SaveImages was the program I relied on. Delayed upgrades to mozilla firfox quantum for quite some time. However, when I upgraded I lost SaveImages!
Then I loaded Simage as its replacement, and was very disappointed. This add-on doesn't work;
When I employ the “Opened image links in new tab(s)” feature a window opens, but there's no way to save the images selected. Period. Many other of the other options also don't work.
Disappointed.