Running it as a different user should suffice. Anyway, the problem alluded to is probably X11. Any GUI application will be able to do things like sniffing your

Running it as a different user should suffice. Anyway, the problem alluded to is probably X11. Any GUI application will be able to do things like sniffing your keyboard and clipboard data. It's hard to do right (but of course isn't reason to not run untrusted applications with low privileges) and one of the things Wayland set out to improve.