nothing?,- it basicly uses the dangerous IE framework (spyware, activeX,toolbars?,..) alternatively and primery the Firefox one. It´s basicly a Firefox branch with the IE- tab function.

THough they recently (a few weeks ago) announced that they would start completely over again based on the Firefox source code but this time different as the current one. So no one knows if they will again emebd IE funtionality or just strictly Firefox mode enhaced with full of their services & advertisements.