diff --git a/libcef/browser/alloy/alloy_content_browser_client.cc b/libcef/browser/alloy/alloy_content_browser_client.cc
index 7506570a10fbd6d89caa2edaa3753419bbff476f..fee0d8e5b56b4b5d030f140ea8ae150738bfa916 100644
--- a/libcef/browser/alloy/alloy_content_browser_client.cc
+++ b/libcef/browser/alloy/alloy_content_browser_client.cc
@@ -3052,14 +3052,19 @@ static bool GetLockdownModeStatus() {
   return system_properties_adapter.GetLockdownModeStatus();
 }
 
+bool IsMultipleRenderProcess() {
+  return (*base::CommandLite::ForCurrentProcess())
+              .HasSwitch(switches::kForBrowser);
+}
+
 bool AlloyContentBrowserClient::ShouldDisableSiteIsolation(
     content::SiteIsolationMode site_isolation_mode) {
-  if (base::ohos::IsPcDevice()) {
+  if (base::ohos::IsPcDevice() || base::ohos::IsTabletDevice()) {
     return site_isolation::SiteIsolationPolicy::
         ShouldDisableSiteIsolationDueToMemoryThreshold(site_isolation_mode);
   } else {
     bool isLockdownModeEnabled = GetLockdownModeStatus();
-    if(isLockdownModeEnabled) {
+    if(isLockdownModeEnabled && IsMultipleRenderProcess()) {
       return site_isolation::SiteIsolationPolicy::
           ShouldDisableSiteIsolationDueToMemoryThreshold(site_isolation_mode);
     } else {