Examine source code of YouTube Shorts Remover

{
  "manifest_version": 2,
  "name": "YouTube Shorts Remover",
  "version": "1.0",
  "description": "Removes YouTube Shorts videos and the Shorts button from the sidebar to help you stay productive",
  "icons": {
    "48": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "hide-shorts.css"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "*://*.youtube.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2f6ee305-1f4c-470d-b0a3-ec7c24e8d23e}"
    }
  }
}