Are you too annoyed too by the fact that double-clicking on a URL or HTML file on your hard disk will always start a new instance of NETSCAPE.EXE, although Netscape is already running? This is a waste of time, memory, and system resources.

The Netscape DDE Interface is the solution. You can associate it with HTML and URL files, so that when you double-click on them, either Netscape will be started or, if it's already running, the HTML file or URL will simply be passed to the running instance.