Blank Windows 10 download pages?

Is there a way to have Firefox automatically close blank pages/tabs when opened? On some sites when you download a file, it pops open a new blank page tab. Then I have to manually close the tab which is annoying. You used to be able to do this...

Cannot access any settings all windows that open are blank screen shot attached

Hello

I have a client using a Samsung ML-1865W series laser printer connected via USB to his Windows 7 machine. The printer is shared and a Windows 10 based PC prints via the share to the printer. Problem is that when printing from the Windows 10 machine...