If Netscape crashes your system or you see a lott of "broken" images: 

install the TCP/IP DOS box fix from: 

ftp://service.boulder.ibm.com/ps/products/tcpip/fixes/v2.0os2/pn82849 

APAR PN82849    
This APAR is a fix in the DOS BOX kit to allow users to run Netscape under Win/OS2, and 
Lotus Notes without hanging.  In order to install this fix, change to the tcpip\bin directory   
and copy the 3 files  (VDOSTCP.VDD, VDOSCTL.EXE and VDEBUG.EXE).  Install WINSOCK.DLL
in the TCPIP\DOS\BIN directory and reboot the system.  This APAR is for TCP/IP 2.0.

This patch is also available for Warp Connect (Server) by using the "Retrieve Software Updates" icon.

update the following setting in netscape.ini: 

[Network]
Use Async DNS=no

WARNING: Don't install fixes for problems you don't have!