My FF-related reason for using X11 that drag&drop from FF to Nemo doesn't work under sway but does work under i3. Trying several combinations of environment var

My FF-related reason for using X11 that drag&drop from FF to Nemo doesn't work under sway but does work under i3. Trying several combinations of environment variables to switch between native and xwayland mode didn't make a difference. The second reason, not related to FF, is that wine-wayland is still experimental.