Examine source code of YouTube Speed Modifier

{
  "manifest_version": 3,
  "name": "YouTube Speed Modifier",
  "version": "3.2",
  "description": "Modify YouTube video playback speed with a simple interface.",
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "16": "logo_16.png",
    "48": "logo_48.png",
    "128": "logo_128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "logo_16.png",
      "48": "logo_48.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/watch*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "speed-modifier@hadrix.fr",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}