For reference on facebook site: https://www.facebook.com/help/167970719931213
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.