Very interesting and Promising Extension! It really downloads the Largest size of the images in the chosen Tab. BUT I gave only 3 stars because: For example in this web link: (https://xenofontos.com/portfolio-item/east-residence/) I tried to download the pictures from, (It has 22 photos), but the extension downloaded for me only (12 photos).
In the Preferences I have choose to download from the:
-> Active Tab
-> Image Filter: "All Images".

Fix this and I will change my rating to more Stars!!