At this time IBM have provided thi SPR#JALAA7VSRE APAR LO88282 about this issue without workaround .
This issue isn't affecting any other browser or later FF version so you can downgrade to FF44 or better , start using the ESR branch 38.7.
Update: ibm has published this technote with a workaround
Update: Since IBM iNotes is broken due to this change, the jar protocol support will be temporarily restored with Firefox 45.0.1. On Firefox Nightly and Developer Edition, the network.jar.block-remote-files preference will remain true.ReplyDelete