Load about:preferences#privacy in the Firefox address bar.

Legal Notices.Do the following to enable strict Tracking Protection:

NOTE: This setting applies only if you are using the Siebel application Print command with Microsoft Excel. In Security Settings, under ActiveX controls and plug-ins, navigate to Initialize and script ActiveX controls not marked as safe, and select Enable or Prompt.In Security Settings, under ActiveX controls and plug-ins, navigate to Script ActiveX Controls marked safe for scripting, and select Enable.In Security Settings, under ActiveX controls and plug-ins, navigate to Run ActiveX controls and plug-ins, and select Enable.In Security Settings, under ActiveX controls and plug-ins, navigate to Download signed ActiveX controls, and select Enable or Prompt.Select the Web content zone that you want to customize (for example, Local Intranet or Trusted Sites).From the Internet Explorer Tools menu, select Internet Options.

For more information, see ActiveX Requirements for Using High Interactivity. You cannot disable this health check, because a corresponding parameter is not available. If you enable the browser health check, then it verifies that you have enabled support for full functionality for the ActiveX controls and plug-ins.

To enable full functionality related to ActiveX controls and plug-ins for Siebel Business Applications using high interactivity, specify the following settings. Siebel System Administration Guide > Configuring the Browser for Siebel Web Clients > Requirements for Deploying Siebel Applications Using High Interactivity > Manually Enabling Settings for ActiveX Controls and Plug-ins Bookshelf v8.1/8.2: Manually Enabling Settings for ActiveX Controls and Plug-ins Bookshelf Home | Contents | Index | PDF

Fix activex on firefox