REGEDIT4 

[HKEY_CLASSES_ROOT\http\shell] 
@="open" 

[HKEY_CLASSES_ROOT\http\shell\open] 

[HKEY_CLASSES_ROOT\http\shell\open\command] 
@="C:\\PROGRA~1\\MOZILL~1\\FIREFOX.EXE -url \"%1\"" 

[HKEY_CLASSES_ROOT\http\shell\open\ddeexec] 
@="\"%1\",,0,0,,,," 

[HKEY_CLASSES_ROOT\http\shell\open\ddeexec\Application] 
@="Firefox" 

[HKEY_CLASSES_ROOT\http\shell\open\ddeexec\Topic] 
@="WWW_OpenURL"