Examine source code of Faz Calculator

{
  "manifest_version": 2,
  "name": "Faz Calculator",
  "version": "13.0",
  "description": "Compact mobile UI for SarinGold like Keyvan",
  "content_scripts": [
    {
      "matches": [
        "https://www.saringold.com/user/trading/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "farazgold-calculator-unique-id@domain.com"
    }
  }
}