i've noticed that whenever I try to leave it open while browsing elsewhere (Yahoo stat-tracker, here, etc) it always crashes Firefox. If I close it and keep everything else open it's fine. it's pissing me off.
I notice the same as well. Last yr, I ran nfl.com on firefox with no issues. This year nfl.com seems to crash Firefox. I usually have multiple tabs on the browser (footballguys, PFT, rotoworld, and fanball league, fanball live tracker). When I open nfl.com firefox crashes. So currently I run nfl.com on IE. I went to my cousin's house yesterday and the same exact thing happened on his PC(he's got espn live tracker, yahoo live tracker, etc running) When we opened a seperate tab for nfl.com, firefox crashed.