If they are, they're designing for poorly implemented HTML standards.Are there still some folks designing for only IE?
You may run across a site now and then which will not work right with Firefox or Safari but this is rare...especially with big important sites like eBay, Amazon, Yahoo, OurDJChat.
I just had another crash a few minutes ago, and it required a reboot, as it left a process running. My debugger was showing what looked like a conflict between my NVIDIA driver (dual displays), and FF.
Best I can tell, it only happens when a page I have opened in a tab, has Flash running on it...
I'll pop it up on their support forums.
Maybe it's you're fault for thinking you're a big shot with dual 22" displays?