I’ve been using mozilla on my qnx6 xfree86 system for a while.
I put a test version here for you all to try out. At least you
will have a full blown web browser, email/new-reader, html-composer,
irc-client…
http://qnx.iaware.com/mozilla-xlib-1.0rc1-tar.gz
after you download it, you can
cd /
tar zxvf mozilla-xlib-1.0rc1-tar.gz
then type “mozilla” to enjoy.
This latest version of Mozilla 1.0rc1 was compiled on qnx6.2beta.
It may or may not work on a qnx6.1 system. If it fails on your
qnx6.1, just send comments to /dev/null 
Frank