Examine source code of NoShorts

{
  "manifest_version": 2,
  "name": "NoShorts",
  "version": "2.0",
  "description": "Removes YouTube Shorts from subscription box.",
  "icons": {
    "512": "icons/cancel.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/feed/*"
      ],
      "js": [
        "noshorts.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e9af38f9-0199-44b3-a244-e96ab90b3032}"
    }
  }
}