--- hamburger.old/bootstrap.js
+++ hamburger/bootstrap.js
@@ -10,7 +10,7 @@
 const ICONS_URL = "chrome://" + EXT_NAME + "/content/";
 const DEFAULT_PREFS = {
     toolbarButtonPlaceId: "nav-bar",
-    toolbarButtonPosition: 0
+    toolbarButtonPosition: 100
 };
 
 let Prefs = null;