Answer by DKBHOI for How to redirect user from FB canvas app's feed Post to FB canvas app

You may try the bellow code. Some times sequence may be important and implementing function(response) method directly instead of implementing fbCallback works for me.

FB.ui(
      {
       method: 'feed',
       name: 'ManachiApp',
       caption: 'I just want to share',
      description: ('I just want to share on fb wall'),
      link: 'https://apps.facebook.com/manachi/',
      picture: 'http://manachi.herokuapp.com/images/logo_large.jpg'
      },
      function(response) {
        if (response && response.post_id) {
          alert('Post was published.');
        } else {
          alert('Post was not published.');
        }
      }
    );