Sidebar Avatars - Replaces usernames on the list of online users with their avatars
This add-on replaces the usernames in the sidebar online users list with avatars, as below:
View attachment 74398
Tooltips on hover show you the usernames of the users. Invisible users (if you have permission to view them) have reduced opacity.
These changes will only work with a stock sidebar, i.e. they will not work with Widget Framework and others.
However, you may wish to edit the relevant WF template to achieve this.