I'm using Build 7.0.15055 (Revision 740667; March 5, 2012) on Mac OS 10.7.4. The following call points at Firefox within Parallels even if that preference is turned off in Safari (instead of the Mac Firefox app): OSStatus err = ::ICGetPref(instance_, query, &atts, &appSpec, &appSpecSize); with "kICHelper•http" Please notify the Parallels team if you know how. Thank you.