Firefox on X-11 Segmentation fault (within interactive shell); Alternatively - what web browsers are easy to run on X11?

Firefox on X-11 Segmentation fault (within interactive shell);
Alternatively - what web browsers are easy to run on X11?

Something has gone awry with my firefox called from unix, and I get this:
/usr/lib64/firefox-3.6/run-mozilla.sh: line 131: 21933 Segmentation fault
"$prog" ${1+"$@"}
I have activated ish (interactive shell), and it worked fine earlier
today. I tried rebooting, and googeling, but couldn't see something
trivial.
Also - are there other web browsers I can use in the server environment,
apart from firefox?
Thanks! Alon