Examine source code of Wynncraft Shoutbox

{
  "name": "Shoutbox",
  "version": "1.5",
  "description": "It's like shoutbox but worse",
  "manifest_version": 3,
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "html/shoutbox.html"
      ],
      "matches": [
        "*://forums.wynncraft.com/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "*://forums.wynncraft.com/*"
      ],
      "js": [
        "shoutbox.js"
      ],
      "css": [
        "css/shoutbox.css"
      ]
    }
  ],
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "very_cool_shoutbox@aarontti.com"
    }
  }
}