Facebook appears to be testing a new way to alert users that they have a notification, giving them more information. Some users are seeing a box right below the notification alert, showing who performed the action.
Facebook still has the more detailed notification in the bottom left portion of the screen, telling users exactly what happened, such as a response to a comment or a timeline post.
With this notification box, users can see which friends have engaged with their posts or timeline. This pops up if the user does not immediately check their notifications, prompting them to click on the icon.
Readers: Have you seen this?