Every now and then when I am bored I visit a little addon website for my browser of choice Firefox. It is a great site full of many useful and useless things https://addons.mozilla.org
I go there when I’m bored to see what new stuff people have been making see if there is any new ideas or new takes on old ideas. Sometimes i find things that are superb and install them immediately.
One such extension I came across the other day is Piclens.
It works with various websites like flickr and basically creates a full screen slideshow of the pictures the video explains better than I can.
Good news for non firefox users to chances are that there is a version available for you as versions are also available for Internet Explorer and Macs.