Examine source code of Quick Clone

{
  "name": "Quick Clone",
  "version": "1.0.1",
  "description": "",
  "permissions": [],
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*/*"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "icons": {
    "16": "images/get_started16.png",
    "32": "images/get_started32.png",
    "48": "images/get_started48.png",
    "128": "images/get_started128.png"
  },
  "manifest_version": 2
}