Board Thread:Support Requests - Getting Technical/@comment-3012625-20171028233554/@comment-5454372-20171029004156

I doubt Wikia will approve of this suggestion site-wide (and it's not the most aesthetically pleasing), but if your user needs to hide the animations immediately, they can put the following code in their personal CSS page at Special:MyPage/common.css for that wiki specifically, or Special:MyPage/global.css on here at Community Central if they want it applied to all wikis they visit on the Wikia network.

This should make all images containing ".gif" in their filename completely transparent: img[src*=".gif"] { opacity:0; }

A couple of limitations:
 * This will hide any image with ".gif" anywhere in its filename, so something like  would get caught in the filter (this is partly to capture instances where there may be extra writing after the filename, like "picture.gif?id=1047[...]")
 * This can't distinguish between animated and non-animated gifs -- anything with ".gif" in its name will get hidden
 * This can't deal with animated images which either aren't gifs, or don't have ".gif" in their filenames (e.g. APNGs, animations which are created from a static image via CSS or JavaScript)

Someone might have a better JavaScript-based solution, I'm not familiar with how to use it -- this is more an emergency workaround if your user needs it ASAP.