diff --git a/modules/browser.js b/modules/browser.js
index 102f94ea..bde7fac9 100644
--- a/modules/browser.js
+++ b/modules/browser.js
@@ -1748,7 +1748,7 @@ TreeStyleTabBrowser.prototype = {
 		if (splitter.collapsed || splitter.getAttribute('state') != 'collapsed') {
 			this._tabStripPlaceHolder.collapsed =
 				splitter.collapsed =
-					(this.getPref('browser.tabs.autoHide') && this.getTabs(this.mTabBrowser).length == 1);
+					(this.getPref('browser.tabs.autoHide') && this.getExistingTabsCount() == 1);
 		}
 
 		var strip = this.tabStrip;
@@ -1849,6 +1849,10 @@ TreeStyleTabBrowser.prototype = {
 		else
 			this.positionPinnedTabsWithDelay(null, null, aReason & this.kTABBAR_UPDATE_BY_AUTOHIDE);
 	},
+	getExistingTabsCount : function TSTBrowser_getTabsCount() 
+	{
+		return this.getAllTabs(this.mTabBrowser).length - this.mTabBrowser._removingTabs.length;
+	},
  
 	_updateFloatingTabbarResizer : function TSTBrowser_updateFloatingTabbarResizer(aSize) 
 	{