Examine source code of YT Auto Speed

{
  "manifest_version": 2,
  "name": "YT Auto Speed",
  "version": "1.1",
  "description": "Automatically sets YouTube video playback speed. Skips Shorts.",
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-auto-speed@jnpcreates",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "*://*.youtube.com/*",
    "storage"
  ],
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "YT Auto Speed",
    "default_icon": "icons/icon.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}