Mouse cursor themes in gnome cannot be changed

Desktop Environments Gnome
9

Yes, dconf-editor usually fixes any GTK issue.

You could also try this closely-related thread: Firefox does not follow cursor theme in Wayland+KDE Plasma - #2 by r0ckhopper

It’s for KDE, but it is a GTK-related setting that fixes the issue for the user on the Arch Forum.

…make sure that you have the following in ~/.config/gtk-3.0/settings.ini in the [Settings] section:

gtk-cursor-theme-name=default

Adding this line resolved the problem for me - and I’m also using KDE Plasma, so hopefully it’ll resolve the issue for you too!