1. A system, the system comprising: a processor; system memory; and one or more computer storage devices having stored thereon a computer-executable instructions representing a security system for a browser-based environment, the security system including a first browser application configured to: host one or more other applications; load the one or more other applications on one or more separate domains other than a host domain; and use one or more cookies as a two-way communication method between the first browser application and the one or more other applications.