Firefox? KDE4? BSD? VirtualBox

[hoodwink]

After reading the simple frocedures for installing PCBSD, I decided to give it a try. Since I don't have spare hardware or a non-extended partition free, I decided to put up virtualbox and give that a try. I downloaded the network install iso and installed in in a VB machine without burning the iso. No real problems, but it was slow (over 1 hour to install) since I don't have virtual assist hardware.

I'm running PCBSD in a 384M VB machine. Everything works well, if a little bit slow, unless I let the VB machine sit idle for an hour or so. When I do that Firefox becomes unresponsive, but I'm still able to switch kde desktops and do other work. Killing the firefox task takes a long time, and then Firefox refuses to start again (crash report - extremely slow - no meaningful information).

Since I'm new to PCBSD and VB, I'm not sure how to debug this.

Do you think I should increase the virtual memory setting?