diff --git a/DEPS b/DEPS
index cd9ac4312245..d075ae467e72 100644
--- a/DEPS
+++ b/DEPS
@@ -2,7 +2,7 @@ gclient_gn_args_from = 'src'
 
 vars = {
   'chromium_version':
-    '140.0.7339.2',
+    '140.0.7339.16',
   'node_version':
     'v22.18.0',
   'nan_version':
diff --git a/docs/api/environment-variables.md b/docs/api/environment-variables.md
index cbd3525d03e1..f6b05c4cf85c 100644
--- a/docs/api/environment-variables.md
+++ b/docs/api/environment-variables.md
@@ -125,16 +125,6 @@ Options:
 * `kioclient5`
 * `kioclient`
 
-### `ELECTRON_OZONE_PLATFORM_HINT` _Linux_ _Deprecated_
-
-Selects the preferred platform backend used on Linux. `auto` selects Wayland if possible, X11 otherwise.
-
-Options:
-
-* `auto` (Default)
-* `wayland`
-* `x11`
-
 ## Development Variables
 
 The following environment variables are intended primarily for development and
diff --git a/docs/breaking-changes.md b/docs/breaking-changes.md
index b61f2d9576b6..05e8bec2f144 100644
--- a/docs/breaking-changes.md
+++ b/docs/breaking-changes.md
@@ -14,14 +14,12 @@ This document uses the following convention to categorize breaking changes:
 
 ## Planned Breaking API Changes (38.0)
 
-### Deprecated: `ELECTRON_OZONE_PLATFORM_HINT` environment variable
+### Removed: `ELECTRON_OZONE_PLATFORM_HINT` environment variable
 
 The default value of the `--ozone-plaftform` flag [changed to `auto`](https://chromium-review.googlesource.com/c/chromium/src/+/6775426).
 
 You should use the `XDG_SESSION_TYPE=wayland` environment variable instead to use Wayland.
 
-This environment variable will be [removed soon](https://chromium-review.googlesource.com/c/chromium/src/+/6819616).
-
 ### Removed: macOS 11 support
 
 macOS 11 (Big Sur) is no longer supported by [Chromium](https://chromium-review.googlesource.com/c/chromium/src/+/6594615).
diff --git a/filenames.gni b/filenames.gni
index 60b06800b24d..488058008c20 100644
--- a/filenames.gni
+++ b/filenames.gni
@@ -23,7 +23,6 @@ filenames = {
 
   lib_sources_linux = [
     "shell/browser/browser_linux.cc",
-    "shell/browser/electron_browser_main_parts_linux.cc",
     "shell/browser/lib/power_observer_linux.cc",
     "shell/browser/lib/power_observer_linux.h",
     "shell/browser/linux/unity_service.cc",
diff --git a/patches/chromium/build_do_not_depend_on_packed_resource_integrity.patch b/patches/chromium/build_do_not_depend_on_packed_resource_integrity.patch
index 080b9e3c8ddc..a5fc56577f7f 100644
--- a/patches/chromium/build_do_not_depend_on_packed_resource_integrity.patch
+++ b/patches/chromium/build_do_not_depend_on_packed_resource_integrity.patch
@@ -33,10 +33,10 @@ index e648bb4ed2ff72441faa8773e449e0b6174f5af5..fd2c1d3ac575d10de7d5c09e4418d172
          "//base",
          "//build:branding_buildflags",
 diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
-index 9c4efeae559f3f752ea9f83904417a35ef436434..ed40f8c920714e6c241cedcbbff6b38ad311489b 100644
+index 1e937348e3210b4a3cf2762cfd7cafd27650ffaf..4dcfbbeb833b3483eed61b8eb98636fe69ee6d5a 100644
 --- a/chrome/browser/BUILD.gn
 +++ b/chrome/browser/BUILD.gn
-@@ -4753,7 +4753,7 @@ static_library("browser") {
+@@ -4755,7 +4755,7 @@ static_library("browser") {
        ]
      }
  
@@ -46,7 +46,7 @@ index 9c4efeae559f3f752ea9f83904417a35ef436434..ed40f8c920714e6c241cedcbbff6b38a
        # than here in :chrome_dll.
        deps += [ "//chrome:packed_resources_integrity_header" ]
 diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
-index b950e537f5fc2d8fd6137d9c9131858404e78d9c..dde9dfd95521ceac67dced54efe90e5068eba797 100644
+index 5e1202bd2a9118bdefe15be41a53c261c77aca62..2882d4546a3fc335e7889fa8ac15d8143a8f83ad 100644
 --- a/chrome/test/BUILD.gn
 +++ b/chrome/test/BUILD.gn
 @@ -7455,9 +7455,12 @@ test("unit_tests") {
diff --git a/patches/chromium/can_create_window.patch b/patches/chromium/can_create_window.patch
index ea6127817c87..835294ca891e 100644
--- a/patches/chromium/can_create_window.patch
+++ b/patches/chromium/can_create_window.patch
@@ -9,7 +9,7 @@ potentially prevent a window from being created.
 TODO(loc): this patch is currently broken.
 
 diff --git a/content/browser/renderer_host/render_frame_host_impl.cc b/content/browser/renderer_host/render_frame_host_impl.cc
-index 04ab9256afe51df82b2c5a34334a7e98f49bc82a..861468d545856eb894b3eaae943028b954c83b82 100644
+index 0a02467f8dff5278b5cc530f6d08b2402b52098d..d1bfad9bfdcb44b8988a6250b71e15d191134ba8 100644
 --- a/content/browser/renderer_host/render_frame_host_impl.cc
 +++ b/content/browser/renderer_host/render_frame_host_impl.cc
 @@ -9816,6 +9816,7 @@ void RenderFrameHostImpl::CreateNewWindow(
@@ -77,10 +77,10 @@ index fc433c5802ecb880f3f144f09c3d318814672213..6a1e1f2cfc60451bb097b3625245fbfb
  
  // Operation result when the renderer asks the browser to create a new window.
 diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
-index 5fb9980e5f7672a9b518776bcfc9e54726d24a62..707b3ca716d5654ddfcf40f43582524e0c2b6492 100644
+index 689203b138adf10a27c47dea61d3fe352df80b1e..2988ef70882ed30105d888491feb88db429c85ca 100644
 --- a/content/public/browser/content_browser_client.cc
 +++ b/content/public/browser/content_browser_client.cc
-@@ -862,6 +862,8 @@ bool ContentBrowserClient::CanCreateWindow(
+@@ -867,6 +867,8 @@ bool ContentBrowserClient::CanCreateWindow(
      const std::string& frame_name,
      WindowOpenDisposition disposition,
      const blink::mojom::WindowFeatures& features,
@@ -90,7 +90,7 @@ index 5fb9980e5f7672a9b518776bcfc9e54726d24a62..707b3ca716d5654ddfcf40f43582524e
      bool opener_suppressed,
      bool* no_javascript_access) {
 diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
-index 7e953576d8be22f2efa49ee8eb349ddab63fd276..84b2ec91bc0ec42f74e91c4d4a9d71b0ffc0bcd8 100644
+index ff5eca7750ef324cd036251affc0263f230710bb..f9372f547ef0d5914ba53b75aba44580a573fba0 100644
 --- a/content/public/browser/content_browser_client.h
 +++ b/content/public/browser/content_browser_client.h
 @@ -199,6 +199,7 @@ class NetworkService;
@@ -101,7 +101,7 @@ index 7e953576d8be22f2efa49ee8eb349ddab63fd276..84b2ec91bc0ec42f74e91c4d4a9d71b0
  }  // namespace network
  
  namespace sandbox {
-@@ -1428,6 +1429,8 @@ class CONTENT_EXPORT ContentBrowserClient {
+@@ -1435,6 +1436,8 @@ class CONTENT_EXPORT ContentBrowserClient {
        const std::string& frame_name,
        WindowOpenDisposition disposition,
        const blink::mojom::WindowFeatures& features,
diff --git a/patches/chromium/chore_modify_chromium_handling_of_mouse_events.patch b/patches/chromium/chore_modify_chromium_handling_of_mouse_events.patch
index bd3ba58cd096..72de41822a23 100644
--- a/patches/chromium/chore_modify_chromium_handling_of_mouse_events.patch
+++ b/patches/chromium/chore_modify_chromium_handling_of_mouse_events.patch
@@ -61,10 +61,10 @@ index dcda976f4c3cc0ba6bcf015d5bf7435df009ae30..13cfa18bf406f244ec361a1230ccce44
    Widget* GetWidget();
    const Widget* GetWidget() const;
 diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
-index eb1bc6840fcf026ed2ab902bae534607af84abee..88a4eeea8ff5226600c804c6df5832f93585b327 100644
+index 3637176c05a7074cb9042b74f7c9ea2e29af5ee5..3ed583cf09dec0ae83c3c9449e6ef7e1fa92aa8d 100644
 --- a/ui/views/win/hwnd_message_handler.cc
 +++ b/ui/views/win/hwnd_message_handler.cc
-@@ -3220,15 +3220,19 @@ LRESULT HWNDMessageHandler::HandleMouseEventInternal(UINT message,
+@@ -3239,15 +3239,19 @@ LRESULT HWNDMessageHandler::HandleMouseEventInternal(UINT message,
      }
      // We must let Windows handle the caption buttons if it's drawing them, or
      // they won't work.
@@ -86,7 +86,7 @@ index eb1bc6840fcf026ed2ab902bae534607af84abee..88a4eeea8ff5226600c804c6df5832f9
        return 0;
      }
    }
-@@ -3251,6 +3255,7 @@ LRESULT HWNDMessageHandler::HandleMouseEventInternal(UINT message,
+@@ -3270,6 +3274,7 @@ LRESULT HWNDMessageHandler::HandleMouseEventInternal(UINT message,
      // handle alt-space, or in the frame itself.
      is_right_mouse_pressed_on_caption_ = false;
      ReleaseCapture();
@@ -94,7 +94,7 @@ index eb1bc6840fcf026ed2ab902bae534607af84abee..88a4eeea8ff5226600c804c6df5832f9
      // |point| is in window coordinates, but WM_NCHITTEST and TrackPopupMenu()
      // expect screen coordinates.
      POINT screen_point = CR_POINT_INITIALIZER_FROM_LPARAM(l_param);
-@@ -3258,7 +3263,17 @@ LRESULT HWNDMessageHandler::HandleMouseEventInternal(UINT message,
+@@ -3277,7 +3282,17 @@ LRESULT HWNDMessageHandler::HandleMouseEventInternal(UINT message,
      w_param = static_cast<WPARAM>(SendMessage(
          hwnd(), WM_NCHITTEST, 0, MAKELPARAM(screen_point.x, screen_point.y)));
      if (w_param == HTCAPTION || w_param == HTSYSMENU) {
diff --git a/patches/chromium/chore_patch_out_profile_methods.patch b/patches/chromium/chore_patch_out_profile_methods.patch
index 1a9b19fe303f..8e5c6d04ecf3 100644
--- a/patches/chromium/chore_patch_out_profile_methods.patch
+++ b/patches/chromium/chore_patch_out_profile_methods.patch
@@ -7,7 +7,7 @@ Electron does not support Profiles, so we need to patch it out of any
 code that we use.
 
 diff --git a/chrome/browser/pdf/chrome_pdf_stream_delegate.cc b/chrome/browser/pdf/chrome_pdf_stream_delegate.cc
-index e3b9f14a4cf2167064ce6716053e663adffa1542..65f13a4607c8145858fd47d81cb9960c44272d79 100644
+index c390a83277f564f1a67a7dcffa36b9d77a35bc0b..b13273a4b194ad5e8ca2d1639ebca831f9607b1e 100644
 --- a/chrome/browser/pdf/chrome_pdf_stream_delegate.cc
 +++ b/chrome/browser/pdf/chrome_pdf_stream_delegate.cc
 @@ -45,6 +45,7 @@ namespace {
diff --git a/patches/chromium/custom_protocols_plzserviceworker.patch b/patches/chromium/custom_protocols_plzserviceworker.patch
index a921e308d4f0..cf915acdfbaf 100644
--- a/patches/chromium/custom_protocols_plzserviceworker.patch
+++ b/patches/chromium/custom_protocols_plzserviceworker.patch
@@ -8,10 +8,10 @@ Allow registering custom protocols to handle service worker main script fetching
 Refs https://bugs.chromium.org/p/chromium/issues/detail?id=996511
 
 diff --git a/content/browser/service_worker/service_worker_context_wrapper.cc b/content/browser/service_worker/service_worker_context_wrapper.cc
-index 3202822020573106b0ee2305f08971b3b542be69..9a033cb1f48288802fb349e885a152952fe95b98 100644
+index e08dddd88f7787884f0162966db6297c67d92770..847e6a6941486879972fb593ce510a4b76c8b72e 100644
 --- a/content/browser/service_worker/service_worker_context_wrapper.cc
 +++ b/content/browser/service_worker/service_worker_context_wrapper.cc
-@@ -1941,6 +1941,26 @@ ServiceWorkerContextWrapper::GetLoaderFactoryForBrowserInitiatedRequest(
+@@ -1947,6 +1947,26 @@ ServiceWorkerContextWrapper::GetLoaderFactoryForBrowserInitiatedRequest(
        loader_factory_bundle_info =
            context()->loader_factory_bundle_for_update_check()->Clone();
  
@@ -38,7 +38,7 @@ index 3202822020573106b0ee2305f08971b3b542be69..9a033cb1f48288802fb349e885a15295
    if (auto* config = content::WebUIConfigMap::GetInstance().GetConfig(
            browser_context(), scope)) {
      // If this is a Service Worker for a WebUI, the WebUI's URLDataSource
-@@ -1960,9 +1980,7 @@ ServiceWorkerContextWrapper::GetLoaderFactoryForBrowserInitiatedRequest(
+@@ -1966,9 +1986,7 @@ ServiceWorkerContextWrapper::GetLoaderFactoryForBrowserInitiatedRequest(
              features::kEnableServiceWorkersForChromeScheme) &&
          scope.scheme_piece() == kChromeUIScheme) {
        config->RegisterURLDataSource(browser_context());
@@ -49,7 +49,7 @@ index 3202822020573106b0ee2305f08971b3b542be69..9a033cb1f48288802fb349e885a15295
            .emplace(kChromeUIScheme, CreateWebUIServiceWorkerLoaderFactory(
                                          browser_context(), kChromeUIScheme,
                                          base::flat_set<std::string>()));
-@@ -1970,9 +1988,7 @@ ServiceWorkerContextWrapper::GetLoaderFactoryForBrowserInitiatedRequest(
+@@ -1976,9 +1994,7 @@ ServiceWorkerContextWrapper::GetLoaderFactoryForBrowserInitiatedRequest(
                     features::kEnableServiceWorkersForChromeUntrusted) &&
                 scope.scheme_piece() == kChromeUIUntrustedScheme) {
        config->RegisterURLDataSource(browser_context());
diff --git a/patches/chromium/enable_reset_aspect_ratio.patch b/patches/chromium/enable_reset_aspect_ratio.patch
index 4988c4752fb7..76c5a1ddf8e1 100644
--- a/patches/chromium/enable_reset_aspect_ratio.patch
+++ b/patches/chromium/enable_reset_aspect_ratio.patch
@@ -19,10 +19,10 @@ index 671960fb876b656abc572664cd1f28492c799123..896721c02c1cf0dac03d98b152af210e
                                     excluded_margin);
  }
 diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
-index 6c7e1291817f3eea03da90c206bd5b3a9b9d9beb..16efdf8effa060e489ba02f0cc086bfb0246cc26 100644
+index df17e97666de639f05b92a79ee7fbd4a3da6c64f..f404c718e0242ec9269e7d14eb236aa928fb5d58 100644
 --- a/ui/views/win/hwnd_message_handler.cc
 +++ b/ui/views/win/hwnd_message_handler.cc
-@@ -1049,8 +1049,11 @@ void HWNDMessageHandler::SetFullscreen(bool fullscreen,
+@@ -1050,8 +1050,11 @@ void HWNDMessageHandler::SetFullscreen(bool fullscreen,
  
  void HWNDMessageHandler::SetAspectRatio(float aspect_ratio,
                                          const gfx::Size& excluded_margin) {
diff --git a/patches/chromium/feat_corner_smoothing_css_rule_and_blink_painting.patch b/patches/chromium/feat_corner_smoothing_css_rule_and_blink_painting.patch
index fa42771e0954..661add0b1165 100644
--- a/patches/chromium/feat_corner_smoothing_css_rule_and_blink_painting.patch
+++ b/patches/chromium/feat_corner_smoothing_css_rule_and_blink_painting.patch
@@ -312,7 +312,7 @@ index 7e3d46902fbf736b4240eb3fcb89975a7b222197..57fdc89fc265ad70cb0bff8443cc1026
  
    auto DrawAsSinglePath = [&]() {
 diff --git a/third_party/blink/renderer/platform/runtime_enabled_features.json5 b/third_party/blink/renderer/platform/runtime_enabled_features.json5
-index 5b4a8a932a360b0fb3c9a488c8d97c44b4c77ed6..ab8677509fe77f16c0bc67333fa9967fb8ef4564 100644
+index f4784c62cca71fe5f6334d53336db530d6f313b0..ae17298da83ed8fcb505e5f9e07f682a4624ff13 100644
 --- a/third_party/blink/renderer/platform/runtime_enabled_features.json5
 +++ b/third_party/blink/renderer/platform/runtime_enabled_features.json5
 @@ -214,6 +214,10 @@
diff --git a/patches/chromium/fix_aspect_ratio_with_max_size.patch b/patches/chromium/fix_aspect_ratio_with_max_size.patch
index 2852ed58dd39..3a64048c8e9d 100644
--- a/patches/chromium/fix_aspect_ratio_with_max_size.patch
+++ b/patches/chromium/fix_aspect_ratio_with_max_size.patch
@@ -11,10 +11,10 @@ enlarge window above dimensions set during creation of the
 BrowserWindow.
 
 diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
-index 16efdf8effa060e489ba02f0cc086bfb0246cc26..eb1bc6840fcf026ed2ab902bae534607af84abee 100644
+index f404c718e0242ec9269e7d14eb236aa928fb5d58..3637176c05a7074cb9042b74f7c9ea2e29af5ee5 100644
 --- a/ui/views/win/hwnd_message_handler.cc
 +++ b/ui/views/win/hwnd_message_handler.cc
-@@ -3824,15 +3824,30 @@ void HWNDMessageHandler::SizeWindowToAspectRatio(UINT param,
+@@ -3843,15 +3843,30 @@ void HWNDMessageHandler::SizeWindowToAspectRatio(UINT param,
    delegate_->GetMinMaxSize(&min_window_size, &max_window_size);
    min_window_size = delegate_->DIPToScreenSize(min_window_size);
    max_window_size = delegate_->DIPToScreenSize(max_window_size);
diff --git a/patches/chromium/fix_non-client_mouse_tracking_and_message_bubbling_on_windows.patch b/patches/chromium/fix_non-client_mouse_tracking_and_message_bubbling_on_windows.patch
index 4da3fa160628..1fa8621a09e8 100644
--- a/patches/chromium/fix_non-client_mouse_tracking_and_message_bubbling_on_windows.patch
+++ b/patches/chromium/fix_non-client_mouse_tracking_and_message_bubbling_on_windows.patch
@@ -13,10 +13,10 @@ messages in the legacy window handle layer.
 These conditions are regularly hit with WCO-enabled windows on Windows.
 
 diff --git a/content/browser/renderer_host/legacy_render_widget_host_win.cc b/content/browser/renderer_host/legacy_render_widget_host_win.cc
-index 156fa90eada19fab3a1688302bbf3687cab6ab32..b13d4fcea374eff4309b4fbe84d53dd00c817e37 100644
+index 475629d48e8807547e0c79f6fa00d458bac3416c..97f4520fbf7797b19747b5101097d93cf475fb5c 100644
 --- a/content/browser/renderer_host/legacy_render_widget_host_win.cc
 +++ b/content/browser/renderer_host/legacy_render_widget_host_win.cc
-@@ -366,12 +366,12 @@ LRESULT LegacyRenderWidgetHostHWND::OnMouseRange(UINT message,
+@@ -375,12 +375,12 @@ LRESULT LegacyRenderWidgetHostHWND::OnMouseRange(UINT message,
                                                   WPARAM w_param,
                                                   LPARAM l_param,
                                                   BOOL& handled) {
@@ -31,7 +31,7 @@ index 156fa90eada19fab3a1688302bbf3687cab6ab32..b13d4fcea374eff4309b4fbe84d53dd0
        tme.hwndTrack = hwnd();
        tme.dwHoverTime = 0;
        TrackMouseEvent(&tme);
-@@ -404,7 +404,10 @@ LRESULT LegacyRenderWidgetHostHWND::OnMouseRange(UINT message,
+@@ -413,7 +413,10 @@ LRESULT LegacyRenderWidgetHostHWND::OnMouseRange(UINT message,
    // the picture.
    if (!handled &&
        (message >= WM_NCMOUSEMOVE && message <= WM_NCXBUTTONDBLCLK)) {
@@ -44,7 +44,7 @@ index 156fa90eada19fab3a1688302bbf3687cab6ab32..b13d4fcea374eff4309b4fbe84d53dd0
    }
    return ret;
 diff --git a/content/browser/renderer_host/legacy_render_widget_host_win.h b/content/browser/renderer_host/legacy_render_widget_host_win.h
-index 17952b4b6ab559ba1c9076b100b060a7011edeec..1eda20e67d3b3184bec154f24c4259bb4a49b099 100644
+index f9699ff0abf9036e9e1cabf626aa6395584cf896..94a8a50cb630182103c4256352d7a8a2acc8c76a 100644
 --- a/content/browser/renderer_host/legacy_render_widget_host_win.h
 +++ b/content/browser/renderer_host/legacy_render_widget_host_win.h
 @@ -105,6 +105,7 @@ class CONTENT_EXPORT LegacyRenderWidgetHostHWND
diff --git a/patches/chromium/fix_remove_caption-removing_style_call.patch b/patches/chromium/fix_remove_caption-removing_style_call.patch
index f8d4416e2404..610abd8000b5 100644
--- a/patches/chromium/fix_remove_caption-removing_style_call.patch
+++ b/patches/chromium/fix_remove_caption-removing_style_call.patch
@@ -18,10 +18,10 @@ or resizing, but Electron does not seem to run into that issue
 for opaque frameless windows even with that block commented out.
 
 diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
-index 88a4eeea8ff5226600c804c6df5832f93585b327..45b9be8cef981c570f7975f4bbd1d6d2fcc39afb 100644
+index 3ed583cf09dec0ae83c3c9449e6ef7e1fa92aa8d..1287e9eda295061a7ee9b758b3c0618933896d82 100644
 --- a/ui/views/win/hwnd_message_handler.cc
 +++ b/ui/views/win/hwnd_message_handler.cc
-@@ -1856,7 +1856,23 @@ LRESULT HWNDMessageHandler::OnCreate(CREATESTRUCT* create_struct) {
+@@ -1857,7 +1857,23 @@ LRESULT HWNDMessageHandler::OnCreate(CREATESTRUCT* create_struct) {
    SendMessage(hwnd(), WM_CHANGEUISTATE, MAKELPARAM(UIS_CLEAR, UISF_HIDEFOCUS),
                0);
  
diff --git a/patches/chromium/fix_resolve_dynamic_background_material_update_issue_on_windows_11.patch b/patches/chromium/fix_resolve_dynamic_background_material_update_issue_on_windows_11.patch
index d24eac2f4cb4..1d8c0cc802fc 100644
--- a/patches/chromium/fix_resolve_dynamic_background_material_update_issue_on_windows_11.patch
+++ b/patches/chromium/fix_resolve_dynamic_background_material_update_issue_on_windows_11.patch
@@ -36,10 +36,10 @@ index d8be4dffee3947e7ac6dc09cb8e1f2a6a834789b..8eb539af74c1934a55f9b14ad97dd93b
    // Overridden from DesktopWindowTreeHost:
    void Init(const Widget::InitParams& params) override;
 diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
-index 45b9be8cef981c570f7975f4bbd1d6d2fcc39afb..d73e822bfe9a86869cf5b8d1f63d6010b9ca95df 100644
+index 1287e9eda295061a7ee9b758b3c0618933896d82..e2b899dd25c12448068c99f1344cba4fea26e2c6 100644
 --- a/ui/views/win/hwnd_message_handler.cc
 +++ b/ui/views/win/hwnd_message_handler.cc
-@@ -993,13 +993,13 @@ void HWNDMessageHandler::FrameTypeChanged() {
+@@ -994,13 +994,13 @@ void HWNDMessageHandler::FrameTypeChanged() {
  
  void HWNDMessageHandler::PaintAsActiveChanged() {
    if (!delegate_->HasNonClientView() || !delegate_->CanActivate() ||
@@ -55,7 +55,7 @@ index 45b9be8cef981c570f7975f4bbd1d6d2fcc39afb..d73e822bfe9a86869cf5b8d1f63d6010
  }
  
  void HWNDMessageHandler::SetWindowIcons(const gfx::ImageSkia& window_icon,
-@@ -1083,7 +1083,14 @@ void HWNDMessageHandler::SizeConstraintsChanged() {
+@@ -1084,7 +1084,14 @@ void HWNDMessageHandler::SizeConstraintsChanged() {
    //   allowing ui::GetResizableFrameThickness() to be used consistently when
    //   removing the visible system frame.
    const bool had_caption_on_init = window_style() & WS_CAPTION;
@@ -71,7 +71,7 @@ index 45b9be8cef981c570f7975f4bbd1d6d2fcc39afb..d73e822bfe9a86869cf5b8d1f63d6010
    const bool can_maximize = can_resize && delegate_->CanMaximize();
  
    auto set_style_func = [&style](LONG bit, bool should_set) {
-@@ -1678,11 +1685,16 @@ void HWNDMessageHandler::ResetWindowRegion(bool force, bool redraw) {
+@@ -1679,11 +1686,16 @@ void HWNDMessageHandler::ResetWindowRegion(bool force, bool redraw) {
    // through, but that isn't the case when using Direct3D to draw transparent
    // windows. So we route translucent windows throught to the delegate to
    // allow for a custom hit mask.
@@ -89,7 +89,7 @@ index 45b9be8cef981c570f7975f4bbd1d6d2fcc39afb..d73e822bfe9a86869cf5b8d1f63d6010
      return;
    }
  
-@@ -2396,17 +2408,18 @@ LRESULT HWNDMessageHandler::OnNCActivate(UINT message,
+@@ -2415,17 +2427,18 @@ LRESULT HWNDMessageHandler::OnNCActivate(UINT message,
      delegate_->SchedulePaint();
    }
  
diff --git a/patches/chromium/frame_host_manager.patch b/patches/chromium/frame_host_manager.patch
index 8040a39a97b5..7750a1da7959 100644
--- a/patches/chromium/frame_host_manager.patch
+++ b/patches/chromium/frame_host_manager.patch
@@ -20,7 +20,7 @@ index 651cb633d791d769ae2758930e7fb6310aa3637b..5f2da839ab5ddd05d1242d07a2b24c26
  }
  
 diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
-index 84b2ec91bc0ec42f74e91c4d4a9d71b0ffc0bcd8..ea191e8305b3945a4ca3cd555d9649b905d12e19 100644
+index f9372f547ef0d5914ba53b75aba44580a573fba0..3d7b749b90d3aa59c17f4d3220805dda263b7037 100644
 --- a/content/public/browser/content_browser_client.h
 +++ b/content/public/browser/content_browser_client.h
 @@ -337,6 +337,11 @@ class CONTENT_EXPORT ContentBrowserClient {
diff --git a/patches/chromium/revert_views_remove_desktopwindowtreehostwin_window_enlargement.patch b/patches/chromium/revert_views_remove_desktopwindowtreehostwin_window_enlargement.patch
index d15522a940a0..4f6e5b7de6fc 100644
--- a/patches/chromium/revert_views_remove_desktopwindowtreehostwin_window_enlargement.patch
+++ b/patches/chromium/revert_views_remove_desktopwindowtreehostwin_window_enlargement.patch
@@ -10,10 +10,10 @@ on Windows.  We should refactor our code so that this patch isn't
 necessary.
 
 diff --git a/testing/variations/fieldtrial_testing_config.json b/testing/variations/fieldtrial_testing_config.json
-index d01dd0a53bb41f0c66676ca313453d43a2aab80a..620017bbe06e504a65bcb3a778be6f440a4d8bce 100644
+index d974ad3aa4bcb58a5c9bc5ed17be19820313d266..f2b99686fbb1ccd5f356b44f81d490bb67dee899 100644
 --- a/testing/variations/fieldtrial_testing_config.json
 +++ b/testing/variations/fieldtrial_testing_config.json
-@@ -24851,6 +24851,21 @@
+@@ -24867,6 +24867,21 @@
              ]
          }
      ],
diff --git a/patches/chromium/webview_fullscreen.patch b/patches/chromium/webview_fullscreen.patch
index 855c67e37c0f..f95b190c0b6b 100644
--- a/patches/chromium/webview_fullscreen.patch
+++ b/patches/chromium/webview_fullscreen.patch
@@ -15,7 +15,7 @@ Note that we also need to manually update embedder's
 `api::WebContents::IsFullscreenForTabOrPending` value.
 
 diff --git a/content/browser/renderer_host/render_frame_host_impl.cc b/content/browser/renderer_host/render_frame_host_impl.cc
-index 861468d545856eb894b3eaae943028b954c83b82..3d6489a4abcdf7f6c26507583df446c4b293cd13 100644
+index d1bfad9bfdcb44b8988a6250b71e15d191134ba8..71151ec503d38b8dbbcbc4c12530a9a88212388a 100644
 --- a/content/browser/renderer_host/render_frame_host_impl.cc
 +++ b/content/browser/renderer_host/render_frame_host_impl.cc
 @@ -8922,6 +8922,17 @@ void RenderFrameHostImpl::EnterFullscreen(
diff --git a/shell/browser/electron_browser_main_parts.cc b/shell/browser/electron_browser_main_parts.cc
index aaa45b082659..bb1cc5bd295a 100644
--- a/shell/browser/electron_browser_main_parts.cc
+++ b/shell/browser/electron_browser_main_parts.cc
@@ -210,7 +210,6 @@ int ElectronBrowserMainParts::PreEarlyInitialization() {
   HandleSIGCHLD();
 #endif
 #if BUILDFLAG(IS_LINUX)
-  DetectOzonePlatform();
   ui::OzonePlatform::PreEarlyInitialization();
 #endif
 #if BUILDFLAG(IS_MAC)
diff --git a/shell/browser/electron_browser_main_parts.h b/shell/browser/electron_browser_main_parts.h
index ebf3e10ff1d3..86897fc9c780 100644
--- a/shell/browser/electron_browser_main_parts.h
+++ b/shell/browser/electron_browser_main_parts.h
@@ -124,10 +124,6 @@ class ElectronBrowserMainParts : public content::BrowserMainParts {
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
 #endif
 
-#if BUILDFLAG(IS_LINUX)
-  void DetectOzonePlatform();
-#endif
-
 #if BUILDFLAG(IS_MAC)
   void FreeAppDelegate();
   void RegisterURLHandler();
diff --git a/shell/browser/electron_browser_main_parts_linux.cc b/shell/browser/electron_browser_main_parts_linux.cc
deleted file mode 100644
index 87e2f50d2a2e..000000000000
--- a/shell/browser/electron_browser_main_parts_linux.cc
+++ /dev/null
@@ -1,135 +0,0 @@
-// Copyright (c) 2022 GitHub, Inc.
-// Use of this source code is governed by the MIT license that can be
-// found in the LICENSE file.
-
-#include "shell/browser/electron_browser_main_parts.h"
-
-#include "base/command_line.h"
-#include "base/environment.h"
-#include "base/strings/cstring_view.h"
-#include "ui/base/ozone_buildflags.h"
-#include "ui/ozone/public/ozone_switches.h"
-
-#if BUILDFLAG(IS_OZONE_WAYLAND)
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/nix/xdg_util.h"
-#include "shell/common/thread_restrictions.h"
-#endif
-
-namespace electron {
-
-namespace {
-
-constexpr base::cstring_view kElectronOzonePlatformHint{
-    "ELECTRON_OZONE_PLATFORM_HINT"};
-
-#if BUILDFLAG(IS_OZONE_WAYLAND)
-
-constexpr char kPlatformWayland[] = "wayland";
-
-bool HasWaylandDisplay(base::Environment* env) {
-  if (std::optional<std::string> wayland_display =
-          env->GetVar("WAYLAND_DISPLAY")) {
-    return true;
-  }
-
-  if (std::optional<std::string> xdg_runtime_dir =
-          env->GetVar("XDG_RUNTIME_DIR")) {
-    auto wayland_server_pipe =
-        base::FilePath(*xdg_runtime_dir).Append("wayland-0");
-    // Normally, this should happen exactly once, at the startup of the main
-    // process.
-    electron::ScopedAllowBlockingForElectron allow_blocking;
-    return base::PathExists(wayland_server_pipe);
-  }
-
-  return false;
-}
-
-#endif  // BUILDFLAG(IS_OZONE_WAYLAND)
-
-#if BUILDFLAG(IS_OZONE_X11)
-constexpr char kPlatformX11[] = "x11";
-#endif
-
-// Evaluates the environment and returns the effective platform name for the
-// given |ozone_platform_hint|.
-// For the "auto" value, returns "wayland" if the XDG session type is "wayland",
-// "x11" otherwise.
-// For the "wayland" value, checks if the Wayland server is available, and
-// returns "x11" if it is not.
-// See https://crbug.com/1246928.
-std::string MaybeFixPlatformName(const std::string& ozone_platform_hint) {
-#if BUILDFLAG(IS_OZONE_WAYLAND)
-  // Wayland is selected if both conditions below are true:
-  // 1. The user selected either 'wayland' or 'auto'.
-  // 2. The XDG session type is 'wayland', OR the user has selected 'wayland'
-  //    explicitly and a Wayland server is running.
-  // Otherwise, fall back to X11.
-  if (ozone_platform_hint == kPlatformWayland ||
-      ozone_platform_hint == "auto") {
-    auto env(base::Environment::Create());
-
-    std::optional<std::string> xdg_session_type =
-        env->GetVar(base::nix::kXdgSessionTypeEnvVar);
-    if ((xdg_session_type.has_value() && *xdg_session_type == "wayland") ||
-        (ozone_platform_hint == kPlatformWayland &&
-         HasWaylandDisplay(env.get()))) {
-      return kPlatformWayland;
-    }
-  }
-#endif  // BUILDFLAG(IS_OZONE_WAYLAND)
-
-#if BUILDFLAG(IS_OZONE_X11)
-  if (ozone_platform_hint == kPlatformX11) {
-    return kPlatformX11;
-  }
-#if BUILDFLAG(IS_OZONE_WAYLAND)
-  if (ozone_platform_hint == kPlatformWayland ||
-      ozone_platform_hint == "auto") {
-    // We are here if:
-    // - The binary has both X11 and Wayland backends.
-    // - The user wanted Wayland but that did not work, otherwise it would have
-    //   been returned above.
-    if (ozone_platform_hint == kPlatformWayland) {
-      LOG(WARNING) << "No Wayland server is available. Falling back to X11.";
-    } else {
-      LOG(WARNING) << "This is not a Wayland session.  Falling back to X11. "
-                      "If you need to run Chrome on Wayland using some "
-                      "embedded compositor, e. g., Weston, please specify "
-                      "Wayland as your preferred Ozone platform, or use "
-                      "--ozone-platform=wayland.";
-    }
-    return kPlatformX11;
-  }
-#endif  // BUILDFLAG(IS_OZONE_WAYLAND)
-#endif  // BUILDFLAG(OZONE_PLATFORM_X11)
-
-  return ozone_platform_hint;
-}
-
-}  // namespace
-
-void ElectronBrowserMainParts::DetectOzonePlatform() {
-  auto const env = base::Environment::Create();
-  auto* const command_line = base::CommandLine::ForCurrentProcess();
-  if (!command_line->HasSwitch(switches::kOzonePlatform)) {
-    auto ozone_platform_hint =
-        command_line->GetSwitchValueASCII(switches::kOzonePlatformHint);
-    if (ozone_platform_hint.empty()) {
-      ozone_platform_hint =
-          env->GetVar(kElectronOzonePlatformHint).value_or("");
-    }
-    if (!ozone_platform_hint.empty()) {
-      command_line->AppendSwitchASCII(
-          switches::kOzonePlatform, MaybeFixPlatformName(ozone_platform_hint));
-    }
-  }
-
-  if (std::optional<std::string> desktop_startup_id =
-          env->GetVar("DESKTOP_STARTUP_ID"))
-    command_line->AppendSwitchASCII("desktop-startup-id", *desktop_startup_id);
-}
-
-}  // namespace electron