Today onwards Facebook have recently announced the latest features and updates which includes access to high-resolution, printable quality pictures with out activating any premium/paid accounts. Now you can upload photos up to 2048 pixels also called 720p high definition photos and even can download these high-resolution pictures using the Download button.
You will now be able to “view photos and even whole albums without even having to go to a new page. Instead, the photo opens in the center of your screen, and you close it when you’re done. There’s no need to go back and forth between pages or reload the page”
via Facebook Blog