Examine source code of Omnibang

{
  "name": "Omnibang",
  "description": "Search many websites right from browser's address bar using bangs provided by DuckDuckGo. A bang or bang-code is a shortcode for a website.\n\nType (don't paste) the general format \"! bang-code search-term\" and press Enter.\n\nFor example, \"! a men shoes\" will search for \"men shoes\" on amazon.com, whose bang-code is \"a\".\n\nClick the Omnibang icon next to address bar for more info.",
  "version": "1.0.1resigned1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "omnibox": {
    "keyword": "!"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Search many websites right from browser's address bar! Click icon for more info.",
    "default_icon": {
      "16": "img/omnibang-16.png",
      "32": "img/omnibang-32.png"
    }
  },
  "icons": {
    "16": "img/omnibang-16.png",
    "32": "img/omnibang-32.png",
    "48": "img/omnibang-48.png",
    "128": "img/omnibang-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{725c2806-d15b-491a-9dde-b6f29a3c8a61}"
    }
  }
}