Replace author avatars with the first image in a discussion's starting post. By itself, the extension just replaces the avatar with the discussion image - however, with CSS magic, this can become very powerful 🙂.
Images are loaded when the discussion item comes into view, and a spinner is shown until it has completed loading.
Use Bazaar or install manually with composer:
composer require fof/discussion-thumbnail
composer update fof/discussion-thumbnail
An extension by FriendsOfFlarum.