Examine source code of Wikipedia Shortcut

{
  "manifest_version": 2,
  "name": "wikipedia quick search",
  "version": "1.3",
  "description": "Search directly wikipedia from the address bar",
  "icons": {
    "48": "icons/48px-wikipedia_quick_search.png",
    "96": "icons/96px-wikipedia_quick_search.png"
  },
  "omnibox": {
    "keyword": "wik"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f7f7638a-dfb0-4b35-9f52-fc4fdb867964}"
    }
  },
  "background": {
    "scripts": [
      "wikipedia_quick_search.js"
    ]
  }
}