First try a better browser. When the first ICS update came out, I was disappointed that the user agent string was no longer available in Settings. I downloaded Dolphin HD and the stock browser now gets about as much use as my iPad 2.
I haven't had any reboots under .14 but the browser still freezes once in a while. Hopefully .15 fixes that as well. At least, ASUS is making firmware updates unlike when I had bought my ASUS A730 pocket pc.