I have this simple script: <a href="javascript:window.close();"></a>

It works in IE, but not in Firefox. Any clue as to why? Thanks.

Your error console should indicate the reason. With FireFox, you can't close windows that you didn't open. Some people have found workarounds, like changing the parent using window.open or window.opener=self, or using a 0 pixel frame, but most of these hacks no longer work. You'll get an error message like "Scripts may not close windows that were not opened by the script"

If your script is indeed the one both opening and closing the window, then I'd be curious to see what your JavaScript/error console is saying..

Do you want websites closing your windows for you? Firefox has the right idea here in limiting this amount of control.