Examine source code of hltv-not-wide

{
  "manifest_version": 2,
  "name": "hltv-not-wide",
  "version": "1.0.4resigned1",
  "description": "Front-end changes to hltv.org.. but doesn't make it any wider.",
  "options_ui": {
    "page": "options/options.html"
  },
  "applications": {
    "gecko": {
      "id": "hltv-not-wide@skend.com",
      "strict_min_version": "42.0"
    }
  },
  "permissions": [
    "storage",
    "https://*.hltv.org/",
    "cookies"
  ],
  "icons": {
    "128": "img/icon_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.hltv.org/*"
      ],
      "css": [
        "styles/default_style.css"
      ],
      "js": [
        "sanitizer.js",
        "jquery-3.2.1.min.js",
        "controller.js"
      ],
      "run_at": "document_end"
    }
  ]
}