diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index f302208534859..cb8a20a4cbae6 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -710,9 +710,6 @@ pref("browser.download.clearHistoryOnDelete", 0);
 pref("browser.helperApps.showOpenOptionForPdfJS", true);
 pref("browser.helperApps.showOpenOptionForViewableInternally", true);
 
-// search engine removal URL
-pref("browser.search.searchEngineRemoval", "https://support.mozilla.org/1/firefox/%VERSION%/%OS%/%LOCALE%/search-engine-removal");
-
 // search engines URL
 pref("browser.search.searchEnginesURL",      "https://addons.mozilla.org/%LOCALE%/firefox/search-engines/");
 
diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index a0b76fbe0402f..ad99735fab609 100644
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -4290,26 +4290,8 @@ const BrowserSearch = {
    * @param {string} newEngine
    *   name of the application default engine to replaced the removed engine.
    */
-  removalOfSearchEngineNotificationBox(oldEngine, newEngine) {
-    let messageFragment = document.createDocumentFragment();
-    let message = document.createElement("span");
-    let link = document.createXULElement("label", {
-      is: "text-link",
-    });
-
-    link.href = Services.urlFormatter.formatURLPref(
-      "browser.search.searchEngineRemoval"
-    );
-    link.setAttribute("data-l10n-name", "remove-search-engine-article");
-    document.l10n.setAttributes(message, "removed-search-engine-message", {
-      oldEngine,
-      newEngine,
-    });
-
-    message.appendChild(link);
-    messageFragment.appendChild(message);
-
-    let button = [
+  async removalOfSearchEngineNotificationBox(oldEngine, newEngine) {
+    let buttons = [
       {
         "l10n-id": "remove-search-engine-button",
         primary: true,
@@ -4320,15 +4302,21 @@ const BrowserSearch = {
           gNotificationBox.removeNotification(notificationBox);
         },
       },
+      {
+        supportPage: "search-engine-removal",
+      },
     ];
 
-    gNotificationBox.appendNotification(
+    await gNotificationBox.appendNotification(
       "search-engine-removal",
       {
-        label: messageFragment,
+        label: {
+          "l10n-id": "removed-search-engine-message2",
+          "l10n-args": { oldEngine, newEngine },
+        },
         priority: gNotificationBox.PRIORITY_SYSTEM,
       },
-      button
+      buttons
     );
 
     // Update engine name in the placeholder to the new default engine name.
diff --git a/browser/components/urlbar/tests/browser/browser_placeholder.js b/browser/components/urlbar/tests/browser/browser_placeholder.js
index fbf0a5007c62a..e096c6fdf648d 100644
--- a/browser/components/urlbar/tests/browser/browser_placeholder.js
+++ b/browser/components/urlbar/tests/browser/browser_placeholder.js
@@ -360,7 +360,7 @@ add_task(async function test_change_default_engine_updates_placeholder() {
   );
 
   info("Show search engine removal info bar");
-  BrowserSearch.removalOfSearchEngineNotificationBox(
+  await BrowserSearch.removalOfSearchEngineNotificationBox(
     extraEngine.name,
     originalEngine.name
   );
diff --git a/browser/locales/en-US/browser/search.ftl b/browser/locales/en-US/browser/search.ftl
index 327afa3443968..c6f3e8cde3315 100644
--- a/browser/locales/en-US/browser/search.ftl
+++ b/browser/locales/en-US/browser/search.ftl
@@ -34,5 +34,5 @@ searchbar-icon =
 ## $oldEngine (String) - the search engine to be removed.
 ## $newEngine (String) - the search engine to replace the removed search engine.
 
-removed-search-engine-message = <strong>Your default search engine has been changed.</strong> { $oldEngine } is no longer available as a default search engine in { -brand-short-name }. { $newEngine } is now your default search engine. To change to another default search engine, go to settings. <label data-l10n-name="remove-search-engine-article">Learn more</label>
+removed-search-engine-message2 = <strong>Your default search engine has been changed.</strong> { $oldEngine } is no longer available as a default search engine in { -brand-short-name }. { $newEngine } is now your default search engine. To change to another default search engine, go to settings.
 remove-search-engine-button = OK
diff --git a/python/l10n/fluent_migrations/bug_1845150_search_engine_notification.py b/python/l10n/fluent_migrations/bug_1845150_search_engine_notification.py
new file mode 100644
index 0000000000000..125baa4c1fbe6
--- /dev/null
+++ b/python/l10n/fluent_migrations/bug_1845150_search_engine_notification.py
@@ -0,0 +1,32 @@
+# Any copyright is dedicated to the Public Domain.
+# http://creativecommons.org/publicdomain/zero/1.0/
+
+import re
+import fluent.syntax.ast as FTL
+from fluent.migrate.transforms import TransformPattern
+
+
+class STRIP_LABEL(TransformPattern):
+    # Used to remove `<label data-l10n-name="remove-search-engine-article">` from a string
+    def visit_TextElement(self, node):
+        node.value = re.sub(
+            '\s?<label data-l10n-name="remove-search-engine-article">.+?</label>\s?',
+            "",
+            node.value,
+        )
+        return node
+
+
+def migrate(ctx):
+    """Bug 1845150 - Use moz-message-bar instead of message-bar in notificationbox.js, part {index}."""
+    search_ftl = "browser/browser/search.ftl"
+    ctx.add_transforms(
+        search_ftl,
+        search_ftl,
+        [
+            FTL.Message(
+                id=FTL.Identifier("removed-search-engine-message2"),
+                value=STRIP_LABEL(search_ftl, "removed-search-engine-message"),
+            ),
+        ],
+    )