Image Dimensions - Breaking the Layout
Since I noticed that some products have preview images in different sizes, I created an image that is very tall, and this confirmed my suspicion. When I upload a very tall image, it breaks the layout of the page. It might be a good idea to specify the height of a product image so that you don't “accidentally” destroy the layout. Image to Test: https://i.imgur.com/y3K1ka1.png
Image Filesize
I searched Google for large images in terms of file size and found something at NASA. I simply embedded the link as a product image and saved the product. Now, when you load the product overview page, the image is loaded, which in my example is around 80 megabytes. Here, you might want to limit the embedding of external images and/or check if there is a way to limit the file size that an image can have.
