diff --git a/chrome/browser/net/dns_probe_browsertest.cc b/chrome/browser/net/dns_probe_browsertest.cc
index 3e6ae2bb96a0d..2188ec1ca1868 100644
--- a/chrome/browser/net/dns_probe_browsertest.cc
+++ b/chrome/browser/net/dns_probe_browsertest.cc
@@ -209,7 +209,7 @@ void DnsProbeBrowserTest::SetUpOnMainThread() {
   NetErrorTabHelper::set_state_for_testing(NetErrorTabHelper::TESTING_DEFAULT);
 
   browser()->profile()->GetPrefs()->SetBoolean(
-      embedder_support::kAlternateErrorPagesEnabled, true);
+      embedder_support::kAlternateErrorPagesEnabled, false);
 
   ASSERT_TRUE(embedded_test_server()->Start());
 
diff --git a/chrome/browser/net/profile_network_context_service.cc b/chrome/browser/net/profile_network_context_service.cc
index dd097856a0245..e489fe95eec53 100644
--- a/chrome/browser/net/profile_network_context_service.cc
+++ b/chrome/browser/net/profile_network_context_service.cc
@@ -392,7 +392,7 @@ void ProfileNetworkContextService::UpdateAdditionalCertificates() {
 void ProfileNetworkContextService::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(
-      embedder_support::kAlternateErrorPagesEnabled, true,
+      embedder_support::kAlternateErrorPagesEnabled, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterBooleanPref(prefs::kQuicAllowed, true);
   registry->RegisterBooleanPref(prefs::kGloballyScopeHTTPAuthCacheEnabled,
diff --git a/weblayer/browser/browser_context_impl.cc b/weblayer/browser/browser_context_impl.cc
index dee3be0280b2d..53eb3f6edd3d5 100644
--- a/weblayer/browser/browser_context_impl.cc
+++ b/weblayer/browser/browser_context_impl.cc
@@ -291,7 +291,7 @@ void BrowserContextImpl::RegisterPrefs(
   // potential use cases in the future, as it is used for various purposes
   // through //chrome).
   pref_registry->RegisterBooleanPref(
-      embedder_support::kAlternateErrorPagesEnabled, true);
+      embedder_support::kAlternateErrorPagesEnabled, false);
   pref_registry->RegisterListPref(
       site_isolation::prefs::kUserTriggeredIsolatedOrigins);
   pref_registry->RegisterDictionaryPref(