diff --git a/patches/chromium/can_create_window.patch b/patches/chromium/can_create_window.patch
index ab16a6274364..67d6623cca43 100644
--- a/patches/chromium/can_create_window.patch
+++ b/patches/chromium/can_create_window.patch
@@ -21,10 +21,21 @@ index 378e3eb2f8b9d4daaf39ef213dec88d86cf90a5c..0ace2e0c7073ee97ebb274db4b184a07
            &no_javascript_access);
  
 diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
-index 5c319d0b7c81cb7335170a23e2863750ae9c6aa0..336bc9c329aed83293e6a802c8504a73cdf15b20 100644
+index 5c319d0b7c81cb7335170a23e2863750ae9c6aa0..ec2989ca2c736140c9be6b78591798ac733e752e 100644
 --- a/content/browser/web_contents/web_contents_impl.cc
 +++ b/content/browser/web_contents/web_contents_impl.cc
-@@ -5336,6 +5336,12 @@ FrameTree* WebContentsImpl::CreateNewWindow(
+@@ -5281,6 +5281,10 @@ FrameTree* WebContentsImpl::CreateNewWindow(
+   create_params.initially_hidden = renderer_started_hidden;
+   create_params.initial_popup_url = params.target_url;
+ 
++  // Potentially allow the delegate to override the create_params.
++  if (delegate_)
++    delegate_->MaybeOverrideCreateParamsForNewWindow(&create_params);
++
+   // Even though all codepaths leading here are in response to a renderer
+   // trying to open a new window, if the new window ends up in a different
+   // browsing instance, then the RenderViewHost, RenderWidgetHost,
+@@ -5336,6 +5340,12 @@ FrameTree* WebContentsImpl::CreateNewWindow(
    // Sets the newly created WebContents WindowOpenDisposition.
    new_contents_impl->original_window_open_disposition_ = params.disposition;
  
@@ -37,7 +48,7 @@ index 5c319d0b7c81cb7335170a23e2863750ae9c6aa0..336bc9c329aed83293e6a802c8504a73
    // If the new frame has a name, make sure any SiteInstances that can find
    // this named frame have proxies for it.  Must be called after
    // SetSessionStorageNamespace, since this calls CreateRenderView, which uses
-@@ -5377,12 +5383,6 @@ FrameTree* WebContentsImpl::CreateNewWindow(
+@@ -5377,12 +5387,6 @@ FrameTree* WebContentsImpl::CreateNewWindow(
      AddWebContentsDestructionObserver(new_contents_impl);
    }
  
@@ -122,7 +133,7 @@ index ca92e2ddf78d8f386b5ab23a09876d3b44e21334..33be50ce93dd998df5244f9ade391943
      WebContents* source,
      const OpenURLParams& params,
 diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
-index a4b8c5f950549e018c0d09522ff8890a1a774966..e364ae0f9bfa6321f3a3be598b36eb07fb5bca7a 100644
+index a4b8c5f950549e018c0d09522ff8890a1a774966..6c4c6265c26f5304b8f77d7fc5a4fad5dffc831d 100644
 --- a/content/public/browser/web_contents_delegate.h
 +++ b/content/public/browser/web_contents_delegate.h
 @@ -18,6 +18,7 @@
@@ -133,7 +144,15 @@ index a4b8c5f950549e018c0d09522ff8890a1a774966..e364ae0f9bfa6321f3a3be598b36eb07
  #include "content/public/browser/eye_dropper.h"
  #include "content/public/browser/fullscreen_types.h"
  #include "content/public/browser/invalidate_type.h"
-@@ -384,6 +385,13 @@ class CONTENT_EXPORT WebContentsDelegate {
+@@ -29,6 +30,7 @@
+ #include "content/public/browser/select_audio_output_request.h"
+ #include "content/public/browser/serial_chooser.h"
+ #include "content/public/browser/storage_partition_config.h"
++#include "content/public/browser/web_contents.h"
+ #include "content/public/common/window_container_type.mojom-forward.h"
+ #include "third_party/blink/public/common/input/web_mouse_event.h"
+ #include "third_party/blink/public/common/mediastream/media_stream_request.h"
+@@ -384,6 +386,16 @@ class CONTENT_EXPORT WebContentsDelegate {
        const StoragePartitionConfig& partition_config,
        SessionStorageNamespace* session_storage_namespace);
  
@@ -143,6 +162,9 @@ index a4b8c5f950549e018c0d09522ff8890a1a774966..e364ae0f9bfa6321f3a3be598b36eb07
 +      int opener_render_frame_id,
 +      const mojom::CreateNewWindowParams& params,
 +      WebContents* new_contents);
++
++  virtual void MaybeOverrideCreateParamsForNewWindow(
++      content::WebContents::CreateParams* create_params) {}
 +
    // Notifies the delegate about the creation of a new WebContents. This
    // typically happens when popups are created.
diff --git a/patches/chromium/chore_partial_revert_of.patch b/patches/chromium/chore_partial_revert_of.patch
index 53c34c98428d..267b939513d7 100644
--- a/patches/chromium/chore_partial_revert_of.patch
+++ b/patches/chromium/chore_partial_revert_of.patch
@@ -14,7 +14,7 @@ track down the source of this problem & figure out if we can fix it
 by changing something in Electron.
 
 diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
-index cc7042ef657b5b248869c9fe560fbece07e1d7d6..b286ce081a19a3ca02cfffaa8ac32e407bbff02a 100644
+index 65d5726b06a24d6ffca55413fd767cb46c87a137..3f68fa06dd2864e047d12f0c59a3c649494f0bf9 100644
 --- a/content/browser/web_contents/web_contents_impl.cc
 +++ b/content/browser/web_contents/web_contents_impl.cc
 @@ -5252,7 +5252,7 @@ FrameTree* WebContentsImpl::CreateNewWindow(
diff --git a/patches/chromium/chore_provide_iswebcontentscreationoverridden_with_full_params.patch b/patches/chromium/chore_provide_iswebcontentscreationoverridden_with_full_params.patch
index 1b622788dde7..b76b08b787c0 100644
--- a/patches/chromium/chore_provide_iswebcontentscreationoverridden_with_full_params.patch
+++ b/patches/chromium/chore_provide_iswebcontentscreationoverridden_with_full_params.patch
@@ -222,7 +222,7 @@ index b969f1d97b7e3396119b579cfbe61e19ff7d2dd4..b8d6169652da28266a514938b45b39c5
    content::WebContents* AddNewContents(
        content::WebContents* source,
 diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
-index c093f8b4ba872969a88923f2f96597bb8ffc8817..c1c1b4974339e1f08845815ef2d87b213e8597d9 100644
+index e1f9c3070f0de3ee2d54791bd18fcdf35de6b7b5..2004582d7041b94a3232c3c160b2bfd9351f6658 100644
 --- a/content/browser/web_contents/web_contents_impl.cc
 +++ b/content/browser/web_contents/web_contents_impl.cc
 @@ -5215,8 +5215,7 @@ FrameTree* WebContentsImpl::CreateNewWindow(
@@ -250,10 +250,10 @@ index 33be50ce93dd998df5244f9ade391943f06978ad..3bb9baf76d331351d23d59fc2b9eb82d
  }
  
 diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
-index e364ae0f9bfa6321f3a3be598b36eb07fb5bca7a..c75fdf6bd7cb6b4d6bcfbb23da952adce4dd90ac 100644
+index 6c4c6265c26f5304b8f77d7fc5a4fad5dffc831d..d0842904102fee982bc8502478a0a9067bb77904 100644
 --- a/content/public/browser/web_contents_delegate.h
 +++ b/content/public/browser/web_contents_delegate.h
-@@ -363,8 +363,7 @@ class CONTENT_EXPORT WebContentsDelegate {
+@@ -364,8 +364,7 @@ class CONTENT_EXPORT WebContentsDelegate {
        SiteInstance* source_site_instance,
        mojom::WindowContainerType window_container_type,
        const GURL& opener_url,
diff --git a/patches/chromium/fix_on-screen-keyboard_hides_on_input_blur_in_webview.patch b/patches/chromium/fix_on-screen-keyboard_hides_on_input_blur_in_webview.patch
index 6798da0aaf17..2112fbebe91d 100644
--- a/patches/chromium/fix_on-screen-keyboard_hides_on_input_blur_in_webview.patch
+++ b/patches/chromium/fix_on-screen-keyboard_hides_on_input_blur_in_webview.patch
@@ -87,10 +87,10 @@ index 75df43e3cd2721a92c90c18154d53d5c203e2465..ce42c75c8face36d21f53f44c0201ac4
    // The view with active text input state, i.e., a focused <input> element.
    // It will be nullptr if no such view exists. Note that the active view
 diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
-index 7aa1e2d3b0cbc8055cd60987ad3cbc96e09c25f4..cc7042ef657b5b248869c9fe560fbece07e1d7d6 100644
+index f49eefa91c94e85091879c0e521a5e27d1165d74..65d5726b06a24d6ffca55413fd767cb46c87a137 100644
 --- a/content/browser/web_contents/web_contents_impl.cc
 +++ b/content/browser/web_contents/web_contents_impl.cc
-@@ -10068,7 +10068,7 @@ void WebContentsImpl::OnFocusedElementChangedInFrame(
+@@ -10072,7 +10072,7 @@ void WebContentsImpl::OnFocusedElementChangedInFrame(
                          "WebContentsImpl::OnFocusedElementChangedInFrame",
                          "render_frame_host", frame);
    RenderWidgetHostViewBase* root_view =
diff --git a/patches/chromium/refactor_expose_cursor_changes_to_the_webcontentsobserver.patch b/patches/chromium/refactor_expose_cursor_changes_to_the_webcontentsobserver.patch
index d20f084adcf1..91f757e9670c 100644
--- a/patches/chromium/refactor_expose_cursor_changes_to_the_webcontentsobserver.patch
+++ b/patches/chromium/refactor_expose_cursor_changes_to_the_webcontentsobserver.patch
@@ -44,10 +44,10 @@ index 0c5aa1c0e4c344f807cf0fcb7cc3cf532c1eaf23..ecbfaf2e7fd842a6f55002975e5bb4c4
  
  void RenderWidgetHostImpl::ShowContextMenuAtPoint(
 diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
-index 336bc9c329aed83293e6a802c8504a73cdf15b20..c093f8b4ba872969a88923f2f96597bb8ffc8817 100644
+index ec2989ca2c736140c9be6b78591798ac733e752e..e1f9c3070f0de3ee2d54791bd18fcdf35de6b7b5 100644
 --- a/content/browser/web_contents/web_contents_impl.cc
 +++ b/content/browser/web_contents/web_contents_impl.cc
-@@ -6089,6 +6089,11 @@ TextInputManager* WebContentsImpl::GetTextInputManager() {
+@@ -6093,6 +6093,11 @@ TextInputManager* WebContentsImpl::GetTextInputManager() {
    return text_input_manager_.get();
  }
  
diff --git a/patches/chromium/refactor_unfilter_unresponsive_events.patch b/patches/chromium/refactor_unfilter_unresponsive_events.patch
index 89c5eb713c14..ae098c65c6e6 100644
--- a/patches/chromium/refactor_unfilter_unresponsive_events.patch
+++ b/patches/chromium/refactor_unfilter_unresponsive_events.patch
@@ -15,10 +15,10 @@ This CL removes these filters so the unresponsive event can still be
 accessed from our JS event. The filtering is moved into Electron's code.
 
 diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
-index b286ce081a19a3ca02cfffaa8ac32e407bbff02a..e17f75be3878b9ba7a7a33babc88fcc105ddc267 100644
+index 3f68fa06dd2864e047d12f0c59a3c649494f0bf9..4cd0c02dda57e1d718dbac953c937b492d06150c 100644
 --- a/content/browser/web_contents/web_contents_impl.cc
 +++ b/content/browser/web_contents/web_contents_impl.cc
-@@ -10205,25 +10205,13 @@ void WebContentsImpl::RendererUnresponsive(
+@@ -10209,25 +10209,13 @@ void WebContentsImpl::RendererUnresponsive(
      base::RepeatingClosure hang_monitor_restarter) {
    OPTIONAL_TRACE_EVENT1("content", "WebContentsImpl::RendererUnresponsive",
                          "render_widget_host", render_widget_host);
diff --git a/patches/chromium/web_contents.patch b/patches/chromium/web_contents.patch
index 84e659baf2e3..c79585c2173d 100644
--- a/patches/chromium/web_contents.patch
+++ b/patches/chromium/web_contents.patch
@@ -9,7 +9,7 @@ is needed for OSR.
 Originally landed in https://github.com/electron/libchromiumcontent/pull/226.
 
 diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
-index c1c1b4974339e1f08845815ef2d87b213e8597d9..4b309a0af2a747e46a9231eb35c00a825f4a0712 100644
+index 2004582d7041b94a3232c3c160b2bfd9351f6658..2a70e261f9ec17be3d666a06b7dad3abae093aaf 100644
 --- a/content/browser/web_contents/web_contents_impl.cc
 +++ b/content/browser/web_contents/web_contents_impl.cc
 @@ -4133,6 +4133,13 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params,
diff --git a/patches/chromium/webview_fullscreen.patch b/patches/chromium/webview_fullscreen.patch
index 86b8fec39bcc..e8f9de966f2f 100644
--- a/patches/chromium/webview_fullscreen.patch
+++ b/patches/chromium/webview_fullscreen.patch
@@ -37,7 +37,7 @@ index 0ace2e0c7073ee97ebb274db4b184a074f6ae544..ee3015214724be708ca15d480d105bbf
    if (had_fullscreen_token && !GetView()->HasFocus())
      GetView()->Focus();
 diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
-index 4b309a0af2a747e46a9231eb35c00a825f4a0712..7aa1e2d3b0cbc8055cd60987ad3cbc96e09c25f4 100644
+index 2a70e261f9ec17be3d666a06b7dad3abae093aaf..f49eefa91c94e85091879c0e521a5e27d1165d74 100644
 --- a/content/browser/web_contents/web_contents_impl.cc
 +++ b/content/browser/web_contents/web_contents_impl.cc
 @@ -4422,21 +4422,25 @@ KeyboardEventProcessingResult WebContentsImpl::PreHandleKeyboardEvent(
diff --git a/shell/browser/api/electron_api_web_contents.cc b/shell/browser/api/electron_api_web_contents.cc
index 5e14a9f4d344..a0a77d17f522 100644
--- a/shell/browser/api/electron_api_web_contents.cc
+++ b/shell/browser/api/electron_api_web_contents.cc
@@ -1211,6 +1211,31 @@ content::WebContents* WebContents::CreateCustomWebContents(
   return nullptr;
 }
 
+void WebContents::MaybeOverrideCreateParamsForNewWindow(
+    content::WebContents::CreateParams* create_params) {
+  v8::Isolate* isolate = JavascriptEnvironment::GetIsolate();
+  v8::HandleScope handle_scope(isolate);
+  gin_helper::Dictionary dict;
+  gin::ConvertFromV8(isolate, pending_child_web_preferences_.Get(isolate),
+                     &dict);
+
+  v8::Local<v8::Value> use_offscreen;
+  if (dict.Get(options::kOffscreen, &use_offscreen)) {
+    bool is_offscreen =
+        use_offscreen->IsObject() ||
+        (use_offscreen->IsBoolean() &&
+         dict.Get(options::kOffscreen, &is_offscreen) && is_offscreen);
+
+    if (is_offscreen) {
+      auto* view = new OffScreenWebContentsView(
+          false, offscreen_use_shared_texture_,
+          base::BindRepeating(&WebContents::OnPaint, base::Unretained(this)));
+      create_params->view = view;
+      create_params->delegate_view = view;
+    }
+  }
+}
+
 content::WebContents* WebContents::AddNewContents(
     content::WebContents* source,
     std::unique_ptr<content::WebContents> new_contents,
@@ -1224,9 +1249,13 @@ content::WebContents* WebContents::AddNewContents(
 
   v8::Isolate* isolate = JavascriptEnvironment::GetIsolate();
 
+  Type type = Type::kBrowserWindow;
+  auto* web_preferences = WebContentsPreferences::From(new_contents.get());
+  if (web_preferences && web_preferences->IsOffscreen())
+    type = Type::kOffScreen;
+
   v8::HandleScope handle_scope(isolate);
-  auto api_web_contents =
-      CreateAndTake(isolate, std::move(new_contents), Type::kBrowserWindow);
+  auto api_web_contents = CreateAndTake(isolate, std::move(new_contents), type);
 
   // We call RenderFrameCreated here as at this point the empty "about:blank"
   // render frame has already been created.  If the window never navigates again
diff --git a/shell/browser/api/electron_api_web_contents.h b/shell/browser/api/electron_api_web_contents.h
index 09262988ea6a..390d0e37c5fd 100644
--- a/shell/browser/api/electron_api_web_contents.h
+++ b/shell/browser/api/electron_api_web_contents.h
@@ -510,6 +510,8 @@ class WebContents final : public ExclusiveAccessContext,
       int opener_render_frame_id,
       const content::mojom::CreateNewWindowParams& params,
       content::WebContents* new_contents) override;
+  void MaybeOverrideCreateParamsForNewWindow(
+      content::WebContents::CreateParams* create_params) override;
   content::WebContents* AddNewContents(
       content::WebContents* source,
       std::unique_ptr<content::WebContents> new_contents,
diff --git a/spec/guest-window-manager-spec.ts b/spec/guest-window-manager-spec.ts
index 88daa4cfae2a..c614f6e42c89 100644
--- a/spec/guest-window-manager-spec.ts
+++ b/spec/guest-window-manager-spec.ts
@@ -4,6 +4,7 @@ import { expect, assert } from 'chai';
 
 import { once } from 'node:events';
 import * as http from 'node:http';
+import * as nodePath from 'node:path';
 
 import { HexColors, ScreenCapture, hasCapturableScreen } from './lib/screen-helpers';
 import { ifit, listen } from './lib/spec-helpers';
@@ -203,6 +204,66 @@ describe('webContents.setWindowOpenHandler', () => {
       expect(await browserWindow.webContents.executeJavaScript('42')).to.equal(42);
     });
 
+    it('can open an offscreen child window from an onscreen parent', async () => {
+      browserWindow.webContents.setWindowOpenHandler(() => ({
+        action: 'allow',
+        overrideBrowserWindowOptions: {
+          webPreferences: {
+            offscreen: true
+          }
+        }
+      }));
+
+      const didCreateWindow = once(browserWindow.webContents, 'did-create-window');
+      const url = `file://${nodePath.join('fixtures', 'pages', 'content.html')}`;
+      browserWindow.webContents.executeJavaScript(`window.open('${JSON.stringify(url)}') && true`);
+      const [childWindow] = await didCreateWindow;
+      expect(childWindow.webContents.isOffscreen()).to.be.true('Child window should be offscreen');
+    });
+
+    it('can open an onscreen child window from an offscreen parent', async () => {
+      const obw = new BrowserWindow({
+        show: false,
+        webPreferences: {
+          offscreen: true
+        }
+      });
+
+      await obw.loadURL('about:blank');
+      obw.webContents.setWindowOpenHandler(() => ({ action: 'allow' }));
+
+      const didCreateWindow = once(obw.webContents, 'did-create-window');
+      const url = `file://${nodePath.join('fixtures', 'pages', 'content.html')}`;
+      obw.webContents.executeJavaScript(`window.open('${JSON.stringify(url)}') && true`);
+      const [childWindow] = await didCreateWindow;
+      expect(childWindow.webContents.isOffscreen()).to.be.false('Child window should not be offscreen');
+    });
+
+    it('can open an offscreen child window from an offscreen parent', async () => {
+      const obw = new BrowserWindow({
+        show: false,
+        webPreferences: {
+          offscreen: true
+        }
+      });
+
+      await obw.loadURL('about:blank');
+      obw.webContents.setWindowOpenHandler(() => ({
+        action: 'allow',
+        overrideBrowserWindowOptions: {
+          webPreferences: {
+            offscreen: true
+          }
+        }
+      }));
+
+      const didCreateWindow = once(obw.webContents, 'did-create-window');
+      const url = `file://${nodePath.join('fixtures', 'pages', 'content.html')}`;
+      obw.webContents.executeJavaScript(`window.open('${JSON.stringify(url)}') && true`);
+      const [childWindow] = await didCreateWindow;
+      expect(childWindow.webContents.isOffscreen()).to.be.true('Child window should be offscreen');
+    });
+
     ifit(hasCapturableScreen())('should not make child window background transparent', async () => {
       browserWindow.webContents.setWindowOpenHandler(() => ({ action: 'allow' }));
       const didCreateWindow = once(browserWindow.webContents, 'did-create-window');