I use several different search engines. The default engine in the browser is Ecosia (I've added it, otherwise I don't think Mozilla knows about its existence) bc it returns the most results when searching for images. When I'm searching for new images of the most beautiful woman in the galaxy, only Ecosia displays the most images. On the Duck and on Google half of the images are either missing, or (in the Duck's case) it simply shows two rows of images and that's it. Plus, Ecosia's setting to display large images actually does exactly that, whereas if you select "Large" images on the Duck, it keeps showing image sizes 600x800 among the results.