Examine source code of Mako Player

{
  "manifest_version": 2,
  "name": "Mako Player",
  "version": "1.1",
  "description": "removes cursor from player after 1s of inactivity",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mako.co.il/*"
      ],
      "js": [
        "index.js"
      ]
    }
  ]
}