Wow! This addon is Great!
After testing it with this website (https://vizus-property.com/property/malibu-residence-modern-2-bedroom-apartment-in-potamos-germasogeia), It has accomplished it purpose successfully.
I just put the Level to "0", and changed the parameters for the Maximum & minimum "dimension sizes", and It has downloaded only the Largest images, as it should suppose to do.
Some other similar addons I tried, didn't work as well as this addon.
Ok, there were only two images that were escaped from the sizes restrictions, were small in size, But I can understand. No software or application can be perfect :-)
I liked that it has downloaded all the photos in a zip file rather than each image separated. And the Best feature here is: When I pressed the "Save" button, all selected images can be saved to any chosen folder, and not only to the default Browser's download Folder.
Excellent extension! Bravo!! 👍