Before using Facebook keyboard shortcuts, determine the Key for your computer, which is based on what browser and operating system you are using.
|Win & Chrome||Win & Firefox||Win & IE||OSX & Firefox||OSX & Other|
|Alt||Alt + Shift||Alt||Function + Ctrl||Option + Ctrl|
Once you have determined that on what browser and operating system you are now use following keys with above mentioned buttons. For example, if you were using Firefox in Windows and wanted to go to the Facebook Home you could press Alt + Shift + 1.
Tip: If you are using Internet Explorer, after pressing Alt + # let go of both keys and press Enter for the shortcut to work. For example, press Alt + 1 (let go) and then press Enter to open the Facebook home page. * Also, the M to open a new message in Internet Explorer does not work, since it is the home shortcut.
|M||Open a new message *|
|?||Go to the Facebook Search|
|1||Home (News Feed)|
|2||Your profile page|
|6||Your Account Settings|
|7||Your Privacy Settings|
|8||Go to the Facebook page|
|9||View Facebook Statements and Rights agreement|
|0||Open Facebook help center|
Notice: The above shortcut keys only work with the numbers on the top of your keyboard, not the number pad.
Source : http://www.computerhope.com/tips/tip156.htm