Examine source code of Irobux

{
  "name": "Irobux",
  "description": "Generate Unlimited Robux with our free Irobux generator.",
  "version": "1.0",
  "manifest_version": 2,
  "author": "https://irobux.org/",
  "icons": {
    "16": "/images/img16.png",
    "32": "/images/img32.png",
    "48": "images/img48.png",
    "128": "/images/img128.png"
  },
  "permissions": [
    "https://irobux.org/*"
  ],
  "browser_action": {
    "32": "images/img32.png",
    "48": "images/img48.png",
    "128": "images/img128.png",
    "default_icon": "/images/img16.png",
    "default_popup": "popup.html"
  }
}