diff --git a/servo/components/style/values/specified/box.rs b/servo/components/style/values/specified/box.rs
index 46d33f3d36f3..d0db3d5d1b61 100644
--- a/servo/components/style/values/specified/box.rs
+++ b/servo/components/style/values/specified/box.rs
@@ -1502,10 +1502,6 @@ pub enum Appearance {
     #[parse(condition = "ParserContext::chrome_rules_enabled")]
     ButtonArrowDown,
     #[parse(condition = "ParserContext::chrome_rules_enabled")]
-    ButtonArrowNext,
-    #[parse(condition = "ParserContext::chrome_rules_enabled")]
-    ButtonArrowPrevious,
-    #[parse(condition = "ParserContext::chrome_rules_enabled")]
     ButtonArrowUp,
     /// Menu Popup background.
     #[parse(condition = "ParserContext::chrome_rules_enabled")]
diff --git a/widget/gtk/gtk3drawing.cpp b/widget/gtk/gtk3drawing.cpp
index 90702d95a20b..2476e994cdd7 100644
--- a/widget/gtk/gtk3drawing.cpp
+++ b/widget/gtk/gtk3drawing.cpp
@@ -774,20 +774,7 @@ static gint moz_gtk_arrow_paint(cairo_t* cr, GdkRectangle* rect,
   GdkRectangle arrow_rect;
   gdouble arrow_angle;
 
-  if (direction == GTK_TEXT_DIR_RTL) {
-    if (arrow_type == GTK_ARROW_LEFT) {
-      arrow_type = GTK_ARROW_RIGHT;
-    } else if (arrow_type == GTK_ARROW_RIGHT) {
-      arrow_type = GTK_ARROW_LEFT;
-    }
-  }
   switch (arrow_type) {
-    case GTK_ARROW_LEFT:
-      arrow_angle = ARROW_LEFT;
-      break;
-    case GTK_ARROW_RIGHT:
-      arrow_angle = ARROW_RIGHT;
-      break;
     case GTK_ARROW_DOWN:
       arrow_angle = ARROW_DOWN;
       break;
diff --git a/widget/gtk/nsNativeThemeGTK.cpp b/widget/gtk/nsNativeThemeGTK.cpp
index 28443d1c9427..cae161505a44 100644
--- a/widget/gtk/nsNativeThemeGTK.cpp
+++ b/widget/gtk/nsNativeThemeGTK.cpp
@@ -266,18 +266,12 @@ bool nsNativeThemeGTK::GetGtkWidgetAndState(StyleAppearance aAppearance,
     case StyleAppearance::ToolbarbuttonDropdown:
     case StyleAppearance::ButtonArrowDown:
     case StyleAppearance::ButtonArrowUp:
-    case StyleAppearance::ButtonArrowNext:
-    case StyleAppearance::ButtonArrowPrevious:
       aGtkWidgetType = MOZ_GTK_TOOLBARBUTTON_ARROW;
       if (aWidgetFlags) {
         *aWidgetFlags = GTK_ARROW_DOWN;
 
         if (aAppearance == StyleAppearance::ButtonArrowUp)
           *aWidgetFlags = GTK_ARROW_UP;
-        else if (aAppearance == StyleAppearance::ButtonArrowNext)
-          *aWidgetFlags = GTK_ARROW_RIGHT;
-        else if (aAppearance == StyleAppearance::ButtonArrowPrevious)
-          *aWidgetFlags = GTK_ARROW_LEFT;
       }
       break;
     case StyleAppearance::ProgressBar:
@@ -853,8 +847,6 @@ bool nsNativeThemeGTK::GetWidgetPadding(nsDeviceContext* aContext,
     case StyleAppearance::ToolbarbuttonDropdown:
     case StyleAppearance::ButtonArrowUp:
     case StyleAppearance::ButtonArrowDown:
-    case StyleAppearance::ButtonArrowNext:
-    case StyleAppearance::ButtonArrowPrevious:
     case StyleAppearance::RangeThumb:
       aResult->SizeTo(0, 0, 0, 0);
       return true;
@@ -942,9 +934,7 @@ LayoutDeviceIntSize nsNativeThemeGTK::GetMinimumWidgetSize(
     } break;
     case StyleAppearance::ToolbarbuttonDropdown:
     case StyleAppearance::ButtonArrowUp:
-    case StyleAppearance::ButtonArrowDown:
-    case StyleAppearance::ButtonArrowNext:
-    case StyleAppearance::ButtonArrowPrevious: {
+    case StyleAppearance::ButtonArrowDown: {
       moz_gtk_get_arrow_size(MOZ_GTK_TOOLBARBUTTON_ARROW, &result.width,
                              &result.height);
     } break;
@@ -1037,8 +1027,6 @@ nsNativeThemeGTK::ThemeSupportsWidget(nsPresContext* aPresContext,
     case StyleAppearance::ToolbarbuttonDropdown:
     case StyleAppearance::ButtonArrowUp:
     case StyleAppearance::ButtonArrowDown:
-    case StyleAppearance::ButtonArrowNext:
-    case StyleAppearance::ButtonArrowPrevious:
     case StyleAppearance::Listbox:
     case StyleAppearance::ProgressBar:
     case StyleAppearance::Progresschunk:
@@ -1068,10 +1056,9 @@ nsNativeThemeGTK::WidgetIsContainer(StyleAppearance aAppearance) {
   // XXXdwh At some point flesh all of this out.
   if (aAppearance == StyleAppearance::RangeThumb ||
       aAppearance == StyleAppearance::ButtonArrowUp ||
-      aAppearance == StyleAppearance::ButtonArrowDown ||
-      aAppearance == StyleAppearance::ButtonArrowNext ||
-      aAppearance == StyleAppearance::ButtonArrowPrevious)
+      aAppearance == StyleAppearance::ButtonArrowDown) {
     return false;
+  }
   return true;
 }
 
diff --git a/widget/nsNativeTheme.cpp b/widget/nsNativeTheme.cpp
index dc183438c4bd..3495ff8725c8 100644
--- a/widget/nsNativeTheme.cpp
+++ b/widget/nsNativeTheme.cpp
@@ -54,8 +54,6 @@ NS_IMPL_ISUPPORTS(nsNativeTheme, nsITimerCallback, nsINamed)
     if (aAppearance == StyleAppearance::Checkbox ||
         aAppearance == StyleAppearance::Radio ||
         aAppearance == StyleAppearance::ToolbarbuttonDropdown ||
-        aAppearance == StyleAppearance::ButtonArrowPrevious ||
-        aAppearance == StyleAppearance::ButtonArrowNext ||
         aAppearance == StyleAppearance::ButtonArrowUp ||
 #ifdef MOZ_WIDGET_GTK
         aAppearance == StyleAppearance::MozWindowButtonClose ||