Examine source code of More Chat Commands

{
  "manifest_version": 2,
  "name": "More Chat Commands",
  "version": "0.1.3",
  "description": "Adds some more interesting and useful commands to your Twitch Chat.",
  "author": "AlphaDuplo",
  "short_name": "MCC",
  "incognito": "spanning",
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "chataddon.js"
      ]
    }
  ],
  "permissions": [
    "*://*.twitch.tv/*",
    "*://*.twitchinsights.net/*",
    "webRequest"
  ],
  "icons": {
    "16": "img/icon_16.png",
    "48": "img/icon_48.png",
    "128": "img/icon_128.png"
  }
}