All you have do is press the letter J (as in Juliet) to scroll down to the next post in your Newsfeed.
Pressing the J key on your keyboard will instantly display the next post in its entirety (if it will fit on the screen) without having to move your mouse up and down to center the post.
And there’s another advantage to using the J key instead of the mouse: It places a bold blue border around the entire post, including all the follow-up comments on that post.
Having a border surrounding the entire post and everything associated with it virtually eliminates the chance that you’ll end up commenting on the wrong post by accident.
To give it a try, simply head over to your Facebook Newsfeed and start pressing the J key. You just might be pleasantly surprised.
And now for one last tip: You can use your keyboard to scroll up as well. Just press the K (as in Kilo) key!