Examine source code of MLB TV Improved UI

{
  "manifest_version": 2,
  "name": "MLB TV Improved UI",
  "version": "1.0",
  "description": "Improves the UI of the MLB TV web player",
  "icons": {
    "48": "icons/mlbtv-uim-48.png",
    "96": "icons/mlbtv-uim-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mlb.com/tv*"
      ],
      "js": [
        "mlb-tv-improved-ui.js"
      ]
    }
  ]
}