Fairly simple manual way to grab the higher quality images (I can download at roughly the same pace as taking screenshots). Inspect the website source code (ctrl + shift + c), select the image (click on it), click the three dots on the piece of the source code html that is highlighted to expand it, click on the url and copy it, paste in a new tab, right click the image and save as. This works on both chrome and firefox, probably others.
I'm sure there are extensions that do this faster, this site has megathreads on methods, but this has always worked for me for years.