The CEH handles program launch on Windows 8. It's a small win32 program that Explorer launches when the browser is invoked. If issues arise, there are some debugging features built into the program to help diagnose issues.
* Open regedit.exe and browser browse to HKEY_CURRENT_USER/Software/Mozilla/Firefox
* Add a new DWORD value names 'CEHDump', value 01
* Run a debug output viewer such as [http://technet.microsoft.com/en-us/sysinternals/bb896647.aspx DebugView].