For reference on facebook site:

To be able to share your widgets with your facebook friends you will need to create a facebook group with the name "ContentGlass".

This tutorial will show you how to create this group step by step.

Step 1: connect with your facebook user to facebook site.

Step 2: In the main page click on the groups button in the left or right side of the screen (depending on your localization).

Step 3: Click on the "+Create Group" button.

Step 4: In the opened dialog, enter in the group name "ContentGlass" , Set the group privacy to the permission you like for the group (every permission is ok).

Step 5: Add to the group at least 1 friend (after that you can also add friend to the group later).

Step 6: Click the "create" button and start share widget with your facebook group friends.