Firefox 3

A firefox question - sometimes when I try to open a new tab or window, every tab or window or tab I currently have open just closes suddenly.

As an example, if I go to this page -

http://arcade-sports-games.pogo.com/games/pga-tour-golf

and try to open the "play a a guest" option, every tab just closes suddenly. Whats the reason, and if necessary, what firefox settings do I need to change?

If you have an old version of flash it can be a bit spotty. Try to download the latest plug in from www.adobe.com or one of the open source alternatives.