Has anyone else noticed that Firefox changed the behavior of the option to warn when closing multiple tabs? This is one of the things that I liked so much better than Safari; FF2 would warn me if I tried to close a window that had multiple tabs OR if I tried to quit FF (command-Q). Now FF3 does the same thing in the first case, but it gladly quits without a warning. Is there any way to get back the old behavior? I hate accidentally shutting down the browser.