Examine source code of Find IP Fast

{
  "manifest_version": 2,
  "name": "IP Address",
  "version": "1.0",
  "description": "Find your IP Address with a Single Click!",
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon_32.png",
    "default_title": "IP Address"
  },
  "homepage_url": "http://find.youripfast.com/?s=ext_page_link",
  "web_accessible_resources": [
    "icon_19.png"
  ]
}