diff --git a/module/sway/module/99-Firefox b/module/sway/module/99-Firefox
new file mode 100644
index 0000000..e956ab0
--- /dev/null
+++ b/module/sway/module/99-Firefox
@@ -0,0 +1,4 @@
+# Fix for a goddamn Firefox WebRTC indicator.
+for_window [app_id="firefox" title="Firefox — Sharing Indicator"] {
+	kill
+}