WEBPlotter

The ActiveX version of WEBPlotter was developed as a replacement of the WEBPlotter plugin under Microsoft Internet Explorer (MSIE).

ActiveX is a Microsoft technology, whereas plugin is a Netscape technology. So it is clear that support of the plugin technology is not ideal under MSIE and even under the latest versions of MSIE (MSIE 5.5 SP2 and above) this support is abandoned.