Examine source code of Set Netflix Title

{
  "manifest_version": 2,
  "name": "Netflix Title",
  "short_name": "NetflixTitle",
  "version": "0.0.5",
  "description": "Changes the window title to match what you are watching",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2599748b-1ff7-478b-bf67-c3e778c4eb94}",
      "strict_min_version": "48.0"
    }
  },
  "permissions": [
    "https://*.netflix.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.netflix.com/watch/*"
      ],
      "js": [
        "adjustTitle.js"
      ]
    }
  ]
}