Examine source code of Cisco Phone Controller

{
  "manifest_version": 2,
  "name": "Cisco Phone Controller",
  "version": "1.7",
  "description": "Embeds a Remote Phone Control App on the Phone's internal Web Page",
  "icons": {
    "64": "icons/controller-64.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/CGI/*",
        "*://*/Device_Information.html"
      ],
      "js": [
        "jquery-3.5.1.min.js",
        "cisco-phone-controller.js"
      ]
    }
  ]
}