one of the worst things in firefox is when you click a link in a chat window or document it opens it onto an already open browser causing you to lose information ... i was attaching a HUGE file anc clicked a linked and i had to restart ...
Never had this problem.
It usually opens in the same window, unless you specify "open in a new windows" or "open in a new tab" in both cases it does not ovewrite anything, but opens in a blank window/tab.
Maybe it's a bug in your version and you should update?
