Examine source code of MouseHide NBA

{
  "manifest_version": 2,
  "name": "MouseHide NBA",
  "version": "1.0",
  "description": "Hides mouse in full screen on NBA.com",
  "icons": {
    "48": "images/icon48.png",
    "96": "images/icon96.png",
    "128": "images/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.nba.com/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{60ca39e9-9c81-4dc4-8fcd-a4d370e1862e}"
    }
  }
}