Thread:Project:Support desk/Any way to control the caching of MediaWiki:Common.css?/reply

It's usually not necessary for visitors to clear their cache. ResourceLoader sends an Expires: header with a duration of 10 minutes, so the browser should request the URL again to the server, and it will check if the file has changed, and send the new version of it.

Basically, they'll be seeing the old version for 10 minutes at most, but that should be acceptable.