diff --git a/browser/themes/gnomestripe/browser.css b/browser/themes/gnomestripe/browser.css
index a136fc981ab..00c43f60d76 100644
--- a/browser/themes/gnomestripe/browser.css
+++ b/browser/themes/gnomestripe/browser.css
@@ -2835,17 +2835,11 @@ chatbox[minimized="true"] {
   height: 20px;
 }
 
-panel[type="arrow"][popupid="click-to-play-plugins"] > .panel-arrowcontainer > .panel-arrowbox > .panel-arrow[side="top"],
-panel[type="arrow"][popupid="click-to-play-plugins"] > .panel-arrowcontainer > .panel-arrowbox > .panel-arrow[side="bottom"] {
-  list-style-image: url("chrome://global/skin/icons/panelarrow-light-vertical.svg");
-}
-
 .click-to-play-plugins-notification-content {
   margin: -10px;
 }
 
 .click-to-play-plugins-notification-icon-box {
-  background: hsla(0,0%,100%,.4);
   -moz-border-end: 1px solid hsla(0,0%,100%,.2);
   padding-top: 16px;
   -moz-padding-start: 16px;
diff --git a/browser/themes/winstripe/browser.css b/browser/themes/winstripe/browser.css
index 88a4e42ed02..ef3b0209b8f 100644
--- a/browser/themes/winstripe/browser.css
+++ b/browser/themes/winstripe/browser.css
@@ -3531,7 +3531,6 @@ chatbox[minimized="true"] {
 }
 
 .click-to-play-plugins-notification-icon-box {
-  background: hsla(0,0%,100%,.4);
   -moz-border-end: 1px solid hsla(0,0%,100%,.2);
   padding-top: 16px;
   -moz-padding-end: 16px;
diff --git a/toolkit/themes/gnomestripe/global/icons/panelarrow-light-vertical.svg b/toolkit/themes/gnomestripe/global/icons/panelarrow-light-vertical.svg
deleted file mode 100644
index 8b59ed77095..00000000000
--- a/toolkit/themes/gnomestripe/global/icons/panelarrow-light-vertical.svg
+++ /dev/null
@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- 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/. -->
-
-<svg xmlns="http://www.w3.org/2000/svg"
-     width="20"
-     height="10">
-  <path d="M 0,10 L 10,0 20,10 z"
-        fill="-moz-Dialog"/>
-  <path d="M 0,10 L 10,0 20,10 z"
-        fill="hsla(0,0%,100%,.4)"/>
-</svg>
diff --git a/toolkit/themes/gnomestripe/global/jar.mn b/toolkit/themes/gnomestripe/global/jar.mn
index 9216495c145..8dcf16fcfda 100644
--- a/toolkit/themes/gnomestripe/global/jar.mn
+++ b/toolkit/themes/gnomestripe/global/jar.mn
@@ -47,7 +47,6 @@ toolkit.jar:
 +  skin/classic/global/icons/notloading_16.png                 (icons/notloading_16.png)
 +  skin/classic/global/icons/panelarrow-horizontal.svg         (icons/panelarrow-horizontal.svg)
 +  skin/classic/global/icons/panelarrow-vertical.svg           (icons/panelarrow-vertical.svg)
-+  skin/classic/global/icons/panelarrow-light-vertical.svg   (icons/panelarrow-light-vertical.svg)
 +  skin/classic/global/icons/resizer.png                       (icons/resizer.png)
 +  skin/classic/global/icons/sslWarning.png                    (icons/sslWarning.png)
 +  skin/classic/global/icons/wrap.png                          (icons/wrap.png)