diff --git a/etc/profile.d/swayenv.sh b/etc/profile.d/swayenv.sh
new file mode 100644
index 0000000..a3102a3
--- /dev/null
+++ b/etc/profile.d/swayenv.sh
@@ -0,0 +1,7 @@
+# /etc/profile.d/swayenv.sh
+#
+# This sets the other variables on Wayland.
+
+test "$XDG_SESSION_TYPE" = 'wayland' || return
+test "$XDG_SESSION_DESKTOP" = 'sway' || return
+export MOZ_ENABLE_WAYLAND=1