--- a/dom/html/HTMLInputElement.cpp
+++ b/dom/html/HTMLInputElement.cpp
@@ -4893,17 +4893,18 @@ HTMLInputElement::PostHandleEvent(EventC
                 do_QueryFrame(GetPrimaryFrame());
               if (numberControlFrame && numberControlFrame->IsFocused()) {
                 StepNumberControlForUserEvent(wheelEvent->mDeltaY > 0 ? -1 : 1);
                 FireChangeEventIfNeeded();
                 aVisitor.mEvent->PreventDefault();
               }
             } else if (mType == NS_FORM_INPUT_RANGE &&
                        nsContentUtils::IsFocusedContent(this) &&
-                       GetMinimum() < GetMaximum()) {
+                       GetMinimum() < GetMaximum() &&
+                       (!IsInNativeAnonymousSubtree() || IsInChromeDocument())) {
               Decimal value = GetValueAsDecimal();
               Decimal step = GetStep();
               if (step == kStepAny) {
                 step = GetDefaultStep();
               }
               MOZ_ASSERT(value.isFinite() && step.isFinite());
               SetValueOfRangeForUserEvent(wheelEvent->mDeltaY < 0 ?
                                           value + step : value - step);