If your Firefox crashes when you try to access certain websites like uefa.com or gamespot.com (also michelin.com, linkedin.com, msgpluslive.net have been reported), see if you have the Firefox extension (aka add-on) called Extended Statusbar installed. If yes, disable it and try again.
Extended Statusbar is a neat little extension and is included on my list of favourite Firefox extensions. Unfortunately, with it crashing the browser I have been forced to disable it until the bug is fixed.
