Examine source code of Nice Twitter

{
  "manifest_version": 2,
  "name": "Nice Twitter",
  "version": "1.0",
  "description": "An extension to hide the number of likes, retweets, etc on twitter",
  "icons": {
    "48": "images/nice-twitter-logo-48.png",
    "96": "images/nice-twitter-logo-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/home*"
      ],
      "js": [
        "nice-twitter.js"
      ]
    }
  ]
}