Examine source code of Youtube UnHooked

{
  "name": "Youtube UnHooked",
  "version": "0.10resigned1",
  "description": "Hides parts of Youtube that are unneeded/addictive: recommendations, related videos, comments.",
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "https://www.youtube.com/*"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{f451ddaa-f59e-4447-8865-8cc1f45926bf}"
    }
  }
}