When I try in Firefox I get the following
A left click on the link itself results in a dialog from Firefox that says
You have chosen to open:
Old Ladies, The.epub
which is a: EPUB file (542kb)
What should Firefox do with this file?
O Open with Adobe Digital Editions (default)
O Save File
O Do this automatically for files like this from now on
A right click on the other hand gives me a box to select
Open Link in new Tab
Open Link in new Window
Bookmark This Link
Save Link As...
Copy Link Location
Selecting Save Link As
then saves the file.