Steps to reproduce:
- In Firefox, go to the admin panel and middle-click on “Users”
I get a page saying “The requested page does not exist, or it is private” (roughly translated from German). The URL of that page is https://DOMAIN/admin/users/list.
It should open the same page as it does when I left-click. The URL of this page is https://DOMAIN/admin/users/list/active.