diff --git a/client/components/swimlanes/swimlanes.styl b/client/components/swimlanes/swimlanes.styl
index e4e2cd3b9..754d7210b 100644
--- a/client/components/swimlanes/swimlanes.styl
+++ b/client/components/swimlanes/swimlanes.styl
@@ -54,6 +54,12 @@
   flex-direction: row
   height: 100%
 
+@-moz-document url-prefix() {
+  .list-group {
+    overflow: hidden;
+  }
+}
+
 swimlane-color(background, color...)
   background: background !important
   if color