Examine source code of YouTube™ Stop Button

{
  "name": "YouTube™ Stop Button",
  "description": "__MSG_description__",
  "default_locale": "en",
  "version": "0.2.9",
  "manifest_version": 3,
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "*://www.youtube.com/*"
  ],
  "background": {
    "service_worker": "worker.js",
    "scripts": [
      "worker.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "data/inject.js"
      ],
      "css": [
        "data/inject.css"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "homepage_url": "https://webextension.org/listing/youtube-tools.html?from=stop-button",
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png",
    "512": "data/icons/512.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ed4d96b5-8bd9-4fb2-ab5a-f430070d1914}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}