deleted file mode 100644
--- a/browser/themes/shared/controlcenter/arrow-subview-back.svg
+++ /dev/null
@@ -1,8 +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="16" height="16" viewBox="0 0 16 16">
-#include ../icon-colors.inc.svg
-  <polygon class="highlighttext" points="12,3.5 10.5,2 4.625,8 10.5,14 12,12.5 7.625,8"/>
-</svg>

deleted file mode 100644
--- a/browser/themes/shared/controlcenter/arrow-subview.svg
+++ /dev/null
@@ -1,8 +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="16" height="16" viewBox="0 0 16 16">
-#include ../icon-colors.inc.svg
-  <polygon class="fieldtext" points="5,3.5 6.5,2 12.375,8 6.5,14 5,12.5 9.375,8"/>
-</svg>

--- a/browser/themes/shared/controlcenter/panel.inc.css
+++ b/browser/themes/shared/controlcenter/panel.inc.css
@@ -122,43 +122,48 @@
 
 /* EXPAND BUTTON */
 
 .identity-popup-expander {
   margin: 0;
   padding: 4px 0;
   min-width: auto;
   width: var(--identity-popup-expander-width);
-  border: 0 none;
+  border-style: none;
   -moz-appearance: none;
-  background: url("chrome://browser/skin/controlcenter/arrow-subview.svg") center no-repeat;
+  background: url("chrome://browser/skin/arrow-left.svg") center no-repeat;
   background-size: 16px, auto;
-}
-
-.identity-popup-expander:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
+  -moz-context-properties: fill;
+  fill: currentColor;
+  color: inherit;
 }
 
 .identity-popup-expander[panel-multiview-anchor] {
   transition: background-color 250ms ease-in;
   background-color: Highlight;
-  background-image: url("chrome://browser/skin/controlcenter/arrow-subview-back.svg");
+  background-image: url("chrome://browser/skin/arrow-left.svg");
+  color: HighlightText;
+}
+
+.identity-popup-expander[panel-multiview-anchor]:-moz-locale-dir(rtl),
+.identity-popup-expander:not([panel-multiview-anchor]):-moz-locale-dir(ltr) {
+  transform: scaleX(-1);
 }
 
 .identity-popup-expander > .button-box {
   padding: 0;
 }
 
 .identity-popup-expander:not([panel-multiview-anchor]) > .button-box {
-  border-left: 1px solid var(--panel-separator-color);
+  border-right: 1px solid var(--panel-separator-color);
 }
 
 .identity-popup-expander:hover {
   background-color: var(--arrowpanel-dimmed);
-  background-image: url("chrome://browser/skin/controlcenter/arrow-subview.svg");
+  background-image: url("chrome://browser/skin/arrow-left.svg");
 }
 
 .identity-popup-expander:hover:active {
   background-color: var(--arrowpanel-dimmed-further);
   box-shadow: 0 1px 0 hsla(210,4%,10%,.05) inset;
 }
 
 /* CONTENT */

--- a/browser/themes/shared/jar.inc.mn
+++ b/browser/themes/shared/jar.inc.mn
@@ -18,18 +18,16 @@
   skin/classic/browser/addons/addon-install-blocked.svg        (../shared/addons/addon-install-blocked.svg)
   skin/classic/browser/addons/addon-install-confirm.svg        (../shared/addons/addon-install-confirm.svg)
   skin/classic/browser/addons/addon-install-downloading.svg    (../shared/addons/addon-install-downloading.svg)
   skin/classic/browser/addons/addon-install-error.svg          (../shared/addons/addon-install-error.svg)
   skin/classic/browser/addons/addon-install-installed.svg      (../shared/addons/addon-install-installed.svg)
   skin/classic/browser/addons/addon-install-restart.svg        (../shared/addons/addon-install-restart.svg)
   skin/classic/browser/addons/addon-install-warning.svg        (../shared/addons/addon-install-warning.svg)
 * skin/classic/browser/addons/addon-install-anchor.svg         (../shared/addons/addon-install-anchor.svg)
-* skin/classic/browser/controlcenter/arrow-subview.svg         (../shared/controlcenter/arrow-subview.svg)
-* skin/classic/browser/controlcenter/arrow-subview-back.svg    (../shared/controlcenter/arrow-subview-back.svg)
 * skin/classic/browser/controlcenter/conn-not-secure.svg       (../shared/controlcenter/conn-not-secure.svg)
 * skin/classic/browser/controlcenter/connection.svg            (../shared/controlcenter/connection.svg)
 * skin/classic/browser/controlcenter/mcb-disabled.svg          (../shared/controlcenter/mcb-disabled.svg)
   skin/classic/browser/controlcenter/extension.svg             (../shared/controlcenter/extension.svg)
 * skin/classic/browser/controlcenter/permissions.svg           (../shared/controlcenter/permissions.svg)
 * skin/classic/browser/controlcenter/tracking-protection.svg   (../shared/controlcenter/tracking-protection.svg)
   skin/classic/browser/controlcenter/warning-gray.svg          (../shared/controlcenter/warning-gray.svg)
   skin/classic/browser/controlcenter/warning-yellow.svg        (../shared/controlcenter/warning-yellow.svg)