Examine source code of YouTube Music Jam

{
  "manifest_version": 2,
  "name": "Youtube Music jam",
  "version": "4.0",
  "description": "Listen to YouTube Music together with friends in real-time. P2P synchronized playback with no server setup.",
  "permissions": [
    "storage",
    "*://music.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://music.youtube.com/*"
      ],
      "js": [
        "p2p-client.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "nav-helper.js"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Youtube Music jam",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "jam@musicyoutube.net",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}