Mozilla Firebird
 

firebird just crashed on me(i'm not lying!) and since you run it with a shell script i was wondering how to terminate it?
cuz it's just sitting there in my panel and i can't use it...
it seems to crash when i try to submit a form.

Open a console, find the pid (ps -aux) of the program and kill it (kill -9 pid)

Do you have xkill installed? Try that and see if that will kill it.

You could try killall mozilla or firebird as well.