Heyas folks --

If anybody has been annoyed like I have been about Firefox crashing 
frequently with many tabs/windows open, I've found a workaround after 
digging through a 70MB ktrace.

Basically, firefox runs out of file descriptors and freaks out. Maybe 
it's a side effect of having lots of fonts installing from pkgsrc, I'm 
not sure. In any case, bumping openfiles before launching firefox has 
made the problem disappear for me.

ksh:
  $ ulimit -n 512
  $ firefox

or login.conf:

  default:\
	:openfiles-cur=512:

Has made things work much smoother for me.

Hope this helps,
Jared