iBrowse can be found here:
http://www.ibrowse-dev.net/download.phpThe craches occur in AWeb version 3.5+ where I assume it requires an FPU.
If you check it under WinUAE without FPU it will crash as well. If you enable FPU it will run just fine.
Datatypes (at least in my case) had nothing to do with. I even installed my licenced WarpDT datatypes with no better result.
One option is to stick with AWeb 3.4 that is included as well in ClassicWB packages.