diff --git a/core/modules/responsive_preview/css/responsive-preview.theme.css b/core/modules/responsive_preview/css/responsive-preview.theme.css
index ee845f8..00c147c 100644
--- a/core/modules/responsive_preview/css/responsive-preview.theme.css
+++ b/core/modules/responsive_preview/css/responsive-preview.theme.css
@@ -197,7 +197,6 @@
 .responsive-preview-device-details-trigger {
   color: #666;
   cursor: pointer;
-  text-transform: lowercase;
 }
 .responsive-preview-device-details-trigger:hover {
   color: #bbb;
diff --git a/core/modules/responsive_preview/js/responsive-preview.js b/core/modules/responsive_preview/js/responsive-preview.js
index cb68a2c..9c1c55f 100644
--- a/core/modules/responsive_preview/js/responsive-preview.js
+++ b/core/modules/responsive_preview/js/responsive-preview.js
@@ -14,7 +14,7 @@ var options = $.extend({
   // therefore it must be defined here instead of in the CSS file.
   bleed: 30,
   strings: {
-    details: Drupal.t('Details'),
+    details: Drupal.t('details'),
     close: Drupal.t('Close'),
     orientation: Drupal.t('Change orientation'),
     portrait: Drupal.t('Portrait'),