Examine source code of Fake Promo Code Generator

{
  "manifest_version": 3,
  "name": "🍕 Fake Promo Code Generator",
  "version": "1.0",
  "description": "Generate fun, fake discount codes for demo and laughs!",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "berntloise4809@outlook.com"
    }
  }
}