Examine source code of Github Crawler

{
  "name": "Github Crawler",
  "description": "This browser extension retrieve information from GitHub repositories by crawling current GitHub repository and other related GitHub Repositories.",
  "version": "0.1.1",
  "manifest_version": 2,
  "icons": {
    "48": "icons/crawler-48.png",
    "225": "icons/crawler-225.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*/network/members"
      ],
      "js": [
        "forks-crawler.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d430f839-e287-4b0a-873d-d23cd8b525db}"
    }
  }
}