Examine source code of noRobloxReferrals

{
  "manifest_version": 2,
  "name": "noRobloxReferrals",
  "version": "1.0.0",
  "description": "Removes refPageId trackers from Roblox.",
  "content_scripts": [
    {
      "matches": [
        "*://*.roblox.com/*"
      ],
      "js": [
        "removeRefPageId.js"
      ]
    }
  ]
}