These shortcuts are browser specific.If you are using Google Chrome then use these shortcuts:
Alt + M:To quickly composing message
Alt + ?: To search Facebook
Alt + 1: To open Facebook Home Page(news feed)
Alt + 2: Opens your Facebook profile
Alt + 3: To open friend request approval panel
Alt + 4: Opens the messages panel in Facebook.
Alt + 5: Shortcut to opens the Facebook notifications panel
Alt + 6: Brings you to your account settings page
Alt + 7: Brings the ‘Privacy’ page
Alt + 8: Opens Facebook’s “Facebook page”.
Alt + 9: It Opens the “terms and condition” page.
Alt + 0: Brings you to the “Help” Page.
Firefox users need to use Shift+Alt+# replace # with 1,2,3
Internet Explorer Alt+# and Enter
