Try this and see if this will resolve issue.With Firefox close go to Web Security / Settings and Clear Virtual Data.Close ZoneAlarm GUI.Open Firefox and Site Check should be active (green).
Hope this helps.If it doesn't contact Support to address issue.
Footnote : I only turn Virtualization Off when installing and updating Firefox or IE and Add-ons and Plugins.Here it disables halo around browser when Off.
Everything active if enable except Virtualization when turn Off.
Helpful links :
Have a nice Day.