Image directories in firebase

I am analyzing competition in Amazon niches and I have noticed that some of the websites have external links from the Firebase hosting with a subdomain. This website is a directory of many images and a title.

Both the images and the titles are linked to external websites (I suppose it will be scraped). What strikes me is that they are not only images from these websites but there are even from social networks like Instagram.

the web is very plain and simple in HTML.

Does anyone know how to create this type of website?

Thank you!