Examine source code of Iban generator

{
  "manifest_version": 3,
  "name": "Iban generator",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "ibangenerator@ad-it.be"
    }
  },
  "description": "Génère aléatoirement des ibans belges ou français",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon48x48.png"
    }
  },
  "icons": {
    "48": "icons/icon48x48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mozilla.org/*"
      ],
      "js": [
        "generator.js"
      ]
    }
  ]
}