diff --git a/BUILD.gn b/BUILD.gn
index ba04c669a50..2a93b2a90e5 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -767,24 +767,34 @@ if (is_redirect_cc_build) {
 }
 if (is_win && enable_resource_allowlist_generation) {
   # Merge chrome_resource_allowlist and wireguard resources allowlist to keep
-  # wireguard resources in pak files.
-  action("merge_allowlists") {
-    deps = [
-      "//brave/browser/brave_vpn/win/brave_vpn_wireguard_service:wireguard_resource_allowlist",
-      "//chrome:resource_allowlist",
-    ]
+  # wireguard resources in pak files. When VPN is disabled, just copy the chrome
+  # allowlist.
+  if (enable_brave_vpn) {
+    action("merge_allowlists") {
+      deps = [
+        "//brave/browser/brave_vpn/win/brave_vpn_wireguard_service:wireguard_resource_allowlist",
+        "//chrome:resource_allowlist",
+      ]
 
-    script = "//brave//resources/brave_allowlist.py"
-    source_allowlist = "$root_gen_dir/chrome/chrome_resource_allowlist.txt"
-    args = [
-      "--repack_allowlist",
-      rebase_path(source_allowlist, root_build_dir),
-      "--brave_allowlist",
-      rebase_path(wireguard_resource_allowlist_file, root_build_dir),
-      "--output",
-      rebase_path(brave_allowlist_file, root_build_dir),
-    ]
+      script = "//brave//resources/brave_allowlist.py"
+      source_allowlist = "$root_gen_dir/chrome/chrome_resource_allowlist.txt"
+      args = [
+        "--repack_allowlist",
+        rebase_path(source_allowlist, root_build_dir),
+        "--brave_allowlist",
+        rebase_path(wireguard_resource_allowlist_file, root_build_dir),
+        "--output",
+        rebase_path(brave_allowlist_file, root_build_dir),
+      ]
 
-    outputs = [ brave_allowlist_file ]
+      outputs = [ brave_allowlist_file ]
+    }
+  } else {
+    # When VPN is disabled, just copy the chrome resource allowlist.
+    copy("merge_allowlists") {
+      deps = [ "//chrome:resource_allowlist" ]
+      sources = [ "$root_gen_dir/chrome/chrome_resource_allowlist.txt" ]
+      outputs = [ brave_allowlist_file ]
+    }
   }
 }
diff --git a/build/commands/lib/branding.js b/build/commands/lib/branding.js
index 1cdc0756aec..28937dc16e6 100644
--- a/build/commands/lib/branding.js
+++ b/build/commands/lib/branding.js
@@ -164,26 +164,26 @@ exports.update = () => {
       path.join(braveAppVectorIconsDir, 'vector_icons', branding),
       path.join(chromeComponentsDir, 'vector_icons', branding),
     ])
-  }
 
-  // Copy to make our ${branding_path_product}_behaviors.cc
-  fileMap.add([
-    path.join(
-      config.braveCoreDir,
-      'chromium_src',
-      'chrome',
-      'installer',
-      'setup',
-      'brave_behaviors.cc',
-    ),
-    path.join(
-      config.srcDir,
-      'chrome',
-      'installer',
-      'setup',
-      'brave_behaviors.cc',
-    ),
-  ])
+    // Copy to make our ${branding_path_product}_behaviors.cc
+    fileMap.add([
+      path.join(
+        config.braveCoreDir,
+        'chromium_src',
+        'chrome',
+        'installer',
+        'setup',
+        `${branding}_behaviors.cc`,
+      ),
+      path.join(
+        config.srcDir,
+        'chrome',
+        'installer',
+        'setup',
+        `${branding}_behaviors.cc`,
+      ),
+    ])
+  }
   // Replace webui CSS to use our fonts.
   fileMap.add([
     path.join(
diff --git a/chromium_src/check_chromium_src_config.json5 b/chromium_src/check_chromium_src_config.json5
index 6934614a675..6343f162e4b 100644
--- a/chromium_src/check_chromium_src_config.json5
+++ b/chromium_src/check_chromium_src_config.json5
@@ -29,6 +29,7 @@
         "chrome/common/chrome_constants_unittest_mac.cc",
         "chrome/installer/mini_installer/brave_mini_installer_unittest.cc",
         "chrome/installer/setup/brave_behaviors.cc",
+        "chrome/installer/setup/brave_origin_behaviors.cc",
         "chrome/installer/setup/test/install_worker_vpn_unittest.cc",
         "chrome/install_static/brave_install_details_unittest.cc",
         "chrome/install_static/brave_install_modes_unittest.cc",
diff --git a/chromium_src/chrome/installer/setup/brave_origin_behaviors.cc b/chromium_src/chrome/installer/setup/brave_origin_behaviors.cc
new file mode 100644
index 00000000000..440246c830e
--- /dev/null
+++ b/chromium_src/chrome/installer/setup/brave_origin_behaviors.cc
@@ -0,0 +1,7 @@
+/* Copyright (c) 2026 The Brave Authors. All rights reserved.
+ * 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 https://mozilla.org/MPL/2.0/. */
+
+// Brave Origin uses the same installer behaviors as Brave.
+#include "brave_behaviors.cc"