Is there any way I can set dashboard Images as my desktop background?
Unfortunately there’s no way to do this at this time – although we are happy you enjoy the images! Note, however, that every image has the photographer’s credits linked at the bottom. So if you enjoy their content, you can go to their respective website and find the image you like (or others)!
are these picture offline or you get them with sending some request?
These images are packaged along with the browser application itself – there are no network requests needed/made to fetch the image data as it’s already pre-baked into the application.
Does this answer your question sufficiently?