Examine source code of Zuckerbox

{
  "manifest_version": 2,
  "name": "Zuckerbox",
  "version": "1.5resigned1",
  "description": "A Facebook cleaner with simplicity at its core",
  "icons": {
    "48": "icons/nowords.png"
  },
  "permissions": [
    "webNavigation",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.facebook.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "maikelify.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/nowords.png"
    },
    "default_title": "Zuckerbox"
  },
  "web_accessible_resources": [
    "images/zucky.jpg"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "maikel@maikel.uk"
    }
  }
}