FWIW, I guess KDE is more than a bit resource-happy too; does the
problem persist when using a simple window manager (fvwm, for instance)?
I use Firefox under fluxbox under 3.9 with great succes. Cannot remember
it crashing. Konqueror runs fine aswell, though I use it much less.
Actually, firefox works with fluxbox without any problems. Before I
tested fluxbox I tried the "ulimit -d unlimited" so I don't know if that
has anything to do with it to. It seems like firefox became a bit faster
on KDE, but it still crashes.
Thanks for the different inputs!