Examine source code of GitHub Active Forks

{
  "manifest_version": 2,
  "name": "GitHub Active Forks",
  "version": "1.0",
  "description": "Displays active forks for a given repository on GitHub",
  "author": "AB2",
  "homepage_url": "https://github.com/ab2pentest",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.ico",
    "default_title": "Check for active forks"
  },
  "icons": {
    "16": "icon.ico",
    "64": "icon.ico",
    "128": "icon.ico"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{84fc7c38-b626-4a20-ab29-a751c55a88fe}"
    }
  }
}