Using Firefox 40.0.3.
Choosing right-click "save image as" always results in the image name being "4chan-arch-find-image". Using ctrl+S sometimes results in having the correct file-name, other times I have to try multiple times before it's the correct one.
Actually just noticed that opening an image redirects me to the image located on the fireden.net
archive, so I guess it's a problem on their side?