--- a/dom/events/EventStateManager.cpp
+++ b/dom/events/EventStateManager.cpp
@@ -924,16 +924,26 @@ EventStateManager::NotifyTargetUserActiv
     return;
   }
 
   nsIDocument* doc = node->OwnerDoc();
   if (!doc || doc->HasBeenUserActivated()) {
     return;
   }
 
+  // Don't gesture activate for key events for keys which are likely
+  // to be interaction with the browser, OS, or likely to be scrolling.
+  WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
+  if (keyEvent && (!keyEvent->PseudoCharCode() ||
+                   (keyEvent->IsControl() && !keyEvent->IsAltGraph()) ||
+                   (keyEvent->IsAlt() && !keyEvent->IsAltGraph()) ||
+                   keyEvent->IsMeta() || keyEvent->IsOS())) {
+    return;
+  }
+
   MOZ_ASSERT(aEvent->mMessage == eKeyDown   ||
              aEvent->mMessage == eMouseDown ||
              aEvent->mMessage == ePointerDown ||
              aEvent->mMessage == eTouchEnd);
   doc->NotifyUserActivation();
 }
 
 already_AddRefed<EventStateManager>