[idoubtit]

It's easy to fix with the right browser. For instance with the Chromium-based Vivaldi, I configured "Image Animation" to "Once", with the other possible values being "Loop" and "Never". You may define a shortcut key to change this setting on the fly.

[chrismorgan]

That doesn’t fix undesired animated image autoplay, it breaks animated images completely, since you can’t trigger playback on demand like you can with videos.