Examine source code of Simple Facebook Style

{
  "manifest_version": 2,
  "name": "Simple Facebook Style",
  "version": "1.0",
  "author": "storkyle <https://github.com/storkyle>",
  "description": "",
  "icons": {
    "48": "icons/logo.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.facebook.com/*"
      ],
      "js": [
        "index.js"
      ],
      "css": [
        "fb-style.css"
      ]
    }
  ]
}