diff --git a/chrome/content/zotero/overlay.js b/chrome/content/zotero/overlay.js
index b6da4fedb6..0aed77312d 100644
--- a/chrome/content/zotero/overlay.js
+++ b/chrome/content/zotero/overlay.js
@@ -2557,6 +2557,18 @@ var ZoteroPane = new function()
 	 *  shift-click == new window, no modifier == frontmost tab
 	 */
 	function loadURI(uri, event, data) {
+		if (Zotero.isStandalone && uri.match("^https?")) {
+			var io = Components.classes['@mozilla.org/network/io-service;1']
+						.getService(Components.interfaces.nsIIOService);
+			var uri = io.newURI(uri, null, null);
+			var handler = Components.classes['@mozilla.org/uriloader/external-protocol-service;1']
+						.getService(Components.interfaces.nsIExternalProtocolService)
+						.getProtocolHandlerInfo('http');
+			handler.preferredAction = Components.interfaces.nsIHandlerInfo.useSystemDefault;
+			handler.launchWithURI(uri, null);
+			return;
+		}
+		
 		// Open in new tab
 		if (event && (event.metaKey || (!Zotero.isMac && event.ctrlKey))) {
 			var tab = gBrowser.addTab(uri);