Hi all, the items in Firefox/Services menu disappeared after I restart my iMac, but not in every browser tab. For example, they are there and working correctly if the browser display the Help/Troubleshooting page (I'm not sure the name is the correct one, I have a localized version in Italian: "Aiuto/Risoluzione dei problemi"). If I actuate Firefox restore function, Services work properly until I restart the iMac. I tried to run Firefox with the option "-NSDebugServices com.apple.mail" getting the following messages: Mail/New Email With Selection (com.apple.mail) is enabled in the services menu and disabled in the context menu, by the standard Services policy. Mail/New Email To Address (com.apple.mail) is enabled in the services menu and disabled in the context menu, by the standard Services policy. Mail/New Email To Address (com.apple.mail) is disqualified because its send and/or return types cannot be handled by the requestor ChildView 0x11b6e4680, gecko child 0x11ba56800, frame {{0, 0}, {1580, 1040}}. Mail/New Email With Selection (com.apple.mail) is disqualified because its send and/or return types cannot be handled by the requestor ChildView 0x11b6e4680, gecko child 0x11ba56800, frame {{0, 0}, {1580, 1040}}. GVA info: Successfully connected to the Intel plugin, offline Gen9 WebGL(0x12dc38000)::ForceLoseContext" Please, do you have any idea how to fix my installation? iMac Retina 5K Late 2015 - OS X 10.11.6 - Firefox 50.0.2