1d2fafb8_hrome__Firefox__Safari_and_IE___Facebook_Actions
[Chrome] ALT + C [Mozilla Firefox] ALT + SHIFT + C [Internet Explorer] ALT + C, then ENTER [Safari and All (of Mac)] CTRL + ALT + C [Facebook Actions] 
Comment when on a story in news feed
16 Facebook Shortcuts for Chrome, Firefox, Safari and IE!
Facebook Actions