Facebook Shortcuts Keys For Firefox:

Shift+Alt+1: View your News Feed
Shift+Alt+2: View your own Profile
Shift+Alt+3: View pop-up of friend requests
Shift+Alt+4: View pop-up of messages
Shift+Alt+5: View pop-up of notifications
Shift+Alt+6: View Account Settings
Shift+Alt+7: View Privacy Settings
Shift+Alt+8: View Facebook’s own profile
Shift+Alt+9: Read latest Terms of Service agreement.
Shift+Alt+0: Open Facebook Help Center
Shift+Alt+?: Search
Shift+Alt+m: Compose a new message