Examine source code of Remove Analytics Count

{
  "manifest_version": 2,
  "name": "Remove Analytics Count",
  "version": "1.2",
  "description": "Removes the analytics indicator off twitter",
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "noviewer.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a49b76f7-204a-44de-a586-2fbd7b56bca1}"
    }
  }
}