Photographers and artists rejoice—just like in the official iOS and Android apps, pictures are no longer cropped to 16:9 on the web version of Mastodon. Link previews have also gotten a face lift, and will now show both the article date and author when available.
@Gargron please address the issue with the GIFs, as they currently display as videos, and the player used for videos is outdated by today's standards.