--- a/browser/base/content/abouthome/aboutHome.css
+++ b/browser/base/content/abouthome/aboutHome.css
@@ -109,30 +109,28 @@ a {
 #searchSubmit {
   margin-inline-start: -1px;
   color: transparent;
   background: url("chrome://browser/skin/search-arrow-go.svg") center center no-repeat, linear-gradient(hsla(0,0%,100%,.8), hsla(0,0%,100%,.1)) padding-box;
   -moz-context-properties: fill;
   fill: #616366;
   padding: 0;
   border: 1px solid;
-  border-color: hsla(210,54%,20%,.15) hsla(210,54%,20%,.17) hsla(210,54%,20%,.2);
+  border-color: hsla(210,54%,20%,.15) hsla(210,54%,20%,.17) hsla(210,54%,20%,.2) transparent;
   border-radius: 0 2px 2px 0;
-  border-inline-start: 1px solid transparent;
   box-shadow: 0 0 2px hsla(0,0%,100%,.5) inset,
               0 1px 0 hsla(0,0%,100%,.2);
   cursor: pointer;
   transition-property: background-color, border-color, box-shadow;
   transition-duration: 150ms;
   width: 50px;
 }
 
 #searchSubmit:dir(rtl) {
-  border-radius: 2px 0 0 2px;
-  background-image: url("chrome://browser/skin/search-arrow-go-rtl.svg"), linear-gradient(hsla(0,0%,100%,.8), hsla(0,0%,100%,.1));
+  transform: scaleX(-1);
 }
 
 #searchText:focus + #searchSubmit,
 #searchText[keepfocus] + #searchSubmit,
 #searchText + #searchSubmit:hover,
 #searchText[autofocus] + #searchSubmit {
   border-color: #59b5fc #45a3e7 #3294d5;
 }
@@ -142,37 +140,25 @@ a {
 #searchText[autofocus] + #searchSubmit {
   background-image: url("chrome://browser/skin/search-arrow-go.svg"), linear-gradient(#4cb1ff, #1793e5);
   fill: white;
   box-shadow: 0 1px 0 hsla(0,0%,100%,.2) inset,
               0 0 0 1px hsla(0,0%,100%,.1) inset,
               0 1px 0 hsla(210,54%,20%,.03);
 }
 
-#searchText:focus + #searchSubmit:dir(rtl),
-#searchText[keepfocus] + #searchSubmit:dir(rtl),
-#searchText[autofocus] + #searchSubmit:dir(rtl) {
-  background-image: url("chrome://browser/skin/search-arrow-go-rtl.svg"), linear-gradient(#4cb1ff, #1793e5);
-  fill: white;
-}
-
 #searchText + #searchSubmit:hover {
   background-image: url("chrome://browser/skin/search-arrow-go.svg"), linear-gradient(#66bdff, #0d9eff);
   fill: white;
   box-shadow: 0 1px 0 hsla(0,0%,100%,.2) inset,
               0 0 0 1px hsla(0,0%,100%,.1) inset,
               0 1px 0 hsla(210,54%,20%,.03),
               0 0 4px hsla(206,100%,20%,.2);
 }
 
-#searchText + #searchSubmit:dir(rtl):hover {
-  background-image: url("chrome://browser/skin/search-arrow-go-rtl.svg"), linear-gradient(#66bdff, #0d9eff);
-  fill: white;
-}
-
 #searchText + #searchSubmit:hover:active {
   box-shadow: 0 1px 1px hsla(211,79%,6%,.1) inset,
               0 0 1px hsla(211,79%,6%,.2) inset;
   transition-duration: 0ms;
 }
 
 #defaultSnippet1,
 #defaultSnippet2,

--- a/browser/base/content/newtab/newTab.css
+++ b/browser/base/content/newtab/newTab.css
@@ -400,30 +400,28 @@ body.compact #newtab-search-container {
 #newtab-search-submit {
   margin-inline-start: -1px;
   color: transparent;
   background: url("chrome://browser/skin/search-arrow-go.svg") center center no-repeat, linear-gradient(hsla(0,0%,100%,.8), hsla(0,0%,100%,.1)) padding-box;
   -moz-context-properties: fill;
   fill: #616366;
   padding: 0;
   border: 1px solid;
-  border-color: hsla(210,54%,20%,.15) hsla(210,54%,20%,.17) hsla(210,54%,20%,.2);
+  border-color: hsla(210,54%,20%,.15) hsla(210,54%,20%,.17) hsla(210,54%,20%,.2) transparent;
   border-radius: 0 2px 2px 0;
-  border-inline-start: 1px solid transparent;
   box-shadow: 0 0 2px hsla(0,0%,100%,.5) inset,
               0 1px 0 hsla(0,0%,100%,.2);
   cursor: pointer;
   transition-property: background-color, border-color, box-shadow;
   transition-duration: 150ms;
   width: 50px;
 }
 
 #newtab-search-submit:dir(rtl) {
-  border-radius: 2px 0 0 2px;
-  background-image: url("chrome://browser/skin/search-arrow-go-rtl.svg"), linear-gradient(hsla(0,0%,100%,.8), hsla(0,0%,100%,.1));
+  transform: scaleX(-1);
 }
 
 #newtab-search-text:focus + #newtab-search-submit,
 #newtab-search-text + #newtab-search-submit:hover,
 #newtab-search-text[autofocus] + #newtab-search-submit {
   border-color: #59b5fc #45a3e7 #3294d5;
 }
 
@@ -447,24 +445,16 @@ body.compact #newtab-search-container {
 }
 
 #newtab-search-text + #newtab-search-submit:hover:active {
   box-shadow: 0 1px 1px hsla(211,79%,6%,.1) inset,
               0 0 1px hsla(211,79%,6%,.2) inset;
   transition-duration: 0ms;
 }
 
-#newtab-search-text:focus + #newtab-search-submit:dir(rtl),
-#newtab-search-text[keepfocus] + #newtab-search-submit:dir(rtl),
-#newtab-search-text[autofocus] + #newtab-search-submit:dir(rtl),
-#newtab-search-text + #newtab-search-submit:dir(rtl):hover {
-  background-image: url("chrome://browser/skin/search-arrow-go-rtl.svg"), linear-gradient(#4cb1ff, #1793e5);
-  fill: white;
-}
-
 /* CUSTOMIZE */
 #newtab-customize-overlay {
   opacity: 0;
   display: none;
   width: 100%;
   height: 100%;
   background: #F9F9F9;
   z-index: 100;

--- a/browser/themes/shared/jar.inc.mn
+++ b/browser/themes/shared/jar.inc.mn
@@ -137,17 +137,16 @@
   skin/classic/browser/searchReset.css                         (../shared/searchReset.css)
   skin/classic/browser/badge-add-engine.png                    (../shared/search/badge-add-engine.png)
   skin/classic/browser/badge-add-engine@2x.png                 (../shared/search/badge-add-engine@2x.png)
   skin/classic/browser/search-indicator-badge-add.png          (../shared/search/search-indicator-badge-add.png)
   skin/classic/browser/search-indicator-badge-add@2x.png       (../shared/search/search-indicator-badge-add@2x.png)
   skin/classic/browser/search-history-icon.svg                 (../shared/search/history-icon.svg)
   skin/classic/browser/search-indicator-magnifying-glass.svg   (../shared/search/search-indicator-magnifying-glass.svg)
   skin/classic/browser/search-arrow-go.svg                     (../shared/search/search-arrow-go.svg)
-  skin/classic/browser/search-arrow-go-rtl.svg                 (../shared/search/search-arrow-go-rtl.svg)
   skin/classic/browser/gear.svg                                (../shared/search/gear.svg)
   skin/classic/browser/tabbrowser/connecting.png               (../shared/tabbrowser/connecting.png)
   skin/classic/browser/tabbrowser/connecting@2x.png            (../shared/tabbrowser/connecting@2x.png)
   skin/classic/browser/tabbrowser/crashed.svg                  (../shared/tabbrowser/crashed.svg)
   skin/classic/browser/tabbrowser/pendingpaint.png             (../shared/tabbrowser/pendingpaint.png)
   skin/classic/browser/tabbrowser/tab-audio.svg                (../shared/tabbrowser/tab-audio.svg)
   skin/classic/browser/tabbrowser/tab-audio-small.svg          (../shared/tabbrowser/tab-audio-small.svg)
   skin/classic/browser/tabbrowser/tab-overflow-indicator.png   (../shared/tabbrowser/tab-overflow-indicator.png)

deleted file mode 100644
--- a/browser/themes/shared/search/search-arrow-go-rtl.svg
+++ /dev/null
@@ -1,8 +0,0 @@
-<!-- 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">
-  <path fill="context-fill" d="M15,7V9.2C15,9.8,14.6,10,14,10H6.5L9.5,13.1C9.9,13.4,9.9,14.1,9.5,14.5L8.7,15.3C8.3,15.7,7.7,15.7,7.3,15.3L0.7,8.7C0.3,8.3,0.3,7.7,0.7,7.3L7.3,0.7C7.7,0.3,8.3,0.3,8.7,0.7L9.5,1.6C9.9,2,9.9,2.6,9.5,3L6.5,6H14C14.6,6,15,6.4,15,7Z"/>
-</svg>
-