Well someone will waste hours writing JS just to save a few second of your time?
Save images one by one, it takes 2 clicks and 1 enter.
(indeed i tried to did it, had frustation :)

simple bookmarklet
drag the code below to you bookmark bar, and click on it on the website you want to download images
javascript: (function(){ function download(file,name){ const a=document.createElement('a'); a.href=file; a.download=name; a.target='_blank'; document.body.appendChild(a); a.click(); a.remove(); } const imgs=Array.from(document.querySelectorAll('img[alt]')); imgs.forEach(el=>download(el.src,el.alt)); })()