took smartcert.net practice exam for MCSE (70-290)

I ran into a link to smartcert.net today. My son is taking his nap thus I have half an hour to forty-five minutes to kill. So, I think, why not. I took the example exam for 70-290. the quiz session won't start within Firefox, just spinning forever. It took me a while to find IE, since I've deleted the shortcuts on the desktop and taskbar, since I rarely use it if not forced.
The test itself is pretty good, I'd say. Not sure whether they'd be this many ntbackup/vss question though. Questions are pretty long and the 2-minute clock is literally ticking in my face! got to read quick.