Tabs do not close on TorBundle

Hi, i just installed the TorBundle with Firefox ESR 10.0.9 on Win7 32bit. Everything works fine, a little bit slow, but that´s not the point. What annoys me is the fact that I can´t clsoe any open tabs. Neither by clicking on the X, nor by right clicking and selecting "close tab".

Is this a know bug or a feature? Is there any work-around solution available?

Trac:
Username: wedding13347