Examine source code of QuadTV

{
  "manifest_version": 2,
  "name": "QuadTV",
  "version": "0.3.9",
  "description": "Multi-stream viewing for YouTube TV",
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "*://tv.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "background/backgroundController.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://tv.youtube.com/*"
      ],
      "js": [
        "shared/messageBus.js",
        "shared/layoutEngine.js",
        "shared/storageManager.js",
        "content/uiManager.js",
        "content/contentScript.js"
      ],
      "css": [
        "content/quadtv.css"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_title": "QuadTV",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "web_accessible_resources": [
    "content/*.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{df687596-ed5d-4db2-9772-1bd591066553}"
    }
  }
}