Examine source code of Bushtabs

{
  "manifest_version": 2,
  "name": "Bushtabs",
  "version": "1.1",
  "description": "Bushtabs",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mozilla.org/*"
      ],
      "js": [
        "getDateTime.js"
      ]
    }
  ]
}