diff --git a/area-model-decimals_a11y_view.html b/area-model-decimals_a11y_view.html
index 8126f96..90747ac 100644
--- a/area-model-decimals_a11y_view.html
+++ b/area-model-decimals_a11y_view.html
@@ -238,8 +238,9 @@ <h3>PDOM & Descriptions for Area Model Decimals</h3>
     for ( var i = 0; i < allElements.length; i++ ) {
       var element = allElements[ i ];
 
+      // TODO: see https://github.com/phetsims/chipper/issues/740, for some reason this makes Chrome very slow
       // make sure nothing in copy is focusable
-      element.tabIndex = "-1";
+      element.tabIndex = '-1';
 
       // make sure that styling is removed, unless some styling was added just for the copy
       if ( element.className !== "pdom-style" ) {
diff --git a/area-model-decimals_en.html b/area-model-decimals_en.html
index 8ec796b..f0dcbed 100644
--- a/area-model-decimals_en.html
+++ b/area-model-decimals_en.html
@@ -41,6 +41,7 @@
       '../assert/js/assert.js',
       '../query-string-machine/js/QueryStringMachine.js',
       '../chipper/js/initialize-globals.js',
+      '../phet-core/js/copyWithSortedKeys.js',
       '../sherpa/lib/seedrandom-2.4.2.js',
       '../sherpa/lib/game-up-camera-1.0.0.js',
       '../sherpa/lib/base64-js-1.2.0.js',
diff --git a/js/area-model-decimals-config.js b/js/area-model-decimals-config.js
index 6e1f584..e533f89 100644
--- a/js/area-model-decimals-config.js
+++ b/js/area-model-decimals-config.js
@@ -1,4 +1,4 @@
-// Copyright 2018, University of Colorado Boulder
+// Copyright 2019, University of Colorado Boulder
 
 /*
  * IMPORTANT: This file was auto-generated by "grunt generate-config". Please do not modify this directly. Instead