Odd behaviour in Safari with firebug

[rich]

I did a reinstall of all of our computers recently (5) and did not install firebug on any of them. Now on Safari on two of them whenever we go to our homepage or to the firebug homepage (nowhere else that I know of) we get a firebug window in the bottom half of Safari that we cannot interact with. It does not happen on any other browsers (firefox, icab) and it does not happen on any other site that I know of nor does it happen on the other 3 computers. I didn't even think there was a plug-in for Safari, is there?

It sounds like some sort of hack to me. Anybody know anything about this?