Examine source code of Twitch chat overlay

{
  "manifest_version": 2,
  "name": "Twitch chat overlay",
  "version": "1.4.2",
  "description": "Transparent chat overlay for Twitch.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{50b7982f-38b8-4bc7-91fe-07917ee7ceec}"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "90": "icons/icon90.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "jquery-3.6.0.min.js",
        "theme.js",
        "script.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ]
}