I recently blogged about the support problems I've had with TopStyle's Mozilla integration, so I'm very happy to see that Adam Locke has addressed these problems by providing a separate installer for the Mozilla ActiveX Control.
This installer takes care of registering the Mozilla ActiveX Control, which should resolve many of the problems my customers have reported regarding using Mozilla inside TopStyle. If you're using TopStyle and have trouble using Mozilla inside it, I strongly recommend trying this installer. To avoid overloading Adam's server, I've uploaded it to the following location on my site:
Note that this is a stand-alone install based on Mozilla 1.5, and it's separate from any existing copy of Mozilla/Firebird.