Thread:JosephHawk/@comment-25523075-20150322191852/@comment-5288784-20150324144155

Yes, you can only see this checkbox on Special:ListUsers on any English wiki. Putting this code in your personal global.js makes it activate on any wiki you visit, but it will only work for you alone. If you wanted to make it work for every user on one specific wiki, you should put the code into "MediaWiki:Common.js" on that wiki.

What makes it activate only on Special:ListUsers specifically is actually the starting part of the code itself:

Normally, all other user groups should have their own checkbox by default. If it is not the case, contact the Wikia staff and report the bug.

If you need a new user group on your wiki, contact the Wikia staff and tell them what their privileges should be, and they should create it.