[Koha] Firefox pop up persistance

[Justin Martin]

I did a system upgrade on friday before the end of the day. When I  
came into work on saturday and turned on our server (we shut it down  
at night for the time being), whenever I pull up a patron in the  
system, the "leave a message" box pops up and cannot be saved or  
cancelled in firefox.

I can use koha in chrome with no issues but in firefox it happens  
every time with every patron.

Ubuntu 14.04.5 LTS
Koha 17.05.01.000

Not a real issue with our operations but still an issue.

Justin Martin
Library Assistant
Abel J. Morneault Memorial Library