--- a/browser/components/newtab/content-src/styles/_icons.scss
+++ b/browser/components/newtab/content-src/styles/_icons.scss
@@ -184,17 +184,17 @@
     }
   }
 
   &.icon-arrowhead-up {
     background-image: url('chrome://global/skin/icons/arrow-up.svg');
   }
 
   &.icon-add {
-    background-image: url('chrome://activity-stream/content/data/content/assets/glyph-add-16.svg');
+    background-image: url('chrome://global/skin/icons/plus.svg');
   }
 
   &.icon-minimize {
     background-image: url('chrome://activity-stream/content/data/content/assets/glyph-minimize-16.svg');
   }
 
   &.icon-maximize {
     background-image: url('chrome://activity-stream/content/data/content/assets/glyph-maximize-16.svg');

--- a/browser/components/newtab/css/activity-stream-linux.css
+++ b/browser/components/newtab/css/activity-stream-linux.css
@@ -341,17 +341,17 @@ body[lwt-newtab-brighttext] {
 }
 .icon.icon-arrowhead-forward-small:dir(rtl) {
   background-image: url("chrome://global/skin/icons/arrow-left-12.svg");
 }
 .icon.icon-arrowhead-up {
   background-image: url("chrome://global/skin/icons/arrow-up.svg");
 }
 .icon.icon-add {
-  background-image: url("chrome://activity-stream/content/data/content/assets/glyph-add-16.svg");
+  background-image: url("chrome://global/skin/icons/plus.svg");
 }
 .icon.icon-minimize {
   background-image: url("chrome://activity-stream/content/data/content/assets/glyph-minimize-16.svg");
 }
 .icon.icon-maximize {
   background-image: url("chrome://activity-stream/content/data/content/assets/glyph-maximize-16.svg");
 }
 .icon.icon-arrow {

--- a/browser/components/newtab/css/activity-stream-mac.css
+++ b/browser/components/newtab/css/activity-stream-mac.css
@@ -345,17 +345,17 @@ body[lwt-newtab-brighttext] {
 }
 .icon.icon-arrowhead-forward-small:dir(rtl) {
   background-image: url("chrome://global/skin/icons/arrow-left-12.svg");
 }
 .icon.icon-arrowhead-up {
   background-image: url("chrome://global/skin/icons/arrow-up.svg");
 }
 .icon.icon-add {
-  background-image: url("chrome://activity-stream/content/data/content/assets/glyph-add-16.svg");
+  background-image: url("chrome://global/skin/icons/plus.svg");
 }
 .icon.icon-minimize {
   background-image: url("chrome://activity-stream/content/data/content/assets/glyph-minimize-16.svg");
 }
 .icon.icon-maximize {
   background-image: url("chrome://activity-stream/content/data/content/assets/glyph-maximize-16.svg");
 }
 .icon.icon-arrow {

--- a/browser/components/newtab/css/activity-stream-windows.css
+++ b/browser/components/newtab/css/activity-stream-windows.css
@@ -341,17 +341,17 @@ body[lwt-newtab-brighttext] {
 }
 .icon.icon-arrowhead-forward-small:dir(rtl) {
   background-image: url("chrome://global/skin/icons/arrow-left-12.svg");
 }
 .icon.icon-arrowhead-up {
   background-image: url("chrome://global/skin/icons/arrow-up.svg");
 }
 .icon.icon-add {
-  background-image: url("chrome://activity-stream/content/data/content/assets/glyph-add-16.svg");
+  background-image: url("chrome://global/skin/icons/plus.svg");
 }
 .icon.icon-minimize {
   background-image: url("chrome://activity-stream/content/data/content/assets/glyph-minimize-16.svg");
 }
 .icon.icon-maximize {
   background-image: url("chrome://activity-stream/content/data/content/assets/glyph-maximize-16.svg");
 }
 .icon.icon-arrow {

deleted file mode 100644
--- a/browser/components/newtab/data/content/assets/glyph-add-16.svg
+++ /dev/null
@@ -1,6 +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" viewBox="0 0 16 16" width="16" height="16" fill="context-fill" fill-opacity="context-fill-opacity">
-  <path d="M8 9.75 8 14a.625.625 0 0 0 1.25 0l0-4.25.5-.5 4.25 0A.625.625 0 0 0 14 8L9.75 8l-.5-.5 0-4.25a.625.625 0 0 0-1.25 0L8 7.5l-.5.5-4.25 0a.625.625 0 0 0 0 1.25l4.137 0 .613.5z"/>
-</svg>

--- a/browser/components/touchbar/MacTouchBar.js
+++ b/browser/components/touchbar/MacTouchBar.js
@@ -115,17 +115,17 @@ var gBuiltInInputs = {
   Find: {
     title: "find",
     image: "chrome://global/skin/icons/search-glass.svg",
     type: kInputTypes.BUTTON,
     callback: () => execCommand("cmd_find"),
   },
   NewTab: {
     title: "new-tab",
-    image: "chrome://global/skin/icons/add.svg",
+    image: "chrome://global/skin/icons/plus.svg",
     type: kInputTypes.BUTTON,
     callback: () => execCommand("cmd_newNavigatorTabNoEvent"),
   },
   Sidebar: {
     title: "open-sidebar",
     image: "chrome://browser/skin/sidebars.svg",
     type: kInputTypes.BUTTON,
     callback: () => {

--- a/browser/installer/allowed-dupes.mn
+++ b/browser/installer/allowed-dupes.mn
@@ -113,16 +113,12 @@ chrome/toolkit/skin/classic/mozapps/exte
 chrome/toolkit/skin/classic/mozapps/extensions/extensionGeneric.svg
 chrome/toolkit/skin/classic/mozapps/extensions/themeGeneric.svg
 browser/chrome/browser/skin/classic/browser/customize.svg
 
 # Bug 1718144 - De-duplicate lightbulb icon
 browser/features/webcompat-reporter@mozilla.org/icons/lightbulb.svg
 chrome/toolkit/skin/classic/global/icons/lightbulb.svg
 
-# Bug 1700124 - De-duplicate browser/themes/shared icons
-browser/chrome/browser/content/activity-stream/data/content/assets/glyph-add-16.svg
-browser/chrome/browser/skin/classic/browser/zoom-in.svg
-
 # Bug 1710546 - Bundle Firefox extension as a builtin addon Nighly only
 # We plan to remove this duplicity after Firefox Translations become pref'd on
 browser/chrome/browser/builtin-addons/translations/wasm/cld-worker.js.mem
 browser/modules/translation/cld-worker.js.mem

--- a/browser/themes/osx/browser.css
+++ b/browser/themes/osx/browser.css
@@ -254,17 +254,17 @@ moz-input-box > menupopup .context-menu-
   fill: currentColor;
   fill-opacity: 0.8;
   border: none;
   padding: 0 9px;
   margin: 0;
   min-height: 24px;
   height: 24px;
   color: inherit;
-  list-style-image: url("chrome://global/skin/icons/add.svg");
+  list-style-image: url("chrome://global/skin/icons/plus.svg");
 }
 
 #editBMPanel_newFolderButton:hover {
   background-color: var(--arrowpanel-dimmed);
 }
 
 #editBMPanel_newFolderButton:hover:active {
   background-color: var(--arrowpanel-dimmed-further);

deleted file mode 100644
--- a/browser/themes/shared/icons/zoom-in.svg
+++ /dev/null
@@ -1,6 +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" viewBox="0 0 16 16" width="16" height="16" fill="context-fill" fill-opacity="context-fill-opacity">
-  <path d="M8 9.75 8 14a.625.625 0 0 0 1.25 0l0-4.25.5-.5 4.25 0A.625.625 0 0 0 14 8L9.75 8l-.5-.5 0-4.25a.625.625 0 0 0-1.25 0L8 7.5l-.5.5-4.25 0a.625.625 0 0 0 0 1.25l4.137 0 .613.5z"/>
-</svg>

--- a/browser/themes/shared/jar.inc.mn
+++ b/browser/themes/shared/jar.inc.mn
@@ -180,17 +180,16 @@
 #endif
   skin/classic/browser/stop-to-reload.svg             (../shared/icons/stop-to-reload.svg)
   skin/classic/browser/subtract-circle-fill.svg       (../shared/icons/subtract-circle-fill.svg)
   skin/classic/browser/success-animation.svg          (../shared/icons/success-animation.svg)
   skin/classic/browser/sync.svg                       (../shared/icons/sync.svg)
   skin/classic/browser/tab.svg                        (../shared/icons/tab.svg)
   skin/classic/browser/whatsnew.svg                   (../shared/icons/whatsnew.svg)
   skin/classic/browser/window.svg                     (../shared/icons/window.svg)
-  skin/classic/browser/zoom-in.svg                    (../shared/icons/zoom-in.svg)
   skin/classic/browser/zoom-out.svg                   (../shared/icons/zoom-out.svg)
   skin/classic/browser/ion.svg                        (../shared/icons/ion.svg)
 
 
   skin/classic/browser/search-engine-placeholder.png           (../shared/search/search-engine-placeholder.png)
   skin/classic/browser/search-engine-placeholder@2x.png        (../shared/search/search-engine-placeholder@2x.png)
   skin/classic/browser/search-indicator-badge-add.svg          (../shared/search/search-indicator-badge-add.svg)
 

--- a/browser/themes/shared/tabs.inc.css
+++ b/browser/themes/shared/tabs.inc.css
@@ -685,17 +685,17 @@
   fill: var(--toolbarbutton-icon-fill);
   fill-opacity: var(--toolbarbutton-icon-fill-opacity);
 }
 
 /* New tab button */
 
 #tabs-newtab-button,
 #TabsToolbar #new-tab-button {
-  list-style-image: url(chrome://global/skin/icons/add.svg);
+  list-style-image: url(chrome://global/skin/icons/plus.svg);
 }
 
 /* All tabs button and menupopup */
 
 #alltabs-button {
   list-style-image: url(chrome://global/skin/icons/arrow-down.svg);
 }
 

--- a/browser/themes/shared/toolbarbutton-icons.inc.css
+++ b/browser/themes/shared/toolbarbutton-icons.inc.css
@@ -330,17 +330,17 @@ toolbar[brighttext]:-moz-lwtheme {
   list-style-image: url("chrome://browser/skin/edit-paste.svg");
 }
 
 #zoom-out-button {
   list-style-image: url("chrome://browser/skin/zoom-out.svg");
 }
 
 #zoom-in-button {
-  list-style-image: url("chrome://browser/skin/zoom-in.svg");
+  list-style-image: url("chrome://global/skin/icons/plus.svg");
 }
 
 #zoom-in-button > .toolbarbutton-icon {
   /* This padding is used to center the icon */
   padding-inline-start: 7px;
 }
 
 #PlacesChevron,

--- a/toolkit/components/aboutconfig/content/aboutconfig.css
+++ b/toolkit/components/aboutconfig/content/aboutconfig.css
@@ -223,17 +223,17 @@ td.cell-value > form > input[type="numbe
   background-repeat: no-repeat;
   background-size: 16px;
   fill: currentColor;
   min-width: auto;
   width: 32px;
 }
 
 .button-add {
-  background-image: url("chrome://global/skin/icons/add.svg");
+  background-image: url("chrome://global/skin/icons/plus.svg");
 }
 
 .button-save {
   background-image: url("chrome://global/skin/icons/check.svg");
 }
 
 .button-edit {
   background-image: url("chrome://global/skin/icons/edit.svg");

rename from toolkit/themes/shared/icons/add.svg
rename to toolkit/themes/shared/icons/plus.svg

--- a/toolkit/themes/shared/jar.inc.mn
+++ b/toolkit/themes/shared/jar.inc.mn
@@ -25,17 +25,16 @@ toolkit.jar:
 * skin/classic/global/arrowscrollbox.css                   (../../shared/arrowscrollbox.css)
   skin/classic/global/close-icon.css                       (../../shared/close-icon.css)
   skin/classic/global/datetimeinputpickers.css             (../../shared/datetimeinputpickers.css)
   skin/classic/global/findbar.css                          (../../shared/findbar.css) 
   skin/classic/global/notification.css                     (../../shared/notification.css)
   skin/classic/global/numberinput.css                      (../../shared/numberinput.css)
   skin/classic/global/in-content/info-pages.css            (../../shared/in-content/info-pages.css)
   skin/classic/global/in-content/toggle-button.css         (../../shared/in-content/toggle-button.css)
-  skin/classic/global/icons/add.svg                        (../../shared/icons/add.svg)
   skin/classic/global/icons/arrow-left.svg                 (../../shared/icons/arrow-left.svg)
   skin/classic/global/icons/arrow-right.svg                (../../shared/icons/arrow-right.svg)
   skin/classic/global/icons/autoscroll.svg                 (../../shared/icons/autoscroll.svg)
   skin/classic/global/icons/autoscroll-horizontal.svg      (../../shared/icons/autoscroll-horizontal.svg)
   skin/classic/global/icons/autoscroll-vertical.svg        (../../shared/icons/autoscroll-vertical.svg)
   skin/classic/global/icons/blocked.svg                    (../../shared/icons/blocked.svg)
   skin/classic/global/icons/check.svg                      (../../shared/icons/check.svg)
   skin/classic/global/icons/check-partial.svg              (../../shared/icons/check-partial.svg)
@@ -58,16 +57,17 @@ toolkit.jar:
   skin/classic/global/icons/loading@2x.png                 (../../shared/icons/loading@2x.png)
   skin/classic/global/icons/more.svg                       (../../shared/icons/more.svg)
   skin/classic/global/icons/open-in-new.svg                (../../shared/icons/open-in-new.svg)
   skin/classic/global/icons/page-portrait.svg              (../../shared/icons/page-portrait.svg)
   skin/classic/global/icons/page-landscape.svg             (../../shared/icons/page-landscape.svg)
   skin/classic/global/icons/performance.svg                (../../shared/icons/performance.svg)
   skin/classic/global/icons/plugin.svg                     (../../shared/icons/plugin.svg)
   skin/classic/global/icons/plugin-blocked.svg             (../../shared/icons/plugin-blocked.svg)
+  skin/classic/global/icons/plus.svg                       (../../shared/icons/plus.svg)
   skin/classic/global/icons/pocket.svg                     (../../shared/icons/pocket.svg)
   skin/classic/global/icons/print.svg                      (../../shared/icons/print.svg)
   skin/classic/global/icons/undo.svg                       (../../shared/icons/undo.svg)
   skin/classic/global/icons/radio.svg                      (../../shared/icons/radio.svg)
   skin/classic/global/icons/resizer.svg                    (../../shared/icons/resizer.svg)
   skin/classic/global/icons/search-glass.svg               (../../shared/icons/search-glass.svg)
   skin/classic/global/icons/security.svg                   (../../shared/icons/security.svg)
   skin/classic/global/icons/security-broken.svg            (../../shared/icons/security-broken.svg)