Examine source code of Netflix Speed Control

{
  "manifest_version": 2,
  "name": "Netflix Speed Control",
  "version": "1.1",
  "author": "Jonathan Sawers",
  "description": "Adds speed control for Netflix.",
  "icons": {
    "48": "icons/logo-48.png",
    "96": "icons/logo-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "netflix-speed-control@jonathansawers",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.netflix.com/*"
      ],
      "js": [
        "/content_scripts/NC.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_icon": "icons/logo-96.png",
    "default_title": "Netflix Speed Control",
    "default_popup": "popup/popup_NC.html"
  }
}