"No Distractions" for Facebook is a Safari extension that makes the layout of Facebook less distracting:
On the home page, it removes the newsfeed, sidebar, recommended posts, explore, and stories. It also turns the background white.
This gives you a minimalistic Facebook experience, which makes it easier to control how you use the site:
Do that thing you intended to do, instead of getting distracted by, e.g., viral videos on the newsfeed!