diff --git a/chrome.manifest b/chrome.manifest
index 1f3000914d..f1b3279a8e 100644
--- a/chrome.manifest
+++ b/chrome.manifest
@@ -44,6 +44,7 @@ locale	zotero	zh-TW		chrome/locale/zh-TW/zotero/
 
 skin		zotero	default		chrome/skin/default/zotero/
 
+overlay	chrome://browser/content/browser.xul	chrome://zotero/content/statusBarOverlay.xul appversion<4.0
 overlay	chrome://browser/content/browser.xul	chrome://zotero/content/overlay.xul
 overlay	chrome://browser/content/browser.xul	chrome://zotero/content/itemPane.xul
 
diff --git a/chrome/content/zotero/overlay.xul b/chrome/content/zotero/overlay.xul
index e128d12a31..a88b8f4ce1 100644
--- a/chrome/content/zotero/overlay.xul
+++ b/chrome/content/zotero/overlay.xul
@@ -467,62 +467,85 @@
 		<image src="chrome://zotero/skin/treeitem-book.png" id="zotero-status-image" onclick="Zotero_Browser.scrapeThisPage(ZoteroPane.getSelectedLibraryID(), ZoteroPane.getSelectedCollection(true))" position="1" hidden="true"/>
 	</hbox>
 	
-	<statusbar id="status-bar">
-		<statusbarpanel id="zotero-status-bar-icon" hidden="true"
-			class="statusbarpanel-iconic" onclick="ZoteroPane.toggleDisplay();"/>
-	</statusbar>
-	
 	<script>
 	<![CDATA[
 	window.addEventListener('load', function(e){
-		var icon = document.getElementById('zotero-status-bar-icon');
-		if(icon) {
-			if (Zotero && Zotero.initialized){
-				switch (Zotero.Prefs.get('statusBarIcon')) {
-					case 2:
-						icon.setAttribute('hidden', false);
-						break;
-					case 1:
-						icon.setAttribute('hidden', false);
-						icon.setAttribute('compact', true);
-						break;
+		var iconPref = Components.classes["@mozilla.org/preferences-service;1"]
+							.getService(Components.interfaces.nsIPrefService)
+							.getBranch('extensions.zotero.').getIntPref('statusBarIcon');
+		var isFx36 = Components.classes["@mozilla.org/xre/app-info;1"]
+						.getService(Components.interfaces.nsIXULAppInfo)
+						.platformVersion.indexOf('1.9') === 0;
+		
+		// Status bar in Fx3.6
+		if (isFx36) {
+			var icon = document.getElementById('zotero-status-bar-icon');
+		}
+		// In >=Fx4, add to add-on bar
+		else {
+			var icon = document.createElement('toolbarbutton');
+			icon.id = 'zotero-addon-bar-icon';
+			icon.setAttribute('oncommand', 'ZoteroPane.toggleDisplay()');
+			icon.setAttribute('hidden', true);
+			var addonBar = document.getElementById('addon-bar');
+			addonBar.appendChild(icon);
+			if (addonBar.collapsed) {
+				// If no Zotero or icon isn't set to hidden, show add-on bar
+				if (iconPref != 0) {
+					setToolbarVisibility(addonBar, true);
 				}
-				
-				// Set "Report Errors..." label via property rather than DTD entity,
-				// since we need to reference it in script elsewhere
-				document.getElementById('zotero-tb-actions-reportErrors').setAttribute('label',
-					Zotero.getString('errorReport.reportErrors'));
 			}
-			else {
-				if (Zotero) {
-					var errMsg = Zotero.startupError;
-				}
-				
-				// Use defaults if necessary
-				if (!errMsg) {
-					// Get the stringbundle manually
-					var src = 'chrome://zotero/locale/zotero.properties';
-					var localeService = Components.classes['@mozilla.org/intl/nslocaleservice;1'].
-							getService(Components.interfaces.nsILocaleService);
-					var appLocale = localeService.getApplicationLocale();
-					var stringBundleService = Components.classes["@mozilla.org/intl/stringbundle;1"]
-						.getService(Components.interfaces.nsIStringBundleService);
-					var stringBundle = stringBundleService.createBundle(src, appLocale);
-					
-					var errMsg = stringBundle.GetStringFromName('startupError');
-				}
-				
-				if(icon) {
-					icon.setAttribute('tooltiptext', errMsg);
-					icon.setAttribute('error', 'true');
+		}
+		
+		if (!icon) {
+			return;
+		}
+		
+		if (Zotero && Zotero.initialized){
+			switch (iconPref) {
+				case 2:
 					icon.setAttribute('hidden', false);
-				}
+					break;
+				case 1:
+					icon.setAttribute('hidden', false);
+					icon.setAttribute('compact', true);
+					break;
 			}
 			
-			// Used for loading pages from upgrade wizard
-			if (Zotero.initialURL) {
-				setTimeout("gBrowser.selectedTab = gBrowser.addTab(Zotero.initialURL); Zotero.initialURL = null;", 1);
+			// Set "Report Errors..." label via property rather than DTD entity,
+			// since we need to reference it in script elsewhere
+			document.getElementById('zotero-tb-actions-reportErrors').setAttribute('label',
+				Zotero.getString('errorReport.reportErrors'));
+		}
+		else {
+			if (Zotero) {
+				var errMsg = Zotero.startupError;
 			}
+			
+			// Use defaults if necessary
+			if (!errMsg) {
+				// Get the stringbundle manually
+				var src = 'chrome://zotero/locale/zotero.properties';
+				var localeService = Components.classes['@mozilla.org/intl/nslocaleservice;1'].
+						getService(Components.interfaces.nsILocaleService);
+				var appLocale = localeService.getApplicationLocale();
+				var stringBundleService = Components.classes["@mozilla.org/intl/stringbundle;1"]
+					.getService(Components.interfaces.nsIStringBundleService);
+				var stringBundle = stringBundleService.createBundle(src, appLocale);
+				
+				var errMsg = stringBundle.GetStringFromName('startupError');
+			}
+			
+			if(icon) {
+				icon.setAttribute('tooltiptext', errMsg);
+				icon.setAttribute('error', 'true');
+				icon.setAttribute('hidden', false);
+			}
+		}
+		
+		// Used for loading pages from upgrade wizard
+		if (Zotero.initialURL) {
+			setTimeout("gBrowser.selectedTab = gBrowser.addTab(Zotero.initialURL); Zotero.initialURL = null;", 1);
 		}
 	}, false);
 	
diff --git a/chrome/content/zotero/statusBarOverlay.xul b/chrome/content/zotero/statusBarOverlay.xul
new file mode 100644
index 0000000000..6aab09a6da
--- /dev/null
+++ b/chrome/content/zotero/statusBarOverlay.xul
@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<overlay id="zotero-status-bar"
+	xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+	
+	<statusbar id="status-bar">
+		<statusbarpanel id="zotero-status-bar-icon" hidden="true"
+			class="statusbarpanel-iconic" onclick="ZoteroPane.toggleDisplay();"/>
+	</statusbar>
+</overlay>
diff --git a/chrome/skin/default/zotero/overlay.css b/chrome/skin/default/zotero/overlay.css
index b8ae7e8b7f..7e7d493c18 100644
--- a/chrome/skin/default/zotero/overlay.css
+++ b/chrome/skin/default/zotero/overlay.css
@@ -1,18 +1,25 @@
-#zotero-status-bar-icon
+#zotero-status-bar-icon, #zotero-addon-bar-icon
 {
 	width: 55px;
-	margin: 0 0 -1px; /* For Fitts's law (on OS X, at least) */
-	padding: 0 0 1px;
 	list-style-image: url(chrome://zotero/skin/zotero_status_bar.png);
 }
-#zotero-status-bar-icon[compact="true"]
+#zotero-status-bar-icon
+{
+	margin: 0 0 -1px; /* For Fitts's law (on OS X, at least) */
+	padding: 0 0 1px;
+}
+#zotero-addon-bar-icon
+{
+	margin-left: 10px;
+	margin-right: 10px;
+	padding-bottom: 4px;
+}
+#zotero-status-bar-icon[compact="true"], #zotero-addon-bar-icon[compact="true"]
 {
 	width: 20px;
-	margin: 0 0 -1px;
-	padding: 0 0 1px;
 	list-style-image: url(chrome://zotero/skin/zotero_status_bar_compact.png);
 }
-#zotero-status-bar-icon[error="true"]
+#zotero-status-bar-icon[error="true"], #zotero-addon-bar-icon[error="true"]
 {
 	list-style-image: url(chrome://zotero/skin/zotero_status_bar_error.png);
 }