Examine source code of Minimal YouTube Enhancer

{
  "manifest_version": 3,
  "name": "Minimal YouTube Enhancer",
  "version": "1.0.1",
  "description": "Minimal YouTube enhancer: speed control, volume booster, default resolution, theatre mode. Controls below video.",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://www.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/watch*"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/styles.css"
      ]
    }
  ],
  "action": {
    "default_title": "Minimal YouTube Enhancer"
  },
  "icons": {
    "48": "icons/mye48.png",
    "128": "icons/mye128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "minimal-youtube-enhancer@cooperelixer"
    }
  }
}