--- a/browser/components/loop/content/shared/css/panel.css
+++ b/browser/components/loop/content/shared/css/panel.css
@@ -1,12 +1,16 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+body {
+  background: none;
+}
+
 /* Panel styles */
 
 .panel {
   /* hide the extra margin space that the panel resizer now wants to show */
   overflow: hidden;
 }
 
 /* Notifications displayed over tabs */
@@ -21,17 +25,16 @@
 
 /* Tabs and tab selection buttons */
 
 .tab-view {
   display: flex;
   flex-direction: row;
   padding: 10px;
   border-bottom: 1px solid #ccc;
-  background-color: #fbfbfb;
   color: #000;
   border-top-right-radius: 2px;
   border-top-left-radius: 2px;
   list-style: none;
 }
 
 .tab-view > li {
   flex: 1;