Examine source code of YouTube Background Play

{
  "manifest_version": 2,
  "name": "YouTube Background Play",
  "version": "1.0.0",
  "description": "Keep YouTube videos playing when you switch tabs or minimize your browser. Perfect for listening to music or podcasts in the background.",
  "author": "Your Name",
  "homepage_url": "https://github.com/yourusername/youtube-background-play",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0bcd2a52-5734-4bc5-b8c5-66eeefa7a3cf}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "permissions": [
    "*://*.youtube.com/*"
  ]
}