Even when I remember specifically where each submenu lives within the Salesforce setup, searching for me is more intuitive and faster, which is why I was super excited to read this post from Jeff Grosse (@CRMFYI). This Greasemonkey script adds a search menu to the Salesforce setup window and filters the setup menu on the fly:
What you need:
FF 3.5+
Setup Enhancer Greasmonkey Script
Notes:
Make sure that Greasemonkey is installed and you’ve restarted Firefox before attempting to install the Setup Enhancer script.
You can post enhancement requests to the discussion board of the script.

FYI – this script works in Chrome out of the box now. Just click install from the Setup Enhancer script page.
cool