Sharing large photo albums on Facebook can be frustrating. It's not easy to find the snapshots that really interest you when you’ve to browse page-by-page. To make navigating photo albums easier, Facebook now "automatically display additional photos as you scroll down a single page. You no longer need to click "Next" or try to guess page number when browsing photos," informs Facebook.
"Before this, photo albums would display 20 photos per page. Now you're enjoying more photos all in same page. And, to avoid slow down, Facebook populate more photos as you scroll down, same as News Feed displays more stories as you navigate down the page. The thumbnails displayed are also larger, so now you can see more before deciding whether to click to a full-sized image," explains Facebook.