John wrote: > I have successfully downloaded and installed Jmol as an application. > Now, how do I install it as a plugin in Firefox and MSIE? Jmol does not install as a plugin. It is an applet that automatically is downloaded from the web server. No client installation is required. The file JmolApplet.jar is put on the web server. It is automatically downloaded to the client when the page is accessedd. I suggest that you look at http://www.jmol.org/demo http://www.jmol.org/jslibrary