Examine source code of BlooketUI

{
  "manifest_version": 2,
  "name": "BlooketUI",
  "version": "1.1",
  "description": "Automatically runs Minesraft2's Blooket Cheats GUI when 'play.blooket.com' is loaded.",
  "icons": {
    "48": "favicon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://play.blooket.com/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f46a416e-40bc-4541-b4a3-3981b43cf3cf}"
    }
  }
}