
There are some keyboard shortcuts for Facebook for both Windows and Mac Operating System. First Check your modifier keys based on your Operating System and browser.
Modifier Keys :
Windows & Chrome – Alt
Windows & Firefox – Alt + Shift
Windows & Internet Explorer – Alt
OSX and Firefox – function + ctrl
OSX and Other – function + ctrl
Once you have determined your modifier keys see the Facebook shortcuts and press the Modifier Keys and Facebook Shortcut together.
Facebook Shortcuts :
For Example : If you are using Chrome in Windows and you want to open Facebook Notifications then press Alt+5. That’s it.