Examine source code of New Tab Pointer

{
  "manifest_version": 2,
  "name": "ntp",
  "description": "New Tab Pointer",
  "version": "1.0.4",
  "icons": {
    "64": "icons/icon.png"
  },
  "background": {
    "scripts": [
      "background_script.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ]
}