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.

 
								



 
