Images can be extracted and batch downloaded from most websites. Especially for websites the right click fails or image can not save. Extra features: zip download / auto-enlarge image. See the script description at info page (suitable for chrome/firefox+tampermonkey)
https://cxc.today/zh/
Images cannot be downloaded on this website
Sample link: https://cxc.today/zh/store/gaeaoriginal/book/18553