diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index 8fc02fd2b802..b428fe9b0989 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -2097,6 +2097,9 @@ pref("sidebar.revamp.round-content-area", false);
 pref("sidebar.animation.enabled", true);
 pref("sidebar.animation.duration-ms", 200);
 pref("sidebar.animation.expand-on-hover.duration-ms", 400);
+// The sidebar.main.tools pref cannot be changed.
+// Use the sidebar.newTool.migration. pref branch to introduce a new "tool" to the sidebar launcher;
+// see https://firefox-source-docs.mozilla.org/browser/components/sidebar/docs/index.html for instructions.
 pref("sidebar.main.tools", "aichat,syncedtabs,history");
 pref("sidebar.verticalTabs", false);
 pref("sidebar.visibility", "always-show");
diff --git a/browser/components/sidebar/SidebarManager.sys.mjs b/browser/components/sidebar/SidebarManager.sys.mjs
index b6f919046e81..5649c3cfa6da 100644
--- a/browser/components/sidebar/SidebarManager.sys.mjs
+++ b/browser/components/sidebar/SidebarManager.sys.mjs
@@ -7,6 +7,7 @@ import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
 
 const BACKUP_STATE_PREF = "sidebar.backupState";
 const VISIBILITY_SETTING_PREF = "sidebar.visibility";
+const SIDEBAR_TOOLS = "sidebar.main.tools";
 
 const lazy = {};
 ChromeUtils.defineESModuleGetters(lazy, {
@@ -31,6 +32,16 @@ XPCOMUtils.defineLazyPreferenceGetter(
   }
 );
 
+XPCOMUtils.defineLazyPreferenceGetter(
+  lazy,
+  "sidebarRevampEnabled",
+  "sidebar.revamp",
+  false,
+  () => SidebarManager.updateDefaultTools()
+);
+
+XPCOMUtils.defineLazyPreferenceGetter(lazy, "sidebarTools", SIDEBAR_TOOLS);
+
 export const SidebarManager = {
   /**
    * Handle startup tasks like telemetry, adding listeners.
@@ -78,6 +89,12 @@ export const SidebarManager = {
       );
     });
 
+    Services.prefs.addObserver(
+      "sidebar.newTool.migration.",
+      this.updateDefaultTools.bind(this)
+    );
+    this.updateDefaultTools();
+
     // if there's no user visibility pref, we may need to update it to the default value for the tab orientation
     const shouldResetVisibility = !Services.prefs.prefHasUserValue(
       VISIBILITY_SETTING_PREF
@@ -101,6 +118,55 @@ export const SidebarManager = {
     }
   },
 
+  /**
+   * Appends any new tools defined on the sidebar.newTool.migration pref branch
+   * to the sidebar.main.tools pref one time as a way of introducing a new tool
+   * to the launcher without overwriting what a user had previously customized.
+   */
+  updateDefaultTools() {
+    if (!lazy.sidebarRevampEnabled) {
+      return;
+    }
+
+    let tools = lazy.sidebarTools;
+    for (const pref of Services.prefs.getChildList(
+      "sidebar.newTool.migration."
+    )) {
+      try {
+        let options = JSON.parse(Services.prefs.getStringPref(pref));
+        let newTool = pref.split(".")[3];
+
+        // ensure we only add this tool once
+        if (options?.alreadyShown || lazy.sidebarTools.includes(newTool)) {
+          continue;
+        }
+
+        if (options?.visibilityPref) {
+          // Will only add the tool to the launcher if the panel governing a panels sidebar visibility
+          // is first enabled
+          let visibilityPrefValue = Services.prefs.getBoolPref(
+            options.visibilityPref
+          );
+          if (!visibilityPrefValue) {
+            Services.prefs.addObserver(
+              options.visibilityPref,
+              this.updateDefaultTools.bind(this)
+            );
+            continue;
+          }
+        }
+        tools = tools + "," + newTool;
+        options.alreadyShown = true;
+        Services.prefs.setStringPref(pref, JSON.stringify(options));
+      } catch (ex) {
+        console.error("Failed to handle pref " + pref, ex);
+      }
+    }
+    if (tools.length > lazy.sidebarTools.length) {
+      Services.prefs.setStringPref(SIDEBAR_TOOLS, tools);
+    }
+  },
+
   /**
    * Provide a system-level "backup" state to be stored for those using "Never
    * remember history" or "Clear history when browser closes".
diff --git a/browser/components/sidebar/docs/index.rst b/browser/components/sidebar/docs/index.rst
new file mode 100644
index 000000000000..3919f65be38a
--- /dev/null
+++ b/browser/components/sidebar/docs/index.rst
@@ -0,0 +1,20 @@
+.. _components/sidebar:
+
+=========
+Sidebar
+=========
+
+The new sidebar builds on existing legacy sidebar code treating ``browser-sidebar.js`` as a `SidebarController`. As part of the new sidebar and vertical tabs project, we've added new components including top-level system module `SidebarManager.sys.mjs` and a per window state manager, `SidebarState.sys.ms`. We've added new UI components that use a combination of moz components and custom lit components. The sidebar team maintains the existing synced tabs and history panels.
+
+Introducing a new panel
+~~~~~~~~~~~~~~~~~~~~~~~
+
+Every panel that is registered and enabled in ``browser-sidebar.js``` and the ```defaultTools``` map will show as an option in the Customize Sidebar menu (which is a sidebar panel that contains settings).
+
+The launcher is a container for tools (ie, icons that when clicked open or close the associated panel). Registering a panel - which should be behind a pref until it is ready to be introduced - does not automatically add a new icon to the launcher.
+
+A tool can be added once for all users by adding it to the designated pref branch ``sidebar.newTool.migration.`` in ``profile/firefox.js``. So an example would be ``pref("sidebar.newTool.migration.bookmarks", '{}')``.  The pref suffix (``bookmarks`` in this example) is the ``toolID`` that should match what you added as the value portion of the relevant entry in the ``defaultTools`` map in ``browser-sidebar.js``. It's important to note that if you have a pref governing the visibility of your sidebar panel, it will need to be enabled at the same time in order to be shown in a user's launcher - either via a nimbus rollout or in-tree.
+
+If you only want to add this item if the pref governing visibility is true, you can pass the pref you want to observe, e.g. ``pref("sidebar.newTool.migration.reviewchecker", '{ "visibilityPref": "browser.shopping.experience2023.integratedSidebar"}')`` where ``browser.shopping.experience2023.integratedSidebar`` is the pref controlling the visibility of the review checker panel.
+
+In both cases, the tool will be introduced to the launcher one time (appended to a user's customized list of tools) and any customization after that (ie, removing it) takes precedence. If it's not removed, it will persist after that session.
diff --git a/browser/components/sidebar/moz.build b/browser/components/sidebar/moz.build
index c791205b91b9..30e18ba61950 100644
--- a/browser/components/sidebar/moz.build
+++ b/browser/components/sidebar/moz.build
@@ -16,3 +16,5 @@ EXTRA_JS_MODULES += [
 ]
 
 XPCSHELL_TESTS_MANIFESTS += ["tests/unit/xpcshell.toml"]
+
+SPHINX_TREES["docs"] = "docs"
diff --git a/browser/components/sidebar/tests/browser/browser.toml b/browser/components/sidebar/tests/browser/browser.toml
index 53b5c8205fdb..dee29fd59c3a 100644
--- a/browser/components/sidebar/tests/browser/browser.toml
+++ b/browser/components/sidebar/tests/browser/browser.toml
@@ -73,6 +73,8 @@ skip-if = [
   "os == 'win' && os_version == '11.26100' && opt", # Bug 1898739
 ]
 
+["browser_tools_migration.js"]
+
 ["browser_tools_overflow.js"]
 
 ["browser_verticalTabs_widget_placements.js"]
diff --git a/browser/components/sidebar/tests/browser/browser_tools_migration.js b/browser/components/sidebar/tests/browser/browser_tools_migration.js
new file mode 100644
index 000000000000..4d2810deb912
--- /dev/null
+++ b/browser/components/sidebar/tests/browser/browser_tools_migration.js
@@ -0,0 +1,124 @@
+/* Any copyright is dedicated to the Public Domain.
+   https://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_setup(async () => {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["sidebar.main.tools", "syncedtabs,history"],
+      ["sidebar.newTool.migration.bookmarks", "{}"],
+      ["browser.ml.chat.enabled", false],
+      [
+        "sidebar.newTool.migration.aichat",
+        JSON.stringify({
+          visibilityPref: "browser.ml.chat.enabled",
+        }),
+      ],
+    ],
+  });
+});
+
+add_task(async function test_one_time_tool_migration() {
+  const sidebar = document.querySelector("sidebar-main");
+  let tools = Services.prefs.getStringPref("sidebar.main.tools");
+  is(
+    tools.split(",").length,
+    3,
+    "Three tools are in the sidebar.main.tools pref"
+  );
+  is(
+    sidebar.toolButtons.length,
+    3,
+    "Three default tools are visible in the launcher"
+  );
+
+  await toggleSidebarPanel(window, "viewCustomizeSidebar");
+  let customizeDocument = window.SidebarController.browser.contentDocument;
+  const customizeComponent =
+    customizeDocument.querySelector("sidebar-customize");
+  let bookmarksInput = Array.from(customizeComponent.toolInputs).find(
+    input => input.name === "viewBookmarksSidebar"
+  );
+  ok(
+    bookmarksInput.checked,
+    "The bookmarks input is checked in the Customize Sidebar menu."
+  );
+  let prefValue = JSON.parse(
+    Services.prefs.getStringPref("sidebar.newTool.migration.bookmarks")
+  );
+  bookmarksInput.click();
+
+  await BrowserTestUtils.waitForMutationCondition(
+    bookmarksInput,
+    { attributes: true, attributeFilter: ["checked"] },
+    () => !bookmarksInput.checked
+  );
+
+  ok(
+    prefValue.alreadyShown,
+    "Pref property has been updated after being added to tools."
+  );
+
+  is(sidebar.toolButtons.length, 2, "Two tools are now shown in the launcher");
+});
+
+add_task(async function test_check_visibility_enabled() {
+  const sidebar = document.querySelector("sidebar-main");
+  let tools = Services.prefs.getStringPref("sidebar.main.tools");
+  is(
+    tools.split(",").length,
+    2,
+    "Two tools are in the sidebar.main.tools pref"
+  );
+
+  is(sidebar.toolButtons.length, 2, "Two tools are shown in the launcher");
+
+  let prefValue = JSON.parse(
+    Services.prefs.getStringPref("sidebar.newTool.migration.aichat")
+  );
+
+  ok(!prefValue.alreadyShown, "aichat pref property was not already shown.");
+
+  // enable aichat panel visibility
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.ml.chat.enabled", true]],
+  });
+
+  let customizeDocument = window.SidebarController.browser.contentDocument;
+  const customizeComponent =
+    customizeDocument.querySelector("sidebar-customize");
+
+  let aichatInput = Array.from(customizeComponent.toolInputs).find(
+    input => input.name === "viewGenaiChatSidebar"
+  );
+
+  await BrowserTestUtils.waitForMutationCondition(
+    aichatInput,
+    { attributes: true, attributeFilter: ["checked"] },
+    () => aichatInput.checked
+  );
+
+  let bookmarksInput = Array.from(customizeComponent.toolInputs).find(
+    input => input.name === "viewBookmarksSidebar"
+  );
+  ok(
+    !bookmarksInput.checked,
+    "The bookmarks input is not checked in the Customize Sidebar menu."
+  );
+
+  is(
+    sidebar.toolButtons.length,
+    3,
+    "Three tools are now shown in the launcher"
+  );
+
+  prefValue = JSON.parse(
+    Services.prefs.getStringPref("sidebar.newTool.migration.aichat")
+  );
+
+  ok(
+    prefValue.alreadyShown,
+    "aichat pref property is now marked as already shown."
+  );
+});
diff --git a/browser/docs/index.rst b/browser/docs/index.rst
index 64b6dc3c942a..1736bb4ebd13 100644
--- a/browser/docs/index.rst
+++ b/browser/docs/index.rst
@@ -37,3 +37,4 @@ This is the nascent documentation of the Firefox front-end code.
    /toolkit/themes/shared/design-system/docs/README.design-tokens.stories
    /toolkit/themes/shared/design-system/docs/README.json-design-tokens.stories
    components/backup/docs/index
+   components/sidebar/docs/index