Examine source code of YouTube Gradient Cleaner

{
  "manifest_version": 3,
  "name": "YouTube Gradient Cleaner",
  "version": "1.0",
  "description": "Remove gradients from the YouTube player for a cleaner experience.",
  "icons": {
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "youtube-gradient-cleaner@your-domain.com",
      "strict_min_version": "91.0"
    }
  }
}