Lately I was surfing facebook.com and found that facebook has some default keyboard shortcuts which work cross browser. Thus, I am sharing few of the shortcuts which I found.

• Alt+1: This key combination takes you to your Facebook home page, No matter where you are in facebook.com
• Alt+2: This combination takes you to your profile, Again from anywhere in the facebook.com
• Alt+3: This combination opens up the pending friend requests dialog.
• Alt+4: By pressing this one you can see your Inbox(i.e. Messages).
• Alt+5: You can see your Notifications by pressing this combo.
• Alt+6: Pressing this takes you to the “My Account” where you can change your name and other details.
• Alt+7: Pressing this takes you to the “Privacy Settings” where you can update/change your privacy settings.
• Alt+8: This one takes you to the facebook fan page.
• Alt+9: Takes you to the Terms and Conditions page(Statement of Rights and Responsibilities) which is bigger than a constitution of a country.
• Alt+0: Takes you to the “Help Center” page. Where you can browse your applications and see facebook features.
• E: takes you to events
• F: takes you to friends
• N: takes you to notifications
• R: takes you to confirm requests

Also, Facebook added a new emoticon this must be in context to the number 42. Read its wiki for details and significance. You can get this in chat by typing :42:

UPDATE: Few more(Thanks to tudy).