtube.com/*"
      ],
      "js": [
        "injected/youtube-helper.js"
      ],
      "css": [
        "injected/youtube-helper.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{377a0fae-78ca-41ca-9b08-92144625cbbe}"
    }
  }
}