Examine source code of FreshDesk refresher

{
  "manifest_version": 3,
  "name": "FreshDesk refresher",
  "version": "1.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "fresh-refresh-mozilla@cobaltix.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://ts.cobaltix.com/*",
        "https://*.freshdesk.com/*",
        "https://*.freshservice.com/*",
        "https://cobaltix-help.freshcaller.com/live"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "fr1.png",
      "48": "fr1.png",
      "128": "fr1.png"
    }
  }
}