Looks like there is something happening in line 454 of /home/ninjacow/mozilla-firebird/run-mozilla.sh (but you knew that already
). It's a shell script, which means it's plain text that you can open up in a text editor. Try opening it up and seeing what's at like 454. Easiest way to do that is:
(once you are in vi)
Post the contents of that line and the stuff around it. Methinks there's some program being run on that line that's causing a segfault.
p.s. - why is root trying to run ninjacow's copy of Firebird anyway?