No offense and no hard feelings but havent you been talking about the exact same thing for the past...year now?
I mean, I could swear you were talking that you need to build a ROP chain last christmas.
Again, I dont want to offend, just wondering how come this process took so much of your time.
From summer 2014 to March this year, we devoted most of our time to the kernel exploit. There only became a need for a new browser exploit in August last year, and we were looking into viable bugs at the time, soon getting the one we use now. After we finished the kernel exploit, we began looking at WebKit again.