Here’s a challenge, or you can call it an experiment. Limit yourself to visiting Facebook no more than one time per day. Don’t let that one time consume your entire day. Just a quick visit. It can be the same time each day, or not. Will you reclaim time? If so, how much? What will you do with your found time? Why not post a photo of your daily found-time activity during your Facebook visit? It could inspire others. Do this experiment for a week, a month, a year, or longer. Just give it enough time to see an actual result.
This is a screenshot from my first day of this experiment. A desktop free of Facebook distractions, and only what I am truly interested in doing.