Examine source code of Youtube Auto-focus

{
  "manifest_version": 2,
  "name": "Youtube Auto-focus",
  "description": "This add-on will auto focus the search bar on youtube, this will improve search functionality.",
  "version": "1.1resigned1",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "assets/js/jquery-3.3.1.min.js",
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e7775b5-ed2e-4b61-8467-d3c4ae5045e3}"
    }
  }
}