facebook graph api - Adding custom links like 'Like' / 'Share' / 'Comment' in newsfeed -

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i want know if possible add custom button 'like'/'share'/'comment' in facebook's newsfeed.

i wanna add action 'mark unread' posts appearing on user's newsfeed, user can check them out later.

i found browser add-on : http://socialfixer.com enables functions on user's newsfeed. wondering if achieved through facebook app, without of browser add-on.

thanks :)


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