You'll also need the MOZILLACONTROLLib.dll and the AxMOZILLACONTROLLib.dll found in the zip attached to this post:
https://forum.team-mediaportal.com/showpost.php?p=111705
Also follow the instructions to install the Mozilla ActiveX Control version 1.7.12 if you have not already done so.
Regards
DalaNorth
13/02/2007 [09:59h] DalaNorth added: Removed web browser keyboard. Latest version of webbrowser plugin must be used from now on.