Examine source code of Robux Changer

{
  "manifest_version": 2,
  "name": "Robux Changer",
  "version": "1.0",
  "description": "Changes the amount of robux you have locally.",
  "icons": {},
  "content_scripts": [
    {
      "matches": [
        "https://*.roblox.com/*"
      ],
      "js": [
        "change.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0dce8429-bdf7-4610-b3cf-72d0f86278d5}"
    }
  }
}