I found this little gem while surfing for some new CSS information. Did you know that if you press Control + Alt + F (Mac: Apple + Alt + F), a more advanced CSS viewer will show up as a pop-up in Firefox’s Web Developer Extension from Chris Pederick? I still love it and will always use Xyle Scope for most of my CSS information digging, but this is a major tool for finding elements quickly.
Kudos to Content with Style for the tip!