diff --git a/chrome/just-save.js b/chrome/just-save.js
index c9d6e83..57af295 100644
--- a/chrome/just-save.js
+++ b/chrome/just-save.js
@@ -1,4 +1,10 @@
 'use strict';
+// FIXME: need to keep this on a separate codebase due to
+// need for separate manifest file because persistent attribute is rejected
+// https://bugzilla.mozilla.org/show_bug.cgi?id=1253565
+// should be able to revert to single codebase when Firefox 48 is released
+
+// FIXME: figure out how to prevent toolbar icon from being added in chrome
 
 // adding browser shim for chrome support
 window.browser = chrome;