undefined

manifest.json

{
  "update_url": "http://clients2.google.com/service/update2/crx",
  "name": "Urban and Normal Dictionary",
  "version": "1.1",
  "manifest_version": 2,
  "description": "Dual Definitions for Urban Dictionary and Wordnik",
  "icons": {
    "16": "icons/icon_16.png",
    "48": "icons/icon_48.png",
    "128": "icons/icon_128.png"
  },
  "browser_action": {
    "default_icon": "icons/icon_16.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "http://api.wordnik.com/",
    "http://www.urbandictionary.com/"
  ]
}