Examine source code of YouTube URL Cleaner

{
  "manifest_version": 2,
  "name": "YouTube URL Cleaner",
  "version": "1.0",
  "description": "Remove unnecessary timestamps & user unfriendly codes from links within YouTube.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "cleanurl.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@yt-URL-cleaner",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}