Examine source code of Crash Roblox Site.

{
  "manifest_version": 2,
  "name": "Crash Roblox",
  "version": "1.0",
  "description": "Crashs the site.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.roblox.com/*"
      ],
      "js": [
        "crasher.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a3f41a2f-9d88-4fc8-954c-a5ed2cd462a9}"
    }
  }
}