Firefox can be locked down similar to Internet Explorer, and this guide will give you the relevant information that is needed to create a secure, locked-down configuration, to restrict knowledgeable users actions into manipulating Firefox for their own needs.
With Firefox’s popularity rising on a day-by-day basis, many corporate environments are starting to employ the power of Firefox as their default browser. This document explains how, with insufficient restrictions or lock-downs Firefox becomes a powerful client controlled web browser that a sophisticated user can manipulate for their own benefits.