Yep, I've got Firebug and use it almost every day both at work and at play. It and the other similar toolsets available in other browsers (or Firebug lite) are valuable tools to take advantage of; it's well worth the time spent to delve into the full feature set offered and how to make best of use it.
P.S. Wow, it's been a while since we've had such an
awesome troll around here.