You are wrong, this is not correct - it does not do everything IE does with regards to ActiveX !!

Since ActiveX applies only to the Windows platform, it is unsuitable for Firefox which is available across multiple platforms. Currently, there is no mechanism by which you can use ActiveX controls in Firefox 2.0 or later.

Until recently, a third-party plugin provided ActiveX functionality for Firefox. The Mozilla ActiveX Plug-in provided partial ActiveX support for Firefox 1.5 and earlier versions. By default, these ActiveX plugins were configured to execute only the two Windows Media Player ActiveX controls, which enabled the playback of video content through the Windows controls. There is a configuration file that can be used to enable other ActiveX controls. For details, see Adam Lock's site.
The plugins for Netscape, Mozilla Suite, and Mozilla Firefox were created by Adam Lock and are maintained on his site, which has not been updates since 2005. These plugins do not work with Firefox 2.0 or later.

http://www.iol.ie/~locka/mozilla/mozilla.htm

Also being closed source its very unlikely that ActiveX functionality will ever become available on the Linux distro being run on the eeec pc being used in this instance