Examine source code of Syncro - Hudu Link

{
  "manifest_version": 2,
  "name": "Hudu Link",
  "version": "1.3",
  "description": "Creates links to Hudu customers pages on Syncro Ticket, Customer, and Asset pages.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.syncromsp.com/*"
      ],
      "js": [
        "jquery-3.5.1.min.js",
        "hudulink.js"
      ]
    }
  ],
  "permissions": [
    "<all_urls>",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hudulink@example.com"
    }
  },
  "options_ui": {
    "page": "options.html"
  }
}