I opened the nemo-desktop file, /usr/bin/nemo-desktop with ghex (gnome hex editor). Is this the right app?
That file is from the nemo package.
With search (CTRL+F) I found the warning that you get when you use root.
Can I see what is triggering that warning? So maybe I can remove it as for tor-browser.
Maybe there is something that checks what user is launching it.