1 files changed, 2 insertions, 0 deletions
diff --git a/components/script/dom/htmltextareaelement.rs b/components/script/dom/htmltextareaelement.rs
index f9735e76c15..9b3f50bf91e 100644
--- a/components/script/dom/htmltextareaelement.rs
+++ b/components/script/dom/htmltextareaelement.rs
@@ -352,9 +352,11 @@ impl VirtualMethods for HTMLTextAreaElement {
                         }
 
                         self.force_relayout();
+                        event.PreventDefault();
                     }
                     KeyReaction::RedrawSelection => {
                         self.force_relayout();
+                        event.PreventDefault();
                     }
                     KeyReaction::Nothing => (),
                 }