In the current gallery system, GIF thumbnails always animate, a la tumblr dashboards. This slows down the rendering of more images, and on my old, rickety previous computer, would sometimes freeze the whole browser. It would be very helpful if there was an option not to play GIFs until you click on them the way 4chan and danbooru do. Browser add-ons do work, but native options are always nice.
Also, wouldn't it be easier on the server itself if all the thumbnails were just converted into JPEGs before being dished out in the galleries?