diff --git a/content/treestyletab/treestyletabbrowser.js b/content/treestyletab/treestyletabbrowser.js
index f4e84267..8353f33a 100644
--- a/content/treestyletab/treestyletabbrowser.js
+++ b/content/treestyletab/treestyletabbrowser.js
@@ -575,6 +575,7 @@ TreeStyleTabBrowser.prototype = {
 		this.onPrefChange('extensions.treestyletab.showBorderForFirstTab');
 		this.onPrefChange('extensions.treestyletab.tabbar.invertTabContents');
 		this.onPrefChange('extensions.treestyletab.tabbar.invertClosebox');
+		this.onPrefChange('extensions.treestyletab.tabbar.autoShow.mousemove');
 		this.onPrefChange('extensions.treestyletab.animation.enabled');
 
 		var tabContextMenu = b.tabContextMenu ||
@@ -1775,6 +1776,17 @@ TreeStyleTabBrowser.prototype = {
 				this.checkTabsIndentOverflow();
 				return;
 
+			case 'extensions.treestyletab.tabbar.autoShow.mousemove':
+				let (toggler = document.getAnonymousElementByAttribute(b, 'class', this.kTABBAR_TOGGLER)) {
+					if (toggler) {
+						if (value)
+							toggler.removeAttribute('hidden');
+						else
+							toggler.setAttribute('hidden', true);
+					}
+				}
+				return;
+
 			case 'extensions.treestyletab.maxTreeLevel.phisical':
 				if (this.maxTreeLevelPhisical = value)
 					this.promoteTooDeepLevelTabs();