diff --git a/patch/patch.cfg b/patch/patch.cfg
index 2aa6ca9ba..7e9816914 100644
--- a/patch/patch.cfg
+++ b/patch/patch.cfg
@@ -380,11 +380,14 @@ patches = [
     'name': 'build',
   },
   {
-    # Changes necessary to support for chrome extensions. Add a new
+    # Changes necessary to support chrome extensions. Add a new
     # ExtensionHost constructor that allows CEF to create the WebContents.
     # https://bitbucket.org/chromiumembedded/cef/issues/1947
     #
     # Don't initialize PrerenderContents object in StreamsPrivateAPI.
+    #
+    # Return nullptr from ExtensionsClient::Get and ExtensionRegistry::Get
+    # when extensions are disabled.
     'name': 'extensions_1947',
   },
   {
diff --git a/patch/patches/chrome_plugins.patch b/patch/patches/chrome_plugins.patch
index 8d776ed01..4715ab19a 100644
--- a/patch/patches/chrome_plugins.patch
+++ b/patch/patches/chrome_plugins.patch
@@ -1,129 +1,46 @@
 diff --git chrome/browser/plugins/plugin_info_host_impl.cc chrome/browser/plugins/plugin_info_host_impl.cc
-index 7ceb1d7b854d9..5efcb8c09058c 100644
+index 7ceb1d7b854d9..721026a5a4be1 100644
 --- chrome/browser/plugins/plugin_info_host_impl.cc
 +++ chrome/browser/plugins/plugin_info_host_impl.cc
-@@ -16,6 +16,7 @@
- #include "base/strings/utf_string_conversions.h"
- #include "build/branding_buildflags.h"
- #include "build/build_config.h"
-+#include "cef/libcef/features/runtime.h"
- #include "chrome/browser/browser_process.h"
- #include "chrome/browser/content_settings/host_content_settings_map_factory.h"
- #include "chrome/browser/plugins/chrome_plugin_service_filter.h"
-@@ -50,6 +51,10 @@
- #include "url/gurl.h"
- #include "url/origin.h"
- 
-+#if BUILDFLAG(ENABLE_CEF)
-+#include "cef/libcef/common/extensions/extensions_util.h"
-+#endif
-+
- #if BUILDFLAG(ENABLE_EXTENSIONS)
- #include "components/guest_view/browser/guest_view_base.h"
- #include "extensions/browser/extension_registry.h"
-@@ -135,6 +140,9 @@ bool IsPluginLoadingAccessibleResourceInWebView(
+@@ -135,6 +135,10 @@ bool IsPluginLoadingAccessibleResourceInWebView(
      extensions::ExtensionRegistry* extension_registry,
      int process_id,
      const GURL& resource) {
++  // May be nullptr if using CEF Alloy with extensions disabled.
 +  if (!extension_registry)
 +    return false;
 +
    extensions::WebViewRendererState* renderer_state =
        extensions::WebViewRendererState::GetInstance();
    std::string partition_id;
-@@ -163,14 +171,18 @@ bool IsPluginLoadingAccessibleResourceInWebView(
- 
- PluginInfoHostImpl::Context::Context(int render_process_id, Profile* profile)
-     : render_process_id_(render_process_id),
--#if BUILDFLAG(ENABLE_EXTENSIONS)
--      extension_registry_(extensions::ExtensionRegistry::Get(profile)),
--#endif
-       host_content_settings_map_(
-           HostContentSettingsMapFactory::GetForProfile(profile)),
-       plugin_prefs_(PluginPrefs::GetForProfile(profile)) {
-   allow_outdated_plugins_.Init(prefs::kPluginsAllowOutdated,
-                                profile->GetPrefs());
-+
-+#if BUILDFLAG(ENABLE_EXTENSIONS)
-+#if BUILDFLAG(ENABLE_CEF)
-+  if (!cef::IsAlloyRuntimeEnabled() || extensions::ExtensionsEnabled())
-+#endif
-+    extension_registry_ = extensions::ExtensionRegistry::Get(profile);
-+#endif
- }
- 
- PluginInfoHostImpl::Context::~Context() {}
 diff --git chrome/browser/plugins/plugin_utils.cc chrome/browser/plugins/plugin_utils.cc
-index 8b3f569882aeb..ae0c4aa9a0514 100644
+index 8b3f569882aeb..afc8007a6228b 100644
 --- chrome/browser/plugins/plugin_utils.cc
 +++ chrome/browser/plugins/plugin_utils.cc
-@@ -5,6 +5,7 @@
- #include "chrome/browser/plugins/plugin_utils.h"
- 
- #include "base/values.h"
-+#include "cef/libcef/features/runtime.h"
- #include "chrome/browser/profiles/profile.h"
- #include "components/content_settings/core/browser/host_content_settings_map.h"
- #include "components/content_settings/core/common/content_settings_types.h"
-@@ -14,6 +15,10 @@
- #include "url/gurl.h"
- #include "url/origin.h"
- 
-+#if BUILDFLAG(ENABLE_CEF)
-+#include "cef/libcef/common/extensions/extensions_util.h"
-+#endif
-+
- #if BUILDFLAG(ENABLE_EXTENSIONS)
- #include "chrome/browser/extensions/chrome_content_browser_client_extensions_part.h"
- #include "chrome/common/pref_names.h"
-@@ -69,6 +74,12 @@ base::flat_map<std::string, std::string>
- PluginUtils::GetMimeTypeToExtensionIdMap(
+@@ -70,6 +70,13 @@ PluginUtils::GetMimeTypeToExtensionIdMap(
      content::BrowserContext* browser_context) {
    base::flat_map<std::string, std::string> mime_type_to_extension_id_map;
-+
-+#if BUILDFLAG(ENABLE_CEF)
-+  if (cef::IsAlloyRuntimeEnabled() && !extensions::ExtensionsEnabled())
-+    return mime_type_to_extension_id_map;
-+#endif
-+
  #if BUILDFLAG(ENABLE_EXTENSIONS)
++  // May be nullptr if using CEF Alloy with extensions disabled.
++  extensions::ExtensionRegistry* registry =
++      extensions::ExtensionRegistry::Get(browser_context);
++  if (!registry) {
++    return mime_type_to_extension_id_map;
++  }
++
    Profile* profile = Profile::FromBrowserContext(browser_context);
    if (extensions::ChromeContentBrowserClientExtensionsPart::
-diff --git chrome/common/google_url_loader_throttle.cc chrome/common/google_url_loader_throttle.cc
-index a29a2739af3c8..0feb1a87cef64 100644
---- chrome/common/google_url_loader_throttle.cc
-+++ chrome/common/google_url_loader_throttle.cc
-@@ -7,6 +7,7 @@
- #include "base/feature_list.h"
- #include "base/metrics/histogram_functions.h"
- #include "build/build_config.h"
-+#include "cef/libcef/features/runtime.h"
- #include "chrome/common/chrome_features.h"
- #include "chrome/common/net/safe_search_util.h"
- #include "components/google/core/common/google_util.h"
-@@ -19,6 +20,10 @@
- #include "ui/base/device_form_factor.h"
- #endif
- 
-+#if BUILDFLAG(ENABLE_CEF)
-+#include "cef/libcef/common/extensions/extensions_util.h"
-+#endif
-+
- #if BUILDFLAG(ENABLE_EXTENSIONS)
- #include "extensions/common/extension_urls.h"
- #endif
-@@ -158,6 +163,11 @@ void GoogleURLLoaderThrottle::WillProcessResponse(
-     const GURL& response_url,
-     network::mojom::URLResponseHead* response_head,
-     bool* defer) {
-+#if BUILDFLAG(ENABLE_CEF)
-+  if (cef::IsAlloyRuntimeEnabled() && !extensions::ExtensionsEnabled())
-+    return;
-+#endif
-+
-   // Built-in additional protection for the chrome web store origin by ensuring
-   // that the X-Frame-Options protection mechanism is set to either DENY or
-   // SAMEORIGIN.
+           AreExtensionsDisabledForProfile(profile)) {
+@@ -80,9 +87,6 @@ PluginUtils::GetMimeTypeToExtensionIdMap(
+       MimeTypesHandler::GetMIMETypeAllowlist();
+   // Go through the allowed extensions and try to use them to intercept
+   // the URL request.
+-  extensions::ExtensionRegistry* registry =
+-      extensions::ExtensionRegistry::Get(browser_context);
+-  DCHECK(registry);
+   for (const std::string& extension_id : allowlist) {
+     const extensions::Extension* extension =
+         registry->enabled_extensions().GetByID(extension_id);
 diff --git chrome/renderer/chrome_content_renderer_client.cc chrome/renderer/chrome_content_renderer_client.cc
 index 3d08b706ec4a0..7f4a0398e51f9 100644
 --- chrome/renderer/chrome_content_renderer_client.cc
diff --git a/patch/patches/extensions_1947.patch b/patch/patches/extensions_1947.patch
index ea43e159c..474b97ca8 100644
--- a/patch/patches/extensions_1947.patch
+++ b/patch/patches/extensions_1947.patch
@@ -160,6 +160,37 @@ index 07be432f365b9..d3800886a5b5c 100644
  
    // A pointer to the current or speculative main frame in `host_contents_`. We
    // can't access this frame through the `host_contents_` directly as it does
+diff --git extensions/browser/extension_registry.cc extensions/browser/extension_registry.cc
+index 10d751cceab73..128af05925e07 100644
+--- extensions/browser/extension_registry.cc
++++ extensions/browser/extension_registry.cc
+@@ -6,9 +6,14 @@
+ 
+ #include "base/observer_list.h"
+ #include "base/strings/string_util.h"
++#include "cef/libcef/features/runtime.h"
+ #include "extensions/browser/extension_registry_factory.h"
+ #include "extensions/browser/extension_registry_observer.h"
+ 
++#if BUILDFLAG(ENABLE_CEF)
++#include "cef/libcef/common/extensions/extensions_util.h"
++#endif
++
+ namespace extensions {
+ 
+ ExtensionRegistry::ExtensionRegistry(content::BrowserContext* browser_context)
+@@ -17,6 +22,11 @@ ExtensionRegistry::~ExtensionRegistry() {}
+ 
+ // static
+ ExtensionRegistry* ExtensionRegistry::Get(content::BrowserContext* context) {
++#if BUILDFLAG(ENABLE_CEF)
++  if (cef::IsAlloyRuntimeEnabled() && !extensions::ExtensionsEnabled()) {
++    return nullptr;
++  }
++#endif
+   return ExtensionRegistryFactory::GetForBrowserContext(context);
+ }
+ 
 diff --git extensions/browser/extensions_browser_client.h extensions/browser/extensions_browser_client.h
 index 028d6b1fec3a0..0829a24eb2879 100644
 --- extensions/browser/extensions_browser_client.h
@@ -218,3 +249,16 @@ index aeee5f5a516c4..ca2079ba1b447 100644
    host->SetCloseHandler(
        base::BindOnce(&ProcessManager::HandleCloseExtensionHost,
                       weak_ptr_factory_.GetWeakPtr()));
+diff --git extensions/common/extensions_client.cc extensions/common/extensions_client.cc
+index 53ad0736cfbdf..c252591fa646d 100644
+--- extensions/common/extensions_client.cc
++++ extensions/common/extensions_client.cc
+@@ -23,7 +23,7 @@ ExtensionsClient* g_client = nullptr;
+ }  // namespace
+ 
+ ExtensionsClient* ExtensionsClient::Get() {
+-  DCHECK(g_client);
++  // May be nullptr if using CEF Alloy with extensions disabled.
+   return g_client;
+ }
+ 
diff --git a/patch/patches/services_network_2622.patch b/patch/patches/services_network_2622.patch
index 49fc618fc..dd2570671 100644
--- a/patch/patches/services_network_2622.patch
+++ b/patch/patches/services_network_2622.patch
@@ -1,5 +1,5 @@
 diff --git chrome/browser/net/profile_network_context_service.cc chrome/browser/net/profile_network_context_service.cc
-index 8221b46c59df3..56f9d584b3a50 100644
+index 8221b46c59df3..eca1b2040dd4c 100644
 --- chrome/browser/net/profile_network_context_service.cc
 +++ chrome/browser/net/profile_network_context_service.cc
 @@ -22,6 +22,7 @@
@@ -10,7 +10,18 @@ index 8221b46c59df3..56f9d584b3a50 100644
  #include "chrome/browser/browser_features.h"
  #include "chrome/browser/browser_process.h"
  #include "chrome/browser/chrome_content_browser_client.h"
-@@ -796,7 +797,19 @@ void ProfileNetworkContextService::ConfigureNetworkContextParamsInternal(
+@@ -304,7 +305,9 @@ ProfileNetworkContextService::ProfileNetworkContextService(Profile* profile)
+                           base::Unretained(this)));
+ 
+ #if BUILDFLAG(ENABLE_EXTENSIONS)
+-  registry_observation_.Observe(extensions::ExtensionRegistry::Get(profile_));
++  if (auto extension_registry = extensions::ExtensionRegistry::Get(profile_)) {
++    registry_observation_.Observe(extension_registry);
++  }
+ #endif
+ }
+ 
+@@ -796,7 +799,19 @@ void ProfileNetworkContextService::ConfigureNetworkContextParamsInternal(
  
    // Configure on-disk storage for non-OTR profiles. OTR profiles just use
    // default behavior (in memory storage, default sizes).
@@ -31,7 +42,7 @@ index 8221b46c59df3..56f9d584b3a50 100644
      PrefService* local_state = g_browser_process->local_state();
      // Configure the HTTP cache path and size.
      base::FilePath base_cache_path;
-@@ -809,7 +822,9 @@ void ProfileNetworkContextService::ConfigureNetworkContextParamsInternal(
+@@ -809,7 +824,9 @@ void ProfileNetworkContextService::ConfigureNetworkContextParamsInternal(
          base_cache_path.Append(chrome::kCacheDirname);
      network_context_params->http_cache_max_size =
          local_state->GetInteger(prefs::kDiskCacheSize);
diff --git a/patch/patches/webui_2037.patch b/patch/patches/webui_2037.patch
index 1a271185a..a44344baf 100644
--- a/patch/patches/webui_2037.patch
+++ b/patch/patches/webui_2037.patch
@@ -1,16 +1,8 @@
 diff --git chrome/browser/feedback/system_logs/log_sources/chrome_internal_log_source.cc chrome/browser/feedback/system_logs/log_sources/chrome_internal_log_source.cc
-index 0b3085d90332f..7b84c740aafc7 100644
+index 0b3085d90332f..4fe995a31d4e8 100644
 --- chrome/browser/feedback/system_logs/log_sources/chrome_internal_log_source.cc
 +++ chrome/browser/feedback/system_logs/log_sources/chrome_internal_log_source.cc
-@@ -10,6 +10,7 @@
- #include <vector>
- 
- #include "base/bind.h"
-+#include "base/command_line.h"
- #include "base/functional/callback_helpers.h"
- #include "base/json/json_string_value_serializer.h"
- #include "base/logging.h"
-@@ -19,16 +20,19 @@
+@@ -19,10 +19,12 @@
  #include "base/strings/stringprintf.h"
  #include "base/system/sys_info.h"
  #include "base/task/thread_pool.h"
@@ -23,14 +15,7 @@ index 0b3085d90332f..7b84c740aafc7 100644
  #include "chrome/browser/browser_process.h"
  #include "chrome/browser/extensions/chrome_content_browser_client_extensions_part.h"
  #include "chrome/browser/google/google_brand.h"
- #include "chrome/browser/profiles/profile_manager.h"
- #include "chrome/browser/sync/sync_service_factory.h"
- #include "chrome/common/channel_info.h"
-+#include "chrome/common/chrome_switches.h"
- #include "chromeos/ash/components/dbus/spaced/spaced_client.h"
- #include "components/feedback/system_logs/system_logs_source.h"
- #include "components/prefs/pref_service.h"
-@@ -398,7 +402,11 @@ void ChromeInternalLogSource::Fetch(SysLogsSourceCallback callback) {
+@@ -398,7 +400,11 @@ void ChromeInternalLogSource::Fetch(SysLogsSourceCallback callback) {
    response->emplace(kOsVersionTag, os_version);
  #endif
  
@@ -43,20 +28,20 @@ index 0b3085d90332f..7b84c740aafc7 100644
    PopulateExtensionInfoLogs(response.get());
    PopulatePowerApiLogs(response.get());
  #if BUILDFLAG(IS_WIN)
-@@ -472,6 +480,12 @@ void ChromeInternalLogSource::PopulateExtensionInfoLogs(
+@@ -472,8 +478,12 @@ void ChromeInternalLogSource::PopulateExtensionInfoLogs(
    if (!profile)
      return;
  
-+  // CEF should avoid accessing ExtensionRegistry when extensions are disabled.
-+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-+      switches::kDisableExtensions)) {
-+    return;
-+  }
-+
++  // May be nullptr if using CEF Alloy with extensions disabled.
    extensions::ExtensionRegistry* extension_registry =
        extensions::ExtensionRegistry::Get(profile);
++  if (!extension_registry)
++    return;
++
    std::string extensions_list;
-@@ -577,6 +591,8 @@ void ChromeInternalLogSource::PopulateOnboardingTime(
+   for (const scoped_refptr<const extensions::Extension>& extension :
+        extension_registry->enabled_extensions()) {
+@@ -577,6 +587,8 @@ void ChromeInternalLogSource::PopulateOnboardingTime(
  #if BUILDFLAG(IS_WIN)
  void ChromeInternalLogSource::PopulateUsbKeyboardDetected(
      SystemLogsResponse* response) {
@@ -66,33 +51,26 @@ index 0b3085d90332f..7b84c740aafc7 100644
    bool result =
        base::win::IsKeyboardPresentOnSlate(ui::GetHiddenWindow(), &reason);
 diff --git chrome/browser/memory_details.cc chrome/browser/memory_details.cc
-index d071ef696f441..441514f66150c 100644
+index d071ef696f441..aba280943251a 100644
 --- chrome/browser/memory_details.cc
 +++ chrome/browser/memory_details.cc
-@@ -8,6 +8,7 @@
- #include <set>
- 
- #include "base/bind.h"
-+#include "base/command_line.h"
- #include "base/containers/adapters.h"
- #include "base/containers/cxx20_erase.h"
- #include "base/file_version_info.h"
-@@ -18,6 +19,7 @@
- #include "base/task/thread_pool.h"
- #include "build/build_config.h"
- #include "chrome/browser/profiles/profile.h"
-+#include "chrome/common/chrome_switches.h"
- #include "components/nacl/common/nacl_process_type.h"
- #include "components/strings/grit/components_strings.h"
- #include "content/public/browser/browser_child_process_host_iterator.h"
-@@ -291,7 +293,9 @@ void MemoryDetails::CollectChildInfoOnUIThread() {
-     // Determine if this is an extension process.
-     bool process_is_for_extensions = false;
-     const extensions::ExtensionSet* extension_set = nullptr;
--    if (render_process_host) {
-+    if (render_process_host &&
-+        !base::CommandLine::ForCurrentProcess()->HasSwitch(
-+            switches::kDisableExtensions)) {
+@@ -294,8 +294,11 @@ void MemoryDetails::CollectChildInfoOnUIThread() {
+     if (render_process_host) {
        content::BrowserContext* context =
            render_process_host->GetBrowserContext();
++
++      // May be nullptr if using CEF Alloy with extensions disabled.
        extensions::ExtensionRegistry* extension_registry =
+           extensions::ExtensionRegistry::Get(context);
++      if (extension_registry) {
+       extension_set = &extension_registry->enabled_extensions();
+       extensions::ProcessMap* process_map =
+           extensions::ProcessMap::Get(context);
+@@ -311,6 +314,7 @@ void MemoryDetails::CollectChildInfoOnUIThread() {
+           break;
+         }
+       }
++      }
+     }
+ #endif
+