Alright, after 2 weeks of running this browser I wish I never installed it. It is horribly buggy in one area which is, uh, important.
It no longer will crash your entire system when it consumes too much memory. What it does instead is won't load your start page. You fire up the browser and it just hangs...loading...indefinitely. Or you could be in the middle of a session and open a new tab and it will do the same thing.
I don't really like Firefox primarily because I dread configuring things, and, well it looks like I have no choice. I've made it my default browser for the time being as IE8 RC1 is completely un-usable in the current state. Hopefully they will have this fixed before it becomes a stable release.