Examine source code of Netflix speeder

{
  "description": "Adds playback speed seelctors to netflix\nto use this feature simply press p\nneeds to be cahnged every time between episodes/movies or on page reload",
  "manifest_version": 2,
  "name": "Netfl1x speeder",
  "version": "1.0",
  "homepage_url": "https://github.com/el-germi/NetflixSpeeder",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.netflix.com/watch/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ]
}