Download pictures displayed in a search engine main page

Hi!

In Firefox, if you open a new tab, then the default search engine may display a picture with a search line in the center of your screen.

In my case, Yandex is the default search engine with the next picture on my screen

I assume this picture is stored somewhere locally on my PC. Where?

That page and the image are loaded by the Yandex add-on you have installed (or so it seems). You could use the Browser Console to see the network request log and see if you can determine the URL of the image.