Board Thread:Support Requests - Designing Your Wiki/@comment-24045678-20161221010350/@comment-24055022-20161221021829

The falling snow is just a simple code in your JS. Just add dev:SnowStorm.js to your wiki's MediaWiki:ImportJS. If JavaScript is not enabled on your wiki, which you can check at MediaWiki:Wikia.js, you'll need to contact Staff to enable it for you at Special:Contact/general.