Examine source code of Fix Twitch Chat

{
  "description": "Restores the hide/unhide chat button on the command center.",
  "manifest_version": 2,
  "name": "Fix Twitch Chat",
  "version": "1.0.1",
  "homepage_url": "https://github.com/AugusDogus/Fix-Twitch-Chat",
  "icons": {
    "48": "icons/chat-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*/commandcenter"
      ],
      "js": [
        "main.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{db4746d5-552e-48bc-8c5e-49da60896e64}"
    }
  }
}