11th March 2017, 4:19
I've noticed the same problem with trying to download ebooks. The Save Dialog comes up asking What Firefox should do with this file. I have 'Save File' selected, but the 'OK' button doesn't respond. That is - it doesn't highlight when I hover over it like 'Cancel' does - and when I click on 'OK', nothing even begins to download.
Open with 'whatever' still works.
Open with 'whatever' still works.