Facebook offers a whole bunch of keyboard shortcuts for many common and even not-so-common actions. Socialbakers created an infographic to list these shortcuts for Chrome, Firefox, and Safari on OS X, and Chrome, Firefox, and IE on Windows.
Some of these shortcuts include: create a new message, get back to the main page (news feed), check your friend requests, visit your profile page, check account or privacy settings, and like a photo.

Two shortcuts Socialbakers didn’t list: J and K now work to move you forward and back through your news feed, but apparently not on profile pages.

via Forbes