Examine source code of Twitch Coin

{
  "manifest_version": 2,
  "name": "Twitch Coin",
  "version": "0.1.2",
  "description": "Automatically gather your Twitch Coin while watching your favorite streamer.",
  "homepage_url": "https://github.com/aminnairi/twitch-coin#readme",
  "icons": {
    "16": "icons/icon16.png",
    "24": "icons/icon24.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "scripts/twitch-coin.js"
      ]
    }
  ]
}