Examine source code of Ugly Twitch

{
  "manifest_version": 2,
  "name": "Ugly Twitch",
  "version": "1.0",
  "description": "Why did Twitch suddenly get so ugly?",
  "icons": {
    "48": "icons/little-t.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "css": [
        "ugly_twitch.css"
      ]
    }
  ]
}