When you download a picture from a web browser by pressing and holding then clicking download what folder does it get downloaded into? When you download a picture from a web browser by pressing and holding on the image then clicking download in the menu that pops up in which folder are you able to see it?

Is it the same on each browser (Safari, Chrome, etc), or does it differ?

EDIT: Referring to iOS
The saved photos will show up in the Photos app on your device.