Mine froze a few times too but I just kept at it. I made sure my homescreen was blank and deleted cache/cookies etc then restarted browser and went from there.
I want to start by thanking the devs. This RAWKS
I see there are a lot of people who are still having issues flashing the CWF firmware, they possibly made the same boneheaded error I did. When I was looking at the compatible Dumper/Writer I have a 2001A so I looked at the Writer I stopped...