--- a/browser/components/customizableui/src/CustomizableUI.jsm
+++ b/browser/components/customizableui/src/CustomizableUI.jsm
@@ -520,17 +520,17 @@ let CustomizableUIInternal = {
           widgetNode.setAttribute("type", "wrap");
         }
       }
 
       let nextNode = nextNodeId ? container.querySelector(idToSelector(nextNodeId))
                                 : null;
       this.insertWidgetBefore(widgetNode, nextNode, container, aArea);
       this._addParentFlex(widgetNode);
-      if (area.get("type") == this.TYPE_TOOLBAR) {
+      if (area.type == this.TYPE_TOOLBAR) {
         areaNode.setAttribute("currentset", areaNode.currentSet);
       }
     }
   },
 
   onWidgetRemoved: function(aWidgetId, aArea) {
     let areaNodes = gBuildAreas.get(aArea);
     if (!areaNodes) {
@@ -563,17 +563,17 @@ let CustomizableUIInternal = {
       } else {
         this.removeLocationAttributes(widgetNode);
         widgetNode.removeAttribute("tabindex");
         if (widgetNode.getAttribute("type") == "wrap") {
           widgetNode.removeAttribute("type");
         }
         areaNode.toolbox.palette.appendChild(widgetNode);
       }
-      if (area.get("type") == this.TYPE_TOOLBAR) {
+      if (area.type == this.TYPE_TOOLBAR) {
         areaNode.setAttribute("currentset", areaNode.currentSet);
       }
     }
   },
 
   onWidgetMoved: function(aWidgetId, aArea, aOldPosition, aNewPosition) {
     let areaNodes = gBuildAreas.get(aArea);
     if (!areaNodes) {
@@ -606,17 +606,17 @@ let CustomizableUIInternal = {
       if (!widgetNode) {
         ERROR("Widget not found, unable to move");
         continue;
       }
 
       let nextNode = nextNodeId ? container.querySelector(idToSelector(nextNodeId))
                                 : null;
       this.insertWidgetBefore(widgetNode, nextNode, container, aArea);
-      if (area.get("type") == this.TYPE_TOOLBAR) {
+      if (area.type == this.TYPE_TOOLBAR) {
         areaNode.setAttribute("currentset", areaNode.currentSet);
       }
     }
   },
 
   registerBuildArea: function(aArea, aNode) {
     // We ensure that the window is registered to have its customization data
     // cleaned up when unloading.