diff --git a/www/js/lib/uiUtil.js b/www/js/lib/uiUtil.js
index a6a8b834..e504a5c1 100644
--- a/www/js/lib/uiUtil.js
+++ b/www/js/lib/uiUtil.js
@@ -22,7 +22,8 @@
 'use strict';
 
 // DEV: Please put your RequireJS definition in the rqDef array below, and any function exports in the function parenthesis of the define statement
-// (we need to do it this way in order to load WebP polyfills conditionally)
+// We need to do it this way in order to load WebP polyfills conditionally. The WebP polyfills are only needed by a few old browsers, so loading them
+// only if needed saves approximately 1MB of memory.
 var rqDef = [];
 
 // Add WebP polyfill only if webpHero was loaded in init.js