Examine source code of Nicer Box Score

{
  "manifest_version": 2,
  "name": "Nicer Box Score",
  "version": "0.2.3",
  "description": "Makes NBA.com box scores pretty.",
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.nba.com/game/*/box-score*"
      ],
      "js": [
        "nba box score.js"
      ],
      "css": [
        "box score.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{51040224-8bd5-4e41-ad86-c5ecbd5e2099}"
    }
  }
}