A couple of days ago I wrote about the problems I've had with Firefox 2.0 being terribly unstable. The fifteen restarts a day it needed to keep it going were enough to drive one batty. In my case the problem has largely been solved by uninstalling the Google Toolbar seems to have solved the problem most of the time. I still hold my breath when the spinning wheel of colored death appears from time to time but it usually goes away quickly. With the Google Toolbar it went away never.