Board Thread:Support Requests - Designing Your Wiki/@comment-44697621-20200825203624/@comment-168424-20200826005636

So I tested it wiki-wide on a UCP wiki and ImportJS seems to work.

@OTHERMIND: Just add the following line to your MediaWiki:ImportJS page... dev:DiscussionsActivity.js

UCP wikis have been reported to have slow cache updating, so it might not take effect right away, but should within a couple hours. That said, it seem to work quickly on my UCP wiki, but I had to disable it in my personal global.js, so it may have worked because of that.