diff --git a/wp-includes/js/tinymce/plugins/wordpress/langs/en.js b/wp-includes/js/tinymce/plugins/wordpress/langs/en.js
index 6eb93e7a0e..49950f0ec6 100644
--- a/wp-includes/js/tinymce/plugins/wordpress/langs/en.js
+++ b/wp-includes/js/tinymce/plugins/wordpress/langs/en.js
@@ -4,6 +4,10 @@ if (navigator.userAgent.indexOf('Mac OS') != -1) {
 // Mac OS browsers use Ctrl to hit accesskeys
 	var metaKey = 'Ctrl';
 }
+else if (navigator.userAgent.indexOf('Firefox/2') != -1) {
+// Firefox 2.x uses Alt+Shift to hit accesskeys
+	var metaKey = 'Alt+Shift';
+}
 else {
 	var metaKey = 'Alt';
 }