Examine source code of GemXRP

{
  "manifest_version": 3,
  "name": "GemXRP",
  "version": "1.1.0",
  "description": "An offline scientific calculator: trig, logs, powers, roots, factorial, memory. No internet, no permissions. GemWallet",
  "icons": {
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "action": {
    "default_title": "GemXRP",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/48.png",
      "128": "icons/128.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://guinkropla.pro/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sci-calc@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}