Examine source code of Place Roulette

{
  "manifest_version": 2,
  "name": "Place Roulette",
  "description": "This extension attempts to recreate the Place Roulette game on roblox.",
  "version": "1.0",
  "permissions": [
    "https://www.roblox.com/*"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Place Roulette",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.roblox.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2fcb1e42-ffc1-4cf8-a5f1-a71e41b503b1}"
    }
  }
}