During the v56 lifecycle, Mozilla and PortableApps.com released several distinct builds. Your query most likely points to one of these two official releases:
To help point you in the right direction or look into specific fixes, tell me: robozou 2 version 56 english beta 5 portable
The V56 update serves as the underlying backbone for this package. It introduces critical enhancements over earlier builds: During the v56 lifecycle, Mozilla and PortableApps