Firefox doesn't use ActiveX.

https://support.mozilla.com/en-US/kb/ActiveX

Your plugins list includes "IE Tab 2". If you are running the page in IE Tab, then in theory ActiveX could run, but IE Tab is subject to the security restrictions established in IE Internet Options. This includes your "zone" settings for what types of ActiveX controls are permitted to run, and "kill bits" stored in the registry so that web sites cannot use unsafe ActiveX controls. To debug ActiveX issues in detail, you probably should load the page directly in IE where it will be easier to adjust the settings.