diff --git a/libcef/browser/alloy/alloy_browser_context.cc b/libcef/browser/alloy/alloy_browser_context.cc
index cd4c3d016..c6523c8d4 100644
--- a/libcef/browser/alloy/alloy_browser_context.cc
+++ b/libcef/browser/alloy/alloy_browser_context.cc
@@ -194,6 +194,10 @@ void AlloyBrowserContext::Shutdown() {
 
   ChromePluginServiceFilter::GetInstance()->UnregisterProfile(this);
 
+  // Clear this reference before the associated KeyedServiceFactory is destroyed
+  // by PerformInterlockedTwoPhaseShutdown().
+  extension_system_ = nullptr;
+
   // Remove any BrowserContextKeyedServiceFactory associations. This must be
   // called before the ProxyService owned by AlloyBrowserContext is destroyed.
   // The SimpleDependencyManager should always be passed after the
diff --git a/libcef/browser/alloy/alloy_browser_host_impl.cc b/libcef/browser/alloy/alloy_browser_host_impl.cc
index 0d520e7b4..017ab7600 100644
--- a/libcef/browser/alloy/alloy_browser_host_impl.cc
+++ b/libcef/browser/alloy/alloy_browser_host_impl.cc
@@ -581,17 +581,6 @@ void AlloyBrowserHostImpl::DestroyBrowser() {
 
   destruction_state_ = DESTRUCTION_STATE_COMPLETED;
 
-  // Notify that this browser has been destroyed. These must be delivered in
-  // the expected order.
-
-  // 1. Notify the platform delegate. With Views this will result in a call to
-  // CefBrowserViewDelegate::OnBrowserDestroyed().
-  platform_delegate_->NotifyBrowserDestroyed();
-
-  // 2. Notify the browser's LifeSpanHandler. This must always be the last
-  // notification for this browser.
-  OnBeforeClose();
-
   // Destroy any platform constructs first.
   if (javascript_dialog_manager_.get()) {
     javascript_dialog_manager_->Destroy();
@@ -600,16 +589,8 @@ void AlloyBrowserHostImpl::DestroyBrowser() {
     menu_manager_->Destroy();
   }
 
-  // Notify any observers that may have state associated with this browser.
-  OnBrowserDestroyed();
-
-  // If the WebContents still exists at this point, signal destruction before
-  // browser destruction.
-  if (web_contents()) {
-    WebContentsDestroyed();
-  }
-
-  // Disassociate the platform delegate from this browser.
+  // Disassociate the platform delegate from this browser. This will trigger
+  // WebContents destruction in most cases.
   platform_delegate_->BrowserDestroyed(this);
 
   // Delete objects created by the platform delegate that may be referenced by
@@ -1408,10 +1389,22 @@ void AlloyBrowserHostImpl::AccessibilityLocationChangesReceived(
 }
 
 void AlloyBrowserHostImpl::WebContentsDestroyed() {
+  // In case we're notified before the CefBrowserContentsDelegate,
+  // reset it first for consistent state in DestroyWebContents.
+  if (GetWebContents()) {
+    contents_delegate_->WebContentsDestroyed();
+  }
+
   auto wc = web_contents();
   content::WebContentsObserver::Observe(nullptr);
-  if (platform_delegate_) {
-    platform_delegate_->WebContentsDestroyed(wc);
+  DestroyWebContents(wc);
+
+  if (destruction_state_ < DESTRUCTION_STATE_COMPLETED) {
+    // We were not called via DestroyBrowser. This can occur when (for example)
+    // a pending popup WebContents is destroyed during parent WebContents
+    // destruction. Try to close the associated browser now.
+    CEF_POST_TASK(CEF_UIT, base::BindOnce(&AlloyBrowserHostImpl::CloseBrowser,
+                                          this, /*force_close=*/true));
   }
 }
 
diff --git a/libcef/browser/alloy/alloy_content_browser_client.cc b/libcef/browser/alloy/alloy_content_browser_client.cc
index d3ceedbd5..442538fd7 100644
--- a/libcef/browser/alloy/alloy_content_browser_client.cc
+++ b/libcef/browser/alloy/alloy_content_browser_client.cc
@@ -384,6 +384,10 @@ AlloyContentBrowserClient::AlloyContentBrowserClient() = default;
 
 AlloyContentBrowserClient::~AlloyContentBrowserClient() = default;
 
+void AlloyContentBrowserClient::CleanupOnUIThread() {
+  browser_main_parts_ = nullptr;
+}
+
 std::unique_ptr<content::BrowserMainParts>
 AlloyContentBrowserClient::CreateBrowserMainParts(
     bool /* is_integration_test */) {
diff --git a/libcef/browser/alloy/alloy_content_browser_client.h b/libcef/browser/alloy/alloy_content_browser_client.h
index 7fcf80978..1d0209d90 100644
--- a/libcef/browser/alloy/alloy_content_browser_client.h
+++ b/libcef/browser/alloy/alloy_content_browser_client.h
@@ -34,6 +34,8 @@ class AlloyContentBrowserClient : public content::ContentBrowserClient {
   AlloyContentBrowserClient();
   ~AlloyContentBrowserClient() override;
 
+  void CleanupOnUIThread();
+
   // ContentBrowserClient implementation.
   std::unique_ptr<content::BrowserMainParts> CreateBrowserMainParts(
       bool is_integration_test) override;
diff --git a/libcef/browser/alloy/chrome_browser_process_alloy.cc b/libcef/browser/alloy/chrome_browser_process_alloy.cc
index 00981ee39..bd2e66523 100644
--- a/libcef/browser/alloy/chrome_browser_process_alloy.cc
+++ b/libcef/browser/alloy/chrome_browser_process_alloy.cc
@@ -154,6 +154,7 @@ void ChromeBrowserProcessAlloy::CleanupOnUIThread() {
     }
   }
 
+  os_crypt_async_.reset();
   local_state_.reset();
   browser_policy_connector_.reset();
   background_printing_manager_.reset();
diff --git a/libcef/browser/browser_contents_delegate.cc b/libcef/browser/browser_contents_delegate.cc
index 39ab84865..6c3738e31 100644
--- a/libcef/browser/browser_contents_delegate.cc
+++ b/libcef/browser/browser_contents_delegate.cc
@@ -341,7 +341,7 @@ void CefBrowserContentsDelegate::RenderFrameCreated(
 void CefBrowserContentsDelegate::RenderFrameHostChanged(
     content::RenderFrameHost* old_host,
     content::RenderFrameHost* new_host) {
-  // Just in case RenderFrameCreated wasn't called for some reason.
+  // Update tracking for the RFH.
   RenderFrameCreated(new_host);
 }
 
@@ -494,6 +494,11 @@ void CefBrowserContentsDelegate::DidFinishNavigation(
     return;
   }
 
+  if (browser_info_->IsClosing()) {
+    // Ignore notifications when the browser is closing.
+    return;
+  }
+
   if (navigation_handle->IsInPrimaryMainFrame() &&
       navigation_handle->HasCommitted()) {
     // A primary main frame navigation has occured.
@@ -506,21 +511,15 @@ void CefBrowserContentsDelegate::DidFinishNavigation(
   const GURL& url =
       (error_code == net::OK ? navigation_handle->GetURL() : GURL());
 
-  auto browser_info = browser_info_;
-  if (!browser_info->browser()) {
-    // Ignore notifications when the browser is closing.
-    return;
-  }
-
   // May return NULL when starting a new navigation if the previous navigation
   // caused the renderer process to crash during load.
   CefRefPtr<CefFrameHostImpl> frame =
-      browser_info->GetFrameForGlobalId(global_id);
+      browser_info_->GetFrameForGlobalId(global_id);
   if (!frame) {
     if (is_main_frame) {
-      frame = browser_info->GetMainFrame();
+      frame = browser_info_->GetMainFrame();
     } else {
-      frame = browser_info->CreateTempSubFrame(frame_util::InvalidGlobalId());
+      frame = browser_info_->CreateTempSubFrame(frame_util::InvalidGlobalId());
     }
   }
   frame->RefreshAttributes();
diff --git a/libcef/browser/browser_context.cc b/libcef/browser/browser_context.cc
index 10e86dec4..be02e7db0 100644
--- a/libcef/browser/browser_context.cc
+++ b/libcef/browser/browser_context.cc
@@ -132,7 +132,7 @@ class ImplManager {
     return all_.end();
   }
 
-  using PathMap = std::map<base::FilePath, CefBrowserContext*>;
+  using PathMap = std::map<base::FilePath, raw_ptr<CefBrowserContext>>;
   PathMap map_;
 
   Vector all_;
@@ -419,12 +419,12 @@ CefRefPtr<CefRequestContextImpl> CefBrowserContext::GetAnyRequestContext(
   if (prefer_no_handler) {
     for (const auto& request_context : request_context_set_) {
       if (!request_context->GetHandler()) {
-        return request_context;
+        return request_context.get();
       }
     }
   }
 
-  return *request_context_set_.begin();
+  return request_context_set_.begin()->get();
 }
 
 CefBrowserContext::CookieableSchemes CefBrowserContext::GetCookieableSchemes()
diff --git a/libcef/browser/browser_context.h b/libcef/browser/browser_context.h
index 29ebcc301..71aafc912 100644
--- a/libcef/browser/browser_context.h
+++ b/libcef/browser/browser_context.h
@@ -235,7 +235,7 @@ class CefBrowserContext {
   std::unique_ptr<CefMediaRouterManager> media_router_manager_;
 
   // CefRequestContextImpl objects referencing this object.
-  std::set<CefRequestContextImpl*> request_context_set_;
+  std::set<raw_ptr<CefRequestContextImpl>> request_context_set_;
 
   // Map IDs to CefRequestContextHandler objects.
   CefRequestContextHandlerMap handler_map_;
diff --git a/libcef/browser/browser_host_base.cc b/libcef/browser/browser_host_base.cc
index a3a28145b..d4a486d22 100644
--- a/libcef/browser/browser_host_base.cc
+++ b/libcef/browser/browser_host_base.cc
@@ -262,17 +262,47 @@ void CefBrowserHostBase::InitializeBrowser() {
   WebContentsUserDataAdapter::Register(this);
 }
 
+void CefBrowserHostBase::DestroyWebContents(
+    content::WebContents* web_contents) {
+  CEF_REQUIRE_UIT();
+
+  // GetWebContents() should return nullptr at this point.
+  DCHECK(!GetWebContents());
+
+  // Notify that this browser has been destroyed. These must be delivered in
+  // the expected order.
+
+  // 1. Notify the platform delegate. With Views this will result in a call to
+  // CefBrowserViewDelegate::OnBrowserDestroyed().
+  platform_delegate_->NotifyBrowserDestroyed();
+
+  // 2. Notify the browser's LifeSpanHandler. This must always be the last
+  // notification for this browser.
+  OnBeforeClose();
+
+  // Notify any observers that may have state associated with this browser.
+  OnBrowserDestroyed();
+
+  // Free objects that may have references to the WebContents.
+  devtools_protocol_manager_.reset();
+  devtools_window_runner_.reset();
+  context_menu_observer_ = nullptr;
+
+  browser_info_->WebContentsDestroyed();
+  platform_delegate_->WebContentsDestroyed(web_contents);
+}
+
 void CefBrowserHostBase::DestroyBrowser() {
   CEF_REQUIRE_UIT();
 
-  devtools_protocol_manager_.reset();
-  devtools_window_runner_.reset();
+  // The WebContents should no longer be observed.
+  DCHECK(!contents_delegate_->web_contents());
+
   media_stream_registrar_.reset();
 
   platform_delegate_.reset();
 
   contents_delegate_->RemoveObserver(this);
-  contents_delegate_->ObserveWebContents(nullptr);
 
   if (unresponsive_process_callback_) {
     hang_monitor::Detach(unresponsive_process_callback_);
@@ -280,7 +310,7 @@ void CefBrowserHostBase::DestroyBrowser() {
   }
 
   CefBrowserInfoManager::GetInstance()->RemoveBrowserInfo(browser_info_);
-  browser_info_->SetBrowser(nullptr);
+  browser_info_->BrowserDestroyed();
 }
 
 CefRefPtr<CefBrowser> CefBrowserHostBase::GetBrowser() {
@@ -889,7 +919,7 @@ void CefBrowserHostBase::SendMouseWheelEvent(const CefMouseEvent& event,
 }
 
 bool CefBrowserHostBase::IsValid() {
-  return browser_info_->browser() == this;
+  return browser_info_->IsValid();
 }
 
 CefRefPtr<CefBrowserHost> CefBrowserHostBase::GetHost() {
diff --git a/libcef/browser/browser_host_base.h b/libcef/browser/browser_host_base.h
index b908fc3d0..7dfb5aae7 100644
--- a/libcef/browser/browser_host_base.h
+++ b/libcef/browser/browser_host_base.h
@@ -201,9 +201,32 @@ class CefBrowserHostBase : public CefBrowserHost,
   // the UI thread only.
   virtual bool WillBeDestroyed() const = 0;
 
-  // Called on the UI thread after the associated WebContents is destroyed.
-  // Also called from CefBrowserInfoManager::DestroyAllBrowsers if the browser
-  // was not properly shut down.
+  // Called on the UI thread to complete WebContents tear-down. In most cases
+  // this will be called via WebContentsObserver::WebContentsDestroyed. Any
+  // remaining objects that reference the WebContents (including RFH, etc)
+  // should be cleared in this callback.
+  virtual void DestroyWebContents(content::WebContents* web_contents);
+
+  // Called on the UI thread to complete CefBrowserHost tear-down.
+  //
+  // With Chrome style the WebContents is owned by the Browser's TabStripModel
+  // and will usually be destroyed first: CloseBrowser -> (async) DoCloseBrowser
+  // -> [TabStripModel deletes the WebContents] -> OnWebContentsDestroyed ->
+  // DestroyWebContents -> (async) DestroyBrowser.
+  //
+  // With Alloy style the WebContents is owned by the
+  // CefBrowserPlatformDelegateAlloy and will usually be destroyed at the same
+  // time: CloseBrowser -> [OS/platform logic] -> (async) DestroyBrowser ->
+  // [CefBrowserPlatformDelegateAlloy deletes the WebContents]
+  // -> WebContentsDestroyed -> DestoyWebContents.
+  //
+  // There are a few exceptions to the above rules:
+  // 1. If the CefBrowserHost still exists at CefShutdown, in which case
+  //    DestroyBrowser will be called first via
+  //    CefBrowserInfoManager::DestroyAllBrowsers.
+  // 2. If a popup WebContents is still pending when the parent WebContents is
+  //    destroyed, in which case WebContentsDestroyed will be called first via
+  //    the parent WebContents destructor.
   virtual void DestroyBrowser();
 
   // CefBrowserHost methods:
diff --git a/libcef/browser/browser_info.cc b/libcef/browser/browser_info.cc
index a4d1efe51..160d09f4e 100644
--- a/libcef/browser/browser_info.cc
+++ b/libcef/browser/browser_info.cc
@@ -55,43 +55,72 @@ CefBrowserInfo::~CefBrowserInfo() {
 
 CefRefPtr<CefBrowserHostBase> CefBrowserInfo::browser() const {
   base::AutoLock lock_scope(lock_);
-  if (!is_closing_) {
-    return browser_;
-  }
-  return nullptr;
+  return browser_;
+}
+
+bool CefBrowserInfo::IsValid() const {
+  base::AutoLock lock_scope(lock_);
+  return browser_ && !is_closing_;
+}
+
+bool CefBrowserInfo::IsClosing() const {
+  base::AutoLock lock_scope(lock_);
+  return is_closing_;
 }
 
 void CefBrowserInfo::SetBrowser(CefRefPtr<CefBrowserHostBase> browser) {
-  NotificationStateLock lock_scope(this);
+  base::AutoLock lock_scope(lock_);
+  DCHECK(browser);
+  DCHECK(!browser_);
 
-  if (browser) {
-    DCHECK(!browser_);
-
-    // Cache the associated frame handler.
-    if (auto client = browser->GetClient()) {
-      frame_handler_ = client->GetFrameHandler();
-    }
-  } else {
-    DCHECK(browser_);
-  }
-
-  auto old_browser = browser_;
   browser_ = browser;
 
-  if (!browser_) {
-    RemoveAllFrames(old_browser);
-
-    // Any future calls to MaybeExecuteFrameNotification will now fail.
-    // NotificationStateLock already took a reference for the delivery of any
-    // notifications that are currently queued due to RemoveAllFrames.
-    frame_handler_ = nullptr;
+  // Cache the associated frame handler.
+  if (auto client = browser->GetClient()) {
+    frame_handler_ = client->GetFrameHandler();
   }
 }
 
 void CefBrowserInfo::SetClosing() {
   base::AutoLock lock_scope(lock_);
-  DCHECK(!is_closing_);
-  is_closing_ = true;
+
+  // In most cases WebContentsDestroyed will be called first, except if the
+  // browser still exits at CefShitdown.
+  if (!is_closing_) {
+    is_closing_ = true;
+  }
+}
+
+void CefBrowserInfo::WebContentsDestroyed() {
+  NotificationStateLock lock_scope(this);
+
+  // Always called before BrowserDestroyed.
+  DCHECK(browser_);
+
+  // We want GetMainFrame() to return nullptr at this point, but browser()
+  // should still be valid so as not to interfere with the net_service
+  // DestructionObserver.
+  if (!is_closing_) {
+    is_closing_ = true;
+  }
+
+  RemoveAllFrames(browser_);
+
+  // Any future calls to MaybeExecuteFrameNotification will now fail.
+  // NotificationStateLock already took a reference for the delivery of any
+  // notifications that are currently queued due to RemoveAllFrames.
+  frame_handler_ = nullptr;
+}
+
+void CefBrowserInfo::BrowserDestroyed() {
+  base::AutoLock lock_scope(lock_);
+
+  // Always called after SetClosing and WebContentsDestroyed.
+  DCHECK(is_closing_);
+  DCHECK(frame_info_set_.empty());
+
+  DCHECK(browser_);
+  browser_ = nullptr;
 }
 
 void CefBrowserInfo::MaybeCreateFrame(content::RenderFrameHost* host) {
@@ -130,6 +159,9 @@ void CefBrowserInfo::MaybeCreateFrame(content::RenderFrameHost* host) {
     DCHECK_EQ(info->is_main_frame_, is_main_frame);
 #endif
 
+    // Update the associated RFH, which may have changed.
+    info->frame_->MaybeReAttach(this, host, /*require_detached=*/false);
+
     if (info->is_speculative_ && !is_speculative) {
       // Upgrade the frame info from speculative to non-speculative.
       if (info->is_main_frame_) {
@@ -142,7 +174,6 @@ void CefBrowserInfo::MaybeCreateFrame(content::RenderFrameHost* host) {
   }
 
   auto frame_info = new FrameInfo;
-  frame_info->host_ = host;
   frame_info->global_id_ = global_id;
   frame_info->is_main_frame_ = is_main_frame;
   frame_info->is_speculative_ = is_speculative;
@@ -183,7 +214,7 @@ void CefBrowserInfo::FrameHostStateChanged(
       new_state == content::RenderFrameHost::LifecycleState::kActive) {
     if (auto frame = GetFrameForHost(host)) {
       // Update the associated RFH, which may have changed.
-      frame->MaybeReAttach(this, host);
+      frame->MaybeReAttach(this, host, /*require_detached=*/true);
 
       if (frame->IsMain()) {
         // Update the main frame object.
@@ -519,8 +550,7 @@ void CefBrowserInfo::RemoveAllFrames(
   // Make sure any callbacks will see the correct state (e.g. like
   // CefBrowser::GetMainFrame returning nullptr and CefBrowser::IsValid
   // returning false).
-  DCHECK(!browser_);
-  DCHECK(old_browser);
+  DCHECK(is_closing_);
 
   // Clear the lookup maps.
   frame_id_map_.clear();
diff --git a/libcef/browser/browser_info.h b/libcef/browser/browser_info.h
index 559aaf3ab..5b76574dd 100644
--- a/libcef/browser/browser_info.h
+++ b/libcef/browser/browser_info.h
@@ -49,21 +49,30 @@ class CefBrowserInfo : public base::RefCountedThreadSafe<CefBrowserInfo> {
   bool print_preview_enabled() const { return print_preview_enabled_; }
   CefRefPtr<CefDictionaryValue> extra_info() const { return extra_info_; }
 
-  // May return NULL if the browser has not yet been created or if the browser
-  // has been destroyed.
+  // May return nullptr if the browser has not yet been created (before
+  // SetBrowser) or if the browser has been destroyed (after BrowserDestroyed).
   CefRefPtr<CefBrowserHostBase> browser() const;
 
-  // Set or clear the browser. Called from CefBrowserHostBase InitializeBrowser
-  // (to set) and DestroyBrowser (to clear).
+  // Returns true if the browser has been created (after SetBrowser) and is not
+  // yet closing (before SetClosing or WebContentsDestroyed).
+  bool IsValid() const;
+
+  // Returns true if the browser is closing (after SetClosing or
+  // WebContentsDestroyed).
+  bool IsClosing() const;
+
+  // Called from CefBrowserHostBase constructor.
   void SetBrowser(CefRefPtr<CefBrowserHostBase> browser);
 
-  // Called after OnBeforeClose and before SetBrowser(nullptr). This will cause
-  // browser() and GetMainFrame() to return nullptr as expected by
-  // CefFrameHandler callbacks. Note that this differs from calling
-  // SetBrowser(nullptr) because the WebContents has not yet been destroyed and
-  // further frame-related callbacks are expected.
+  // Called from CefBrowserHostBase::OnBeforeClose.
   void SetClosing();
 
+  // Called from CefBrowserHostBase::DestroyWebContents.
+  void WebContentsDestroyed();
+
+  // Called from CefBrowserHostBase::DestroyBrowser.
+  void BrowserDestroyed();
+
   // Ensure that a frame record exists for |host|. Called for the main frame
   // when the RenderView is created, or for a sub-frame when the associated
   // RenderFrame is created in the renderer process.
@@ -170,7 +179,6 @@ class CefBrowserInfo : public base::RefCountedThreadSafe<CefBrowserInfo> {
       return frame_ && is_main_frame_ && !is_speculative_ && !is_in_bfcache_;
     }
 
-    raw_ptr<content::RenderFrameHost> host_;
     content::GlobalRenderFrameHostId global_id_;
     bool is_main_frame_;
     bool is_speculative_;
diff --git a/libcef/browser/chrome/chrome_browser_context.cc b/libcef/browser/chrome/chrome_browser_context.cc
index 2cc97f62e..2fbbdc7d8 100644
--- a/libcef/browser/chrome/chrome_browser_context.cc
+++ b/libcef/browser/chrome/chrome_browser_context.cc
@@ -133,7 +133,8 @@ void ChromeBrowserContext::Shutdown() {
   // |g_browser_process| may be nullptr during shutdown.
   if (g_browser_process) {
     if (should_destroy_) {
-      GetPrimaryUserProfile()->DestroyOffTheRecordProfile(profile_);
+      GetPrimaryUserProfile()->DestroyOffTheRecordProfile(
+          profile_.ExtractAsDangling());
     } else if (profile_) {
       OnProfileWillBeDestroyed(profile_);
     }
diff --git a/libcef/browser/chrome/chrome_browser_host_impl.cc b/libcef/browser/chrome/chrome_browser_host_impl.cc
index 426e28416..8e22411ab 100644
--- a/libcef/browser/chrome/chrome_browser_host_impl.cc
+++ b/libcef/browser/chrome/chrome_browser_host_impl.cc
@@ -146,16 +146,9 @@ void ChromeBrowserHostImpl::AddNewContents(
 
 void ChromeBrowserHostImpl::OnWebContentsDestroyed(
     content::WebContents* web_contents) {
-  // GetWebContents() should return nullptr at this point.
-  DCHECK(!GetWebContents());
-
-  // In most cases WebContents destruction will trigger browser destruction.
-  // The exception is if the browser still exists at CefShutdown, in which
-  // case DestroyBrowser() will be called first via
-  // CefBrowserInfoManager::DestroyAllBrowsers().
-  if (platform_delegate_) {
-    platform_delegate_->WebContentsDestroyed(web_contents);
+  DestroyWebContents(web_contents);
 
+  if (!is_destroying_browser_) {
     // Destroy the browser asynchronously to allow the current call stack
     // to unwind (we may have been called via the TabStripModel owned by the
     // Browser).
@@ -568,24 +561,14 @@ bool ChromeBrowserHostImpl::WillBeDestroyed() const {
 void ChromeBrowserHostImpl::DestroyBrowser() {
   CEF_REQUIRE_UIT();
 
-  // Notify that this browser has been destroyed. These must be delivered in
-  // the expected order.
+  is_destroying_browser_ = true;
 
-  // 1. Notify the platform delegate. With Views this will result in a call to
-  // CefBrowserViewDelegate::OnBrowserDestroyed().
-  platform_delegate_->NotifyBrowserDestroyed();
-
-  // 2. Notify the browser's LifeSpanHandler. This must always be the last
-  // notification for this browser.
-  OnBeforeClose();
-
-  // Notify any observers that may have state associated with this browser.
-  OnBrowserDestroyed();
-
-  // If the WebContents still exists at this point, signal destruction before
-  // browser destruction.
-  if (auto web_contents = GetWebContents()) {
-    platform_delegate_->WebContentsDestroyed(web_contents);
+  // If the WebContents still exists at this point, close the Browser and
+  // WebContents first. See comments on CefBrowserHostBase::DestroyBrowser.
+  if (GetWebContents()) {
+    // Triggers a call to OnWebContentsDestroyed.
+    DoCloseBrowser(/*force_close=*/true);
+    DCHECK(!GetWebContents());
   }
 
   // Disassociate the platform delegate from this browser.
@@ -604,6 +587,7 @@ void ChromeBrowserHostImpl::DoCloseBrowser(bool force_close) {
     // Like chrome::CloseTab() but specifying the WebContents.
     const int tab_index = GetCurrentTabIndex();
     if (tab_index != TabStripModel::kNoTab) {
+      // This will trigger destruction of the Browser and WebContents.
       // TODO(chrome): Handle the case where this method returns false,
       // indicating that the contents were not closed immediately.
       browser_->tab_strip_model()->CloseWebContentsAt(
diff --git a/libcef/browser/chrome/chrome_browser_host_impl.h b/libcef/browser/chrome/chrome_browser_host_impl.h
index f8566142b..95817e7e9 100644
--- a/libcef/browser/chrome/chrome_browser_host_impl.h
+++ b/libcef/browser/chrome/chrome_browser_host_impl.h
@@ -177,6 +177,7 @@ class ChromeBrowserHostImpl : public CefBrowserHostBase {
 
   raw_ptr<Browser> browser_ = nullptr;
   CefWindowHandle host_window_handle_ = kNullWindowHandle;
+  bool is_destroying_browser_ = false;
 
   base::WeakPtrFactory<ChromeBrowserHostImpl> weak_ptr_factory_{this};
 };
diff --git a/libcef/browser/chrome/chrome_content_browser_client_cef.cc b/libcef/browser/chrome/chrome_content_browser_client_cef.cc
index 60ae18c9d..56df06933 100644
--- a/libcef/browser/chrome/chrome_content_browser_client_cef.cc
+++ b/libcef/browser/chrome/chrome_content_browser_client_cef.cc
@@ -84,6 +84,11 @@ void HandleExternalProtocolHelper(
 ChromeContentBrowserClientCef::ChromeContentBrowserClientCef() = default;
 ChromeContentBrowserClientCef::~ChromeContentBrowserClientCef() = default;
 
+void ChromeContentBrowserClientCef::CleanupOnUIThread() {
+  browser_main_parts_ = nullptr;
+  ChromeContentBrowserClient::CleanupOnUIThread();
+}
+
 std::unique_ptr<content::BrowserMainParts>
 ChromeContentBrowserClientCef::CreateBrowserMainParts(
     bool is_integration_test) {
diff --git a/libcef/browser/chrome/chrome_content_browser_client_cef.h b/libcef/browser/chrome/chrome_content_browser_client_cef.h
index 1622ede5f..ad04adf4b 100644
--- a/libcef/browser/chrome/chrome_content_browser_client_cef.h
+++ b/libcef/browser/chrome/chrome_content_browser_client_cef.h
@@ -26,6 +26,8 @@ class ChromeContentBrowserClientCef : public ChromeContentBrowserClient {
 
   ~ChromeContentBrowserClientCef() override;
 
+  void CleanupOnUIThread() override;
+
   // ChromeContentBrowserClient overrides.
   std::unique_ptr<content::BrowserMainParts> CreateBrowserMainParts(
       bool is_integration_test) override;
diff --git a/libcef/browser/chrome/views/chrome_browser_frame.cc b/libcef/browser/chrome/views/chrome_browser_frame.cc
index d7513a199..346e90828 100644
--- a/libcef/browser/chrome/views/chrome_browser_frame.cc
+++ b/libcef/browser/chrome/views/chrome_browser_frame.cc
@@ -31,11 +31,10 @@ void ChromeBrowserFrame::Init(BrowserView* browser_view,
   DCHECK(browser_view);
   DCHECK(browser);
 
-  DCHECK(!browser_view_);
-  browser_view_ = browser_view;
+  DCHECK(!BrowserFrame::browser_view());
 
   // Initialize BrowserFrame state.
-  InitBrowserView(browser_view);
+  SetBrowserView(browser_view);
 
   // Initialize BrowserView state.
   browser_view->InitBrowser(std::move(browser));
@@ -73,7 +72,7 @@ void ChromeBrowserFrame::AddAssociatedProfile(Profile* profile) {
 
   // Always call ThemeChanged() when the Chrome style BrowserView is added.
   bool call_theme_changed =
-      browser_view_ && browser_view_->GetProfile() == profile;
+      browser_view() && browser_view()->GetProfile() == profile;
 
   ProfileMap::iterator it = associated_profiles_.find(profile);
   if (it != associated_profiles_.end()) {
@@ -127,8 +126,8 @@ void ChromeBrowserFrame::RemoveAssociatedProfile(Profile* profile) {
 
 Profile* ChromeBrowserFrame::GetThemeProfile() const {
   // Always prefer the Browser Profile, if any.
-  if (browser_view_) {
-    return browser_view_->GetProfile();
+  if (browser_view()) {
+    return browser_view()->GetProfile();
   }
   if (!associated_profiles_.empty()) {
     return associated_profiles_.begin()->first;
@@ -137,9 +136,9 @@ Profile* ChromeBrowserFrame::GetThemeProfile() const {
 }
 
 bool ChromeBrowserFrame::ToggleFullscreenMode() {
-  if (browser_view_) {
+  if (browser_view()) {
     // Toggle fullscreen mode via the Chrome command for consistent behavior.
-    chrome::ToggleFullscreenMode(browser_view_->browser());
+    chrome::ToggleFullscreenMode(browser_view()->browser());
     return true;
   }
   return false;
@@ -167,10 +166,10 @@ ChromeBrowserFrame::CreateNonClientFrameView() {
 }
 
 void ChromeBrowserFrame::Activate() {
-  if (browser_view_ && browser_view_->browser() &&
-      browser_view_->browser()->is_type_devtools()) {
+  if (browser_view() && browser_view()->browser() &&
+      browser_view()->browser()->is_type_devtools()) {
     if (auto browser_host = ChromeBrowserHostImpl::GetBrowserForBrowser(
-            browser_view_->browser())) {
+            browser_view()->browser())) {
       if (browser_host->platform_delegate()->HasExternalParent()) {
         // Handle activation of DevTools with external parent via the platform
         // delegate. On Windows the default platform implementation
@@ -189,6 +188,7 @@ void ChromeBrowserFrame::Activate() {
 
 void ChromeBrowserFrame::OnNativeWidgetDestroyed() {
   window_view_ = nullptr;
+  SetBrowserView(nullptr);
   BrowserFrame::OnNativeWidgetDestroyed();
 }
 
@@ -207,7 +207,7 @@ void ChromeBrowserFrame::OnNativeThemeUpdated(ui::NativeTheme* observed_theme) {
 }
 
 ui::ColorProviderKey ChromeBrowserFrame::GetColorProviderKey() const {
-  if (browser_view_) {
+  if (browser_view()) {
     // Use the default Browser implementation.
     return BrowserFrame::GetColorProviderKey();
   }
@@ -220,7 +220,7 @@ ui::ColorProviderKey ChromeBrowserFrame::GetColorProviderKey() const {
 }
 
 void ChromeBrowserFrame::OnThemeChanged() {
-  if (browser_view_) {
+  if (browser_view()) {
     // Ignore these notifications if we have a Browser.
     return;
   }
diff --git a/libcef/browser/chrome/views/chrome_browser_frame.h b/libcef/browser/chrome/views/chrome_browser_frame.h
index 4d6ebfa80..d1f728295 100644
--- a/libcef/browser/chrome/views/chrome_browser_frame.h
+++ b/libcef/browser/chrome/views/chrome_browser_frame.h
@@ -141,8 +141,6 @@ class ChromeBrowserFrame : public BrowserFrame,
   // ThemeServiceObserver methods:
   void OnThemeChanged() override;
 
-  BrowserView* browser_view() const { return browser_view_; }
-
  private:
   // CefColorProviderTracker::Observer methods:
   void OnColorProviderCacheResetMissed() override;
@@ -150,13 +148,12 @@ class ChromeBrowserFrame : public BrowserFrame,
   void NotifyThemeColorsChanged(bool chrome_theme);
 
   raw_ptr<CefWindowView> window_view_;
-  raw_ptr<BrowserView> browser_view_ = nullptr;
 
   bool initialized_ = false;
   bool native_theme_change_ = false;
 
   // Map of Profile* to count.
-  using ProfileMap = std::map<Profile*, size_t>;
+  using ProfileMap = std::map<raw_ptr<Profile>, size_t>;
   ProfileMap associated_profiles_;
 
   CefColorProviderTracker color_provider_tracker_{this};
diff --git a/libcef/browser/chrome/views/chrome_browser_view.cc b/libcef/browser/chrome/views/chrome_browser_view.cc
index e4b61ea6c..b6a3b5889 100644
--- a/libcef/browser/chrome/views/chrome_browser_view.cc
+++ b/libcef/browser/chrome/views/chrome_browser_view.cc
@@ -100,3 +100,11 @@ ToolbarView* ChromeBrowserView::OverrideCreateToolbar() {
 
   return nullptr;
 }
+
+void ChromeBrowserView::WillDestroyToolbar() {
+  BrowserView::WillDestroyToolbar();
+  if (cef_toolbar_) {
+    cef_toolbar_->Destroyed();
+    cef_toolbar_ = nullptr;
+  }
+}
diff --git a/libcef/browser/chrome/views/chrome_browser_view.h b/libcef/browser/chrome/views/chrome_browser_view.h
index 56d36f4bd..36899d2ba 100644
--- a/libcef/browser/chrome/views/chrome_browser_view.h
+++ b/libcef/browser/chrome/views/chrome_browser_view.h
@@ -48,6 +48,7 @@ class ChromeBrowserView
 
   // BrowserView methods:
   ToolbarView* OverrideCreateToolbar() override;
+  void WillDestroyToolbar() override;
 
   CefRefPtr<CefToolbarViewImpl> cef_toolbar() const { return cef_toolbar_; }
   CefBrowserViewImpl* cef_browser_view() const { return cef_browser_view_; }
diff --git a/libcef/browser/chrome/views/toolbar_view_impl.cc b/libcef/browser/chrome/views/toolbar_view_impl.cc
index 48938b53b..a9869c422 100644
--- a/libcef/browser/chrome/views/toolbar_view_impl.cc
+++ b/libcef/browser/chrome/views/toolbar_view_impl.cc
@@ -30,6 +30,11 @@ CefToolbarViewImpl::CefToolbarViewImpl(
       browser_view_(browser_view),
       display_mode_(display_mode) {}
 
+void CefToolbarViewImpl::Destroyed() {
+  browser_ = nullptr;
+  browser_view_ = nullptr;
+}
+
 CefToolbarViewView* CefToolbarViewImpl::CreateRootView() {
   return new CefToolbarViewView(delegate(), browser_, browser_view_,
                                 display_mode_);
diff --git a/libcef/browser/chrome/views/toolbar_view_impl.h b/libcef/browser/chrome/views/toolbar_view_impl.h
index 9b3f19acb..437b648f5 100644
--- a/libcef/browser/chrome/views/toolbar_view_impl.h
+++ b/libcef/browser/chrome/views/toolbar_view_impl.h
@@ -22,6 +22,8 @@ class CefToolbarViewImpl
   CefToolbarViewImpl(const CefToolbarViewImpl&) = delete;
   CefToolbarViewImpl& operator=(const CefToolbarViewImpl&) = delete;
 
+  void Destroyed();
+
   // Create a new CefToolbarViewImpl instance. |delegate| may be nullptr.
   static CefRefPtr<CefToolbarViewImpl> Create(
       CefRefPtr<CefViewDelegate> delegate,
@@ -47,8 +49,8 @@ class CefToolbarViewImpl
   CefToolbarViewView* CreateRootView() override;
   void InitializeRootView() override;
 
-  const raw_ptr<Browser> browser_;
-  const raw_ptr<BrowserView> browser_view_;
+  raw_ptr<Browser> browser_;
+  raw_ptr<BrowserView> browser_view_;
   std::optional<ToolbarView::DisplayMode> const display_mode_;
 
   IMPLEMENT_REFCOUNTING_DELETE_ON_UIT(CefToolbarViewImpl);
diff --git a/libcef/browser/download_manager_delegate_impl.cc b/libcef/browser/download_manager_delegate_impl.cc
index e993febcb..cea133cb2 100644
--- a/libcef/browser/download_manager_delegate_impl.cc
+++ b/libcef/browser/download_manager_delegate_impl.cc
@@ -438,7 +438,7 @@ CefDownloadManagerDelegateImpl::GetOrAssociateBrowser(
     download::DownloadItem* item) {
   ItemBrowserMap::const_iterator it = item_browser_map_.find(item);
   if (it != item_browser_map_.end()) {
-    return it->second;
+    return it->second.get();
   }
 
   CefRefPtr<CefBrowserHostBase> browser;
@@ -469,7 +469,7 @@ CefRefPtr<CefBrowserHostBase> CefDownloadManagerDelegateImpl::GetBrowser(
     DownloadItem* item) {
   ItemBrowserMap::const_iterator it = item_browser_map_.find(item);
   if (it != item_browser_map_.end()) {
-    return it->second;
+    return it->second.get();
   }
 
   // If the download is rejected (e.g. ALT+click on an invalid protocol link)
diff --git a/libcef/browser/download_manager_delegate_impl.h b/libcef/browser/download_manager_delegate_impl.h
index 8cafd725e..56390e057 100644
--- a/libcef/browser/download_manager_delegate_impl.h
+++ b/libcef/browser/download_manager_delegate_impl.h
@@ -65,7 +65,8 @@ class CefDownloadManagerDelegateImpl
   // Map of DownloadItem to originating CefBrowserHostBase. Maintaining this
   // map is necessary because DownloadItem::GetWebContents() may return NULL if
   // the browser navigates while the download is in progress.
-  using ItemBrowserMap = std::map<download::DownloadItem*, CefBrowserHostBase*>;
+  using ItemBrowserMap =
+      std::map<raw_ptr<download::DownloadItem>, raw_ptr<CefBrowserHostBase>>;
   ItemBrowserMap item_browser_map_;
 };
 
diff --git a/libcef/browser/extensions/extension_system.cc b/libcef/browser/extensions/extension_system.cc
index 67010ead3..7a89a909f 100644
--- a/libcef/browser/extensions/extension_system.cc
+++ b/libcef/browser/extensions/extension_system.cc
@@ -255,9 +255,7 @@ void CefExtensionSystem::Init() {
   //    any, are handled in the guest renderer process by ChromePDFPrintClient
   //    and CefPrintRenderFrameHelperDelegate.
   // 20.When navigating away from the PDF file or closing the owner CefBrowser
-  //    the guest WebContents will be destroyed. This triggers a call to
-  //    CefMimeHandlerViewGuestDelegate::OnGuestDetached which removes the
-  //    routing ID association with the owner CefBrowser.
+  //    the guest WebContents will be destroyed.
   if (PdfExtensionEnabled()) {
     if (auto manifest = ParseManifest(pdf_extension_util::GetManifest())) {
       LoadExtension(std::move(*manifest),
@@ -392,6 +390,7 @@ void CefExtensionSystem::Shutdown() {
     DCHECK(!cef_extension->loader_context());
   }
 #endif
+  renderer_helper_ = nullptr;
   extension_map_.clear();
 }
 
diff --git a/libcef/browser/extensions/value_store/cef_value_store_factory.h b/libcef/browser/extensions/value_store/cef_value_store_factory.h
index d713af26f..eeede5418 100644
--- a/libcef/browser/extensions/value_store/cef_value_store_factory.h
+++ b/libcef/browser/extensions/value_store/cef_value_store_factory.h
@@ -49,7 +49,8 @@ class CefValueStoreFactory : public ValueStoreFactory {
   std::unique_ptr<ValueStore> CreateStore();
 
   base::FilePath db_path_;
-  raw_ptr<ValueStore> last_created_store_ = nullptr;
+  raw_ptr<ValueStore, AcrossTasksDanglingUntriaged> last_created_store_ =
+      nullptr;
 
   // A mapping from directories to their ValueStore. None of these value
   // stores are owned by this factory, so care must be taken when calling
diff --git a/libcef/browser/file_dialog_manager.cc b/libcef/browser/file_dialog_manager.cc
index fe2717d89..b94260af7 100644
--- a/libcef/browser/file_dialog_manager.cc
+++ b/libcef/browser/file_dialog_manager.cc
@@ -230,7 +230,7 @@ class CefSelectFileDialogListener : public ui::SelectFileDialog::Listener {
                     void* params) override {
     DCHECK_EQ(params, params_);
     executing_ = true;
-    listener_->FileSelected(file, index, params);
+    listener_.ExtractAsDangling()->FileSelected(file, index, params);
     Destroy();
   }
 
@@ -238,14 +238,14 @@ class CefSelectFileDialogListener : public ui::SelectFileDialog::Listener {
                           void* params) override {
     DCHECK_EQ(params, params_);
     executing_ = true;
-    listener_->MultiFilesSelected(files, params);
+    listener_.ExtractAsDangling()->MultiFilesSelected(files, params);
     Destroy();
   }
 
   void FileSelectionCanceled(void* params) override {
     DCHECK_EQ(params, params_);
     executing_ = true;
-    listener_->FileSelectionCanceled(params);
+    listener_.ExtractAsDangling()->FileSelectionCanceled(params);
     Destroy();
   }
 
@@ -254,7 +254,7 @@ class CefSelectFileDialogListener : public ui::SelectFileDialog::Listener {
     delete this;
   }
 
-  const raw_ptr<ui::SelectFileDialog::Listener> listener_;
+  raw_ptr<ui::SelectFileDialog::Listener> listener_;
   const raw_ptr<void> params_;
   base::OnceClosure callback_;
 
diff --git a/libcef/browser/file_dialog_manager.h b/libcef/browser/file_dialog_manager.h
index 2254b679d..78ee27fa0 100644
--- a/libcef/browser/file_dialog_manager.h
+++ b/libcef/browser/file_dialog_manager.h
@@ -91,7 +91,7 @@ class CefFileDialogManager {
   raw_ptr<CefSelectFileDialogListener> dialog_listener_ = nullptr;
 
   // List of all currently active listeners.
-  std::set<ui::SelectFileDialog::Listener*> active_listeners_;
+  std::set<raw_ptr<ui::SelectFileDialog::Listener>> active_listeners_;
 
   base::WeakPtrFactory<CefFileDialogManager> weak_ptr_factory_{this};
 };
diff --git a/libcef/browser/frame_host_impl.cc b/libcef/browser/frame_host_impl.cc
index 7fc38dade..b2e6273a7 100644
--- a/libcef/browser/frame_host_impl.cc
+++ b/libcef/browser/frame_host_impl.cc
@@ -521,7 +521,7 @@ bool CefFrameHostImpl::Detach(DetachReason reason) {
   bool first_detach = false;
 
   // Should not be called for temporary frames.
-  DCHECK(!is_temporary());
+  CHECK(!is_temporary());
 
   {
     base::AutoLock lock_scope(state_lock_);
@@ -548,17 +548,32 @@ bool CefFrameHostImpl::Detach(DetachReason reason) {
 
 void CefFrameHostImpl::MaybeReAttach(
     scoped_refptr<CefBrowserInfo> browser_info,
-    content::RenderFrameHost* render_frame_host) {
+    content::RenderFrameHost* render_frame_host,
+    bool require_detached) {
   CEF_REQUIRE_UIT();
   if (render_frame_.is_bound() && render_frame_host_ == render_frame_host) {
     // Nothing to do here.
     return;
   }
 
-  // We expect that Detach() was called previously.
+  // Should not be called for temporary frames.
   CHECK(!is_temporary());
-  CHECK(!render_frame_.is_bound());
-  CHECK(!render_frame_host_);
+
+  if (require_detached) {
+    // We expect that Detach() was called previously.
+    CHECK(!render_frame_.is_bound());
+    CHECK(!render_frame_host_);
+  } else if (render_frame_host_) {
+    // Intentionally not clearing |queued_renderer_actions_|, as we may be
+    // changing RFH during initial browser navigation.
+    VLOG(1) << GetDebugString()
+            << " detached (reason=RENDER_FRAME_CHANGED, is_connected="
+            << render_frame_.is_bound() << ")";
+    if (render_frame_.is_bound()) {
+      render_frame_->FrameDetached();
+    }
+    render_frame_.reset();
+  }
 
   // The RFH may change but the frame token should remain the same.
   CHECK(*frame_token_ == render_frame_host->GetGlobalFrameToken());
diff --git a/libcef/browser/frame_host_impl.h b/libcef/browser/frame_host_impl.h
index 0fb3306a4..f1c18c6bc 100644
--- a/libcef/browser/frame_host_impl.h
+++ b/libcef/browser/frame_host_impl.h
@@ -144,7 +144,8 @@ class CefFrameHostImpl : public CefFrame, public cef::mojom::BrowserFrame {
   // cache. We may need to re-attach if the RFH has changed. See
   // https://crbug.com/1179502#c8 for additional background.
   void MaybeReAttach(scoped_refptr<CefBrowserInfo> browser_info,
-                     content::RenderFrameHost* render_frame_host);
+                     content::RenderFrameHost* render_frame_host,
+                     bool require_detached);
 
   // cef::mojom::BrowserFrame methods forwarded from CefBrowserFrame.
   void SendMessage(const std::string& name,
diff --git a/libcef/browser/net_service/proxy_url_loader_factory.cc b/libcef/browser/net_service/proxy_url_loader_factory.cc
index 24881c47a..dcdad0639 100644
--- a/libcef/browser/net_service/proxy_url_loader_factory.cc
+++ b/libcef/browser/net_service/proxy_url_loader_factory.cc
@@ -233,7 +233,7 @@ class InterceptedRequest : public network::mojom::URLLoader,
       mojo::PendingReceiver<network::mojom::TrustedHeaderClient> receiver);
 
   // Called from InterceptDelegate::OnInputStreamOpenFailed.
-  void InputStreamFailed(bool restart_needed);
+  bool InputStreamFailed();
 
   // mojom::TrustedHeaderClient methods:
   void OnBeforeSendHeaders(const net::HttpRequestHeaders& headers,
@@ -328,7 +328,6 @@ class InterceptedRequest : public network::mojom::URLLoader,
   const raw_ptr<ProxyURLLoaderFactory> factory_;
   const int32_t id_;
   const uint32_t options_;
-  bool input_stream_previously_failed_ = false;
   bool request_was_redirected_ = false;
   int redirect_limit_ = net::URLRequest::kMaxRedirects;
   bool redirect_in_progress_ = false;
@@ -374,7 +373,7 @@ class InterceptedRequest : public network::mojom::URLLoader,
   mojo::Receiver<network::mojom::TrustedHeaderClient> header_client_receiver_{
       this};
 
-  raw_ptr<StreamReaderURLLoader> stream_loader_ = nullptr;
+  std::unique_ptr<StreamReaderURLLoader> stream_loader_;
 
   base::WeakPtrFactory<InterceptedRequest> weak_factory_;
 };
@@ -391,9 +390,8 @@ class InterceptDelegate : public StreamReaderURLLoader::Delegate {
     return response_->OpenInputStream(request_id, request, std::move(callback));
   }
 
-  void OnInputStreamOpenFailed(int32_t request_id, bool* restarted) override {
-    request_->InputStreamFailed(false /* restart_needed */);
-    *restarted = false;
+  bool OnInputStreamOpenFailed(int32_t request_id) override {
+    return request_->InputStreamFailed();
   }
 
   void GetResponseHeaders(int32_t request_id,
@@ -456,7 +454,11 @@ InterceptedRequest::~InterceptedRequest() {
 }
 
 void InterceptedRequest::Restart() {
-  stream_loader_ = nullptr;
+  // May exist if the previous stream resulted in a redirect.
+  if (stream_loader_) {
+    stream_loader_.reset();
+  }
+
   if (proxied_client_receiver_.is_bound()) {
     proxied_client_receiver_.reset();
     target_loader_.reset();
@@ -555,24 +557,16 @@ void InterceptedRequest::OnLoaderCreated(
   header_client_receiver_.Bind(std::move(receiver));
 }
 
-void InterceptedRequest::InputStreamFailed(bool restart_needed) {
-  DCHECK(!input_stream_previously_failed_);
-
+bool InterceptedRequest::InputStreamFailed() {
   if (intercept_only_) {
     // This can happen for unsupported schemes, when no proper
     // response from the intercept handler is received, i.e.
     // the provided input stream in response failed to load. In
     // this case we send and error and stop loading.
     SendErrorAndCompleteImmediately(net::ERR_UNKNOWN_URL_SCHEME);
-    return;
+    return true;
   }
-
-  if (!restart_needed) {
-    return;
-  }
-
-  input_stream_previously_failed_ = true;
-  Restart();
+  return false;
 }
 
 // TrustedHeaderClient methods.
@@ -791,7 +785,7 @@ void InterceptedRequest::BeforeRequestReceived(const GURL& original_url,
   intercept_request_ = intercept_request;
   intercept_only_ = intercept_only;
 
-  if (input_stream_previously_failed_ || !intercept_request_) {
+  if (!intercept_request_) {
     // Equivalent to no interception.
     InterceptResponseReceived(original_url, nullptr);
   } else {
@@ -894,7 +888,8 @@ void InterceptedRequest::ContinueAfterInterceptWithOverride(
   // avoid having Set-Cookie headers stripped by the IPC layer.
   current_request_uses_header_client_ = true;
 
-  stream_loader_ = new StreamReaderURLLoader(
+  DCHECK(!stream_loader_);
+  stream_loader_ = std::make_unique<StreamReaderURLLoader>(
       id_, request_, proxied_client_receiver_.BindNewPipeAndPassRemote(),
       header_client_receiver_.BindNewPipeAndPassRemote(), traffic_annotation_,
       std::move(current_cached_metadata_),
@@ -1092,6 +1087,9 @@ void InterceptedRequest::ContinueToResponseStarted(int error_code) {
   const bool is_redirect =
       redirect_url.is_valid() || (headers && headers->IsRedirect(&location));
   if (stream_loader_ && is_redirect) {
+    // Don't continue reading from the stream loader.
+    stream_loader_->Cancel();
+
     // Redirecting from OnReceiveResponse generally isn't supported by the
     // NetworkService, so we can only support it when using a custom loader.
     // TODO(network): Remove this special case.
@@ -1126,6 +1124,9 @@ void InterceptedRequest::ContinueToResponseStarted(int error_code) {
       if (!result.has_value() &&
           !HasCrossOriginWhitelistEntry(*request_.request_initiator,
                                         url::Origin::Create(request_.url))) {
+        // Don't continue reading from the stream loader.
+        stream_loader_->Cancel();
+
         SendErrorStatusAndCompleteImmediately(
             network::URLLoaderCompletionStatus(result.error()));
         return;
@@ -1138,6 +1139,11 @@ void InterceptedRequest::ContinueToResponseStarted(int error_code) {
       proxied_client_receiver_.Resume();
     }
 
+    if (stream_loader_) {
+      // Continue reading from the stream loader.
+      stream_loader_->Continue();
+    }
+
     target_client_->OnReceiveResponse(
         std::move(current_response_),
         factory_->request_handler_->OnFilterResponseBody(
diff --git a/libcef/browser/net_service/stream_reader_url_loader.cc b/libcef/browser/net_service/stream_reader_url_loader.cc
index 8c2afb1cd..77650d8b5 100644
--- a/libcef/browser/net_service/stream_reader_url_loader.cc
+++ b/libcef/browser/net_service/stream_reader_url_loader.cc
@@ -523,6 +523,29 @@ void StreamReaderURLLoader::Start() {
   }
 }
 
+void StreamReaderURLLoader::Continue() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  DCHECK(need_client_callback_ && !got_client_callback_);
+  got_client_callback_ = true;
+
+  writable_handle_watcher_.Watch(
+      producer_handle_.get(), MOJO_HANDLE_SIGNAL_WRITABLE,
+      base::BindRepeating(&StreamReaderURLLoader::OnDataPipeWritable,
+                          base::Unretained(this)));
+
+  ReadMore();
+}
+
+void StreamReaderURLLoader::Cancel() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  DCHECK(need_client_callback_ && !got_client_callback_);
+  got_client_callback_ = true;
+
+  CleanUp();
+}
+
 void StreamReaderURLLoader::ContinueWithRequestHeaders(
     int32_t result,
     const std::optional<net::HttpRequestHeaders>& headers) {
@@ -571,13 +594,8 @@ void StreamReaderURLLoader::OnInputStreamOpened(
   open_cancel_callback_.Reset();
 
   if (!input_stream) {
-    bool restarted = false;
-    response_delegate_->OnInputStreamOpenFailed(request_id_, &restarted);
-    if (restarted) {
-      // The request has been restarted with a new loader.
-      // |this| will be deleted.
-      CleanUp();
-    } else {
+    // May delete |this| iff returns true.
+    if (!response_delegate_->OnInputStreamOpenFailed(request_id_)) {
       HeadersComplete(net::HTTP_NOT_FOUND, -1);
     }
     return;
@@ -700,13 +718,15 @@ void StreamReaderURLLoader::ContinueWithResponseHeaders(
     pending_response->encoded_body_length = nullptr;
     const GURL new_location =
         has_redirect_url ? *redirect_url : request_.url.Resolve(location);
+
+    CleanUp();
+
+    // The client will restart the request with a new loader.
+    // May delete |this|.
     client_->OnReceiveRedirect(
         MakeRedirectInfo(request_, pending_headers.get(), new_location,
                          pending_headers->response_code()),
         std::move(pending_response));
-    // The client will restart the request with a new loader.
-    // |this| will be deleted.
-    CleanUp();
   } else {
     mojo::ScopedDataPipeConsumerHandle consumer_handle;
     if (CreateDataPipe(nullptr /*options*/, producer_handle_,
@@ -714,15 +734,13 @@ void StreamReaderURLLoader::ContinueWithResponseHeaders(
       RequestComplete(net::ERR_FAILED);
       return;
     }
-    writable_handle_watcher_.Watch(
-        producer_handle_.get(), MOJO_HANDLE_SIGNAL_WRITABLE,
-        base::BindRepeating(&StreamReaderURLLoader::OnDataPipeWritable,
-                            base::Unretained(this)));
 
+    need_client_callback_ = true;
     client_->OnReceiveResponse(std::move(pending_response),
                                std::move(consumer_handle),
                                std::move(cached_metadata_));
-    ReadMore();
+
+    // Wait for the client to call Continue() or Cancel().
   }
 }
 
@@ -808,20 +826,21 @@ void StreamReaderURLLoader::RequestComplete(int status_code) {
   // We don't support decoders, so use the same value.
   status.decoded_body_length = total_bytes_read_;
 
-  client_->OnComplete(status);
   CleanUp();
+
+  // May delete |this|.
+  client_->OnComplete(status);
 }
 
 void StreamReaderURLLoader::CleanUp() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
+  weak_factory_.InvalidateWeakPtrs();
+
   // Resets the watchers and pipes, so that we will never be called back.
   writable_handle_watcher_.Cancel();
   pending_buffer_ = nullptr;
   producer_handle_.reset();
-
-  // Manages its own lifetime.
-  delete this;
 }
 
 bool StreamReaderURLLoader::ParseRange(const net::HttpRequestHeaders& headers) {
diff --git a/libcef/browser/net_service/stream_reader_url_loader.h b/libcef/browser/net_service/stream_reader_url_loader.h
index 5c1ac58fc..8c4096029 100644
--- a/libcef/browser/net_service/stream_reader_url_loader.h
+++ b/libcef/browser/net_service/stream_reader_url_loader.h
@@ -104,11 +104,9 @@ class StreamReaderURLLoader : public network::mojom::URLLoader {
   // on the IO thread unless otherwise indicated.
   class Delegate : public ResourceResponse {
    public:
-    // This method is called if the result of calling OpenInputStream was null.
-    // The |restarted| parameter is set to true if the request was restarted
-    // with a new loader.
-    virtual void OnInputStreamOpenFailed(int32_t request_id,
-                                         bool* restarted) = 0;
+    // Called if the result of calling OpenInputStream was nullptr. Returns
+    // true if the failure was handled.
+    virtual bool OnInputStreamOpenFailed(int32_t request_id) = 0;
   };
 
   StreamReaderURLLoader(
@@ -127,6 +125,10 @@ class StreamReaderURLLoader : public network::mojom::URLLoader {
 
   void Start();
 
+  // Called by the client in response to OnReceiveResponse.
+  void Continue();
+  void Cancel();
+
   // network::mojom::URLLoader methods:
   void FollowRedirect(
       const std::vector<std::string>& removed_headers,
@@ -186,6 +188,9 @@ class StreamReaderURLLoader : public network::mojom::URLLoader {
 
   base::OnceClosure open_cancel_callback_;
 
+  bool need_client_callback_ = false;
+  bool got_client_callback_ = false;
+
   base::WeakPtrFactory<StreamReaderURLLoader> weak_factory_;
 };
 
diff --git a/libcef/browser/osr/browser_platform_delegate_osr.cc b/libcef/browser/osr/browser_platform_delegate_osr.cc
index 287ebdd67..34e6b0450 100644
--- a/libcef/browser/osr/browser_platform_delegate_osr.cc
+++ b/libcef/browser/osr/browser_platform_delegate_osr.cc
@@ -87,9 +87,9 @@ void CefBrowserPlatformDelegateOsr::BrowserCreated(
 
 void CefBrowserPlatformDelegateOsr::BrowserDestroyed(
     CefBrowserHostBase* browser) {
-  CefBrowserPlatformDelegateAlloy::BrowserDestroyed(browser);
-
   view_osr_ = nullptr;
+  current_rvh_for_drag_ = nullptr;
+  CefBrowserPlatformDelegateAlloy::BrowserDestroyed(browser);
 }
 
 SkColor CefBrowserPlatformDelegateOsr::GetBackgroundColor() const {
diff --git a/libcef/browser/osr/render_widget_host_view_osr.cc b/libcef/browser/osr/render_widget_host_view_osr.cc
index 582e198bb..18a9aac51 100644
--- a/libcef/browser/osr/render_widget_host_view_osr.cc
+++ b/libcef/browser/osr/render_widget_host_view_osr.cc
@@ -307,8 +307,16 @@ void CefRenderWidgetHostViewOSR::ReleaseCompositor() {
         content::DelegatedFrameHost::HiddenCause::kOther);
   }
   delegated_frame_host_->DetachFromCompositor();
-
   delegated_frame_host_.reset(nullptr);
+
+  content::RenderWidgetHostImpl* render_widget_host_impl =
+      content::RenderWidgetHostImpl::From(render_widget_host_);
+  if (render_widget_host_impl) {
+    render_widget_host_impl->SetCompositorForFlingScheduler(nullptr);
+  }
+
+  host_display_client_ = nullptr;
+
   compositor_.reset(nullptr);
 }
 
diff --git a/libcef/browser/osr/render_widget_host_view_osr.h b/libcef/browser/osr/render_widget_host_view_osr.h
index 5dd54eb7b..5c9acf614 100644
--- a/libcef/browser/osr/render_widget_host_view_osr.h
+++ b/libcef/browser/osr/render_widget_host_view_osr.h
@@ -425,7 +425,7 @@ class CefRenderWidgetHostViewOSR
   raw_ptr<CefRenderWidgetHostViewOSR> parent_host_view_;
   raw_ptr<CefRenderWidgetHostViewOSR> popup_host_view_ = nullptr;
   raw_ptr<CefRenderWidgetHostViewOSR> child_host_view_ = nullptr;
-  std::set<CefRenderWidgetHostViewOSR*> guest_host_views_;
+  std::set<raw_ptr<CefRenderWidgetHostViewOSR>> guest_host_views_;
 
   CefRefPtr<AlloyBrowserHostImpl> browser_impl_;
 
diff --git a/libcef/browser/simple_menu_model_impl.cc b/libcef/browser/simple_menu_model_impl.cc
index 8c7d74016..41f8e00d5 100644
--- a/libcef/browser/simple_menu_model_impl.cc
+++ b/libcef/browser/simple_menu_model_impl.cc
@@ -62,16 +62,16 @@ CefSimpleMenuModelImpl::~CefSimpleMenuModelImpl() {
 void CefSimpleMenuModelImpl::Detach() {
   DCHECK(VerifyContext());
 
-  if (!submenumap_.empty()) {
+  while (!submenumap_.empty()) {
     auto it = submenumap_.begin();
-    for (; it != submenumap_.end(); ++it) {
-      it->second->Detach();
-    }
-    submenumap_.clear();
+    auto impl = it->second;
+    // Clear the raw_ptr reference before calling Detach().
+    submenumap_.erase(it);
+    impl->Detach();
   }
 
   if (is_owned_) {
-    delete model_;
+    model_.ClearAndDelete();
   }
   model_ = nullptr;
 }
diff --git a/libcef/browser/simple_menu_model_impl.h b/libcef/browser/simple_menu_model_impl.h
index 9a33dbe2f..71e4ac200 100644
--- a/libcef/browser/simple_menu_model_impl.h
+++ b/libcef/browser/simple_menu_model_impl.h
@@ -163,7 +163,7 @@ class CefSimpleMenuModelImpl : public CefMenuModel {
 
   // Keep the submenus alive until they're removed, or we're destroyed.
   using SubMenuMap =
-      std::map<ui::SimpleMenuModel*, CefRefPtr<CefSimpleMenuModelImpl>>;
+      std::map<raw_ptr<ui::SimpleMenuModel>, CefRefPtr<CefSimpleMenuModelImpl>>;
   SubMenuMap submenumap_;
 
   IMPLEMENT_REFCOUNTING(CefSimpleMenuModelImpl);
diff --git a/libcef/browser/stream_impl.cc b/libcef/browser/stream_impl.cc
index 3e0bd6a96..18eca67dc 100644
--- a/libcef/browser/stream_impl.cc
+++ b/libcef/browser/stream_impl.cc
@@ -6,8 +6,11 @@
 
 #include <stdlib.h>
 
+#include <algorithm>
+
 #include "base/files/file_util.h"
 #include "base/logging.h"
+#include "base/numerics/safe_conversions.h"
 #include "base/threading/thread_restrictions.h"
 
 // Static functions
@@ -33,7 +36,7 @@ CefRefPtr<CefStreamReader> CefStreamReader::CreateForData(void* data,
   DCHECK(size > 0);
   CefRefPtr<CefStreamReader> reader;
   if (data && size > 0) {
-    reader = new CefBytesReader(data, size, true);
+    reader = new CefBytesReader(data, size);
   }
   return reader;
 }
@@ -147,19 +150,15 @@ int CefFileWriter::Flush() {
 
 // CefBytesReader
 
-CefBytesReader::CefBytesReader(void* data, int64_t datasize, bool copy) {
-  SetData(data, datasize, copy);
-}
-
-CefBytesReader::~CefBytesReader() {
-  SetData(nullptr, 0, false);
+CefBytesReader::CefBytesReader(void* data, int64_t datasize) {
+  SetData(data, datasize);
 }
 
 size_t CefBytesReader::Read(void* ptr, size_t size, size_t n) {
   base::AutoLock lock_scope(lock_);
-  size_t s = (datasize_ - offset_) / size;
-  size_t ret = (n < s ? n : s);
-  memcpy(ptr, (reinterpret_cast<char*>(data_.get())) + offset_, ret * size);
+  size_t s = (data_.size() - offset_) / size;
+  size_t ret = std::min(n, s);
+  memcpy(ptr, data_.data() + offset_, ret * size);
   offset_ += ret * size;
   return ret;
 }
@@ -167,9 +166,12 @@ size_t CefBytesReader::Read(void* ptr, size_t size, size_t n) {
 int CefBytesReader::Seek(int64_t offset, int whence) {
   int rv = -1L;
   base::AutoLock lock_scope(lock_);
+
+  const int64_t size = base::checked_cast<int64_t>(data_.size());
+
   switch (whence) {
     case SEEK_CUR:
-      if (offset_ + offset > datasize_ || offset_ + offset < 0) {
+      if (offset_ + offset > size || offset_ + offset < 0) {
         break;
       }
       offset_ += offset;
@@ -177,15 +179,15 @@ int CefBytesReader::Seek(int64_t offset, int whence) {
       break;
     case SEEK_END: {
       int64_t offset_abs = std::abs(offset);
-      if (offset_abs > datasize_) {
+      if (offset_abs > size) {
         break;
       }
-      offset_ = datasize_ - offset_abs;
+      offset_ = size - offset_abs;
       rv = 0;
       break;
     }
     case SEEK_SET:
-      if (offset > datasize_ || offset < 0) {
+      if (offset > size || offset < 0) {
         break;
       }
       offset_ = offset;
@@ -203,120 +205,20 @@ int64_t CefBytesReader::Tell() {
 
 int CefBytesReader::Eof() {
   base::AutoLock lock_scope(lock_);
-  return (offset_ >= datasize_);
+  return (offset_ >= base::checked_cast<int64_t>(data_.size()));
 }
 
-void CefBytesReader::SetData(void* data, int64_t datasize, bool copy) {
+void CefBytesReader::SetData(void* data, int64_t datasize) {
   base::AutoLock lock_scope(lock_);
-  if (copy_) {
-    free(data_);
-  }
 
-  copy_ = copy;
   offset_ = 0;
-  datasize_ = datasize;
 
-  if (copy) {
-    data_ = malloc(datasize);
-    DCHECK(data_ != nullptr);
-    if (data_) {
-      memcpy(data_, data, datasize);
-    }
+  if (data && datasize > 0) {
+    data_.reserve(datasize);
+    std::copy(static_cast<unsigned char*>(data),
+              static_cast<unsigned char*>(data) + datasize,
+              std::back_inserter(data_));
   } else {
-    data_ = data;
+    data_.clear();
   }
 }
-
-// CefBytesWriter
-
-CefBytesWriter::CefBytesWriter(size_t grow) : grow_(grow), datasize_(grow) {
-  DCHECK(grow > 0);
-  data_ = malloc(grow);
-  DCHECK(data_ != nullptr);
-}
-
-CefBytesWriter::~CefBytesWriter() {
-  base::AutoLock lock_scope(lock_);
-  if (data_) {
-    free(data_);
-  }
-}
-
-size_t CefBytesWriter::Write(const void* ptr, size_t size, size_t n) {
-  base::AutoLock lock_scope(lock_);
-  size_t rv;
-  if (offset_ + static_cast<int64_t>(size * n) >= datasize_ &&
-      Grow(size * n) == 0) {
-    rv = 0;
-  } else {
-    memcpy(reinterpret_cast<char*>(data_.get()) + offset_, ptr, size * n);
-    offset_ += size * n;
-    rv = n;
-  }
-
-  return rv;
-}
-
-int CefBytesWriter::Seek(int64_t offset, int whence) {
-  int rv = -1L;
-  base::AutoLock lock_scope(lock_);
-  switch (whence) {
-    case SEEK_CUR:
-      if (offset_ + offset > datasize_ || offset_ + offset < 0) {
-        break;
-      }
-      offset_ += offset;
-      rv = 0;
-      break;
-    case SEEK_END: {
-      int64_t offset_abs = std::abs(offset);
-      if (offset_abs > datasize_) {
-        break;
-      }
-      offset_ = datasize_ - offset_abs;
-      rv = 0;
-      break;
-    }
-    case SEEK_SET:
-      if (offset > datasize_ || offset < 0) {
-        break;
-      }
-      offset_ = offset;
-      rv = 0;
-      break;
-  }
-
-  return rv;
-}
-
-int64_t CefBytesWriter::Tell() {
-  base::AutoLock lock_scope(lock_);
-  return offset_;
-}
-
-int CefBytesWriter::Flush() {
-  return 0;
-}
-
-std::string CefBytesWriter::GetDataString() {
-  base::AutoLock lock_scope(lock_);
-  std::string str(reinterpret_cast<char*>(data_.get()), offset_);
-  return str;
-}
-
-size_t CefBytesWriter::Grow(size_t size) {
-  base::AutoLock lock_scope(lock_);
-  size_t rv;
-  size_t s = (size > grow_ ? size : grow_);
-  void* tmp = realloc(data_, datasize_ + s);
-  DCHECK(tmp != nullptr);
-  if (tmp) {
-    data_ = tmp;
-    datasize_ += s;
-    rv = datasize_;
-  } else {
-    rv = 0;
-  }
-
-  return rv;
-}
diff --git a/libcef/browser/stream_impl.h b/libcef/browser/stream_impl.h
index 96b6e09bf..d1bcae475 100644
--- a/libcef/browser/stream_impl.h
+++ b/libcef/browser/stream_impl.h
@@ -8,7 +8,7 @@
 
 #include <stdio.h>
 
-#include <string>
+#include <vector>
 
 #include "base/memory/raw_ptr.h"
 #include "base/synchronization/lock.h"
@@ -59,8 +59,8 @@ class CefFileWriter : public CefStreamWriter {
 // Implementation of CefStreamReader for byte buffers.
 class CefBytesReader : public CefStreamReader {
  public:
-  CefBytesReader(void* data, int64_t datasize, bool copy);
-  ~CefBytesReader() override;
+  // |data| is always copied.
+  CefBytesReader(void* data, int64_t datasize);
 
   size_t Read(void* ptr, size_t size, size_t n) override;
   int Seek(int64_t offset, int whence) override;
@@ -68,15 +68,11 @@ class CefBytesReader : public CefStreamReader {
   int Eof() override;
   bool MayBlock() override { return false; }
 
-  void SetData(void* data, int64_t datasize, bool copy);
-
-  void* GetData() { return data_; }
-  size_t GetDataSize() { return offset_; }
+  // |data| is always copied.
+  void SetData(void* data, int64_t datasize);
 
  protected:
-  raw_ptr<void> data_ = nullptr;
-  int64_t datasize_ = 0;
-  bool copy_ = false;
+  std::vector<unsigned char> data_;
   int64_t offset_ = 0;
 
   base::Lock lock_;
@@ -84,35 +80,6 @@ class CefBytesReader : public CefStreamReader {
   IMPLEMENT_REFCOUNTING(CefBytesReader);
 };
 
-// Implementation of CefStreamWriter for byte buffers.
-class CefBytesWriter : public CefStreamWriter {
- public:
-  explicit CefBytesWriter(size_t grow);
-  ~CefBytesWriter() override;
-
-  size_t Write(const void* ptr, size_t size, size_t n) override;
-  int Seek(int64_t offset, int whence) override;
-  int64_t Tell() override;
-  int Flush() override;
-  bool MayBlock() override { return false; }
-
-  void* GetData() { return data_; }
-  int64_t GetDataSize() { return offset_; }
-  std::string GetDataString();
-
- protected:
-  size_t Grow(size_t size);
-
-  size_t grow_;
-  raw_ptr<void> data_;
-  int64_t datasize_;
-  int64_t offset_ = 0;
-
-  base::Lock lock_;
-
-  IMPLEMENT_REFCOUNTING(CefBytesWriter);
-};
-
 // Implementation of CefStreamReader for handlers.
 class CefHandlerReader : public CefStreamReader {
  public:
diff --git a/libcef/browser/views/layout_impl.h b/libcef/browser/views/layout_impl.h
index 18053d6ba..6e6e0003c 100644
--- a/libcef/browser/views/layout_impl.h
+++ b/libcef/browser/views/layout_impl.h
@@ -56,8 +56,8 @@ class CefLayoutImpl : public CefLayoutAdapter, public CefLayoutClass {
     owner_view_ = owner_view;
     layout_ref_ = CreateLayout();
     DCHECK(layout_ref_);
-    owner_view->SetLayoutManager(base::WrapUnique(layout_ref_.get()));
     layout_util::Assign(this, owner_view);
+    owner_view->SetLayoutManager(base::WrapUnique(layout_ref_.get()));
   }
 
   // Create the views::LayoutManager object.
diff --git a/libcef/browser/views/native_widget_mac.h b/libcef/browser/views/native_widget_mac.h
index b244a038c..bb7e7e354 100644
--- a/libcef/browser/views/native_widget_mac.h
+++ b/libcef/browser/views/native_widget_mac.h
@@ -51,7 +51,7 @@ class CefNativeWidgetMac : public views::NativeWidgetMac {
   // Returns true if the CefWindow is fully initialized.
   bool IsCefWindowInitialized() const;
 
-  raw_ptr<BrowserView> browser_view_ = nullptr;
+  raw_ptr<BrowserView, AcrossTasksDanglingUntriaged> browser_view_ = nullptr;
 };
 
 #endif  // CEF_LIBCEF_BROWSER_VIEWS_NATIVE_WIDGET_MAC_H_
diff --git a/libcef/browser/views/overlay_view_host.cc b/libcef/browser/views/overlay_view_host.cc
index 6a11ac0f3..eb3793acc 100644
--- a/libcef/browser/views/overlay_view_host.cc
+++ b/libcef/browser/views/overlay_view_host.cc
@@ -55,13 +55,13 @@ class CefOverlayControllerImpl : public CefOverlayController {
     if (IsValid()) {
       // Results in a call to Destroyed().
       host_->Close();
-      host_ = nullptr;
     }
   }
 
   void Destroyed() {
     DCHECK(view_);
     view_ = nullptr;
+    host_ = nullptr;
   }
 
   void SetBounds(const CefRect& bounds) override {
diff --git a/libcef/browser/views/view_view.h b/libcef/browser/views/view_view.h
index 0936ab7be..ecd0d7826 100644
--- a/libcef/browser/views/view_view.h
+++ b/libcef/browser/views/view_view.h
@@ -38,6 +38,15 @@ CEF_VIEW_VIEW_T class CefViewView : public ViewsViewClass {
   explicit CefViewView(CefViewDelegateClass* cef_delegate, Args... args)
       : ParentClass(args...), cef_delegate_(cef_delegate) {}
 
+  ~CefViewView() override {
+    // Clear the reference to the delegate which may be released by the
+    // CefViewImpl when it's destroyed via UserData.
+    cef_delegate_ = nullptr;
+
+    // Remove any UserData references to class members before they're destroyed.
+    ParentClass::ClearAllUserData();
+  }
+
   // Should be called from InitializeRootView() in the CefViewImpl-derived
   // class that created this object. This method will be called after
   // CefViewImpl registration has completed so it is safe to call complex
@@ -88,7 +97,7 @@ CEF_VIEW_VIEW_T class CefViewView : public ViewsViewClass {
       const views::ViewHierarchyChangedDetails& details);
 
   // Not owned by this object.
-  const raw_ptr<CefViewDelegateClass> cef_delegate_;
+  raw_ptr<CefViewDelegateClass> cef_delegate_;
 };
 
 CEF_VIEW_VIEW_T gfx::Size CEF_VIEW_VIEW_D::CalculatePreferredSize() const {
diff --git a/libcef/browser/views/widget_impl.h b/libcef/browser/views/widget_impl.h
index 3a633d1b3..58df5441c 100644
--- a/libcef/browser/views/widget_impl.h
+++ b/libcef/browser/views/widget_impl.h
@@ -89,7 +89,7 @@ class CefWidgetImpl : public views::Widget,
   bool initialized_ = false;
 
   // Map of Profile* to count.
-  using ProfileMap = std::map<Profile*, size_t>;
+  using ProfileMap = std::map<raw_ptr<Profile>, size_t>;
   ProfileMap associated_profiles_;
 
   CefColorProviderTracker color_provider_tracker_{this};
diff --git a/libcef/browser/views/window_view.cc b/libcef/browser/views/window_view.cc
index 3c26439d2..db17c48c7 100644
--- a/libcef/browser/views/window_view.cc
+++ b/libcef/browser/views/window_view.cc
@@ -54,31 +54,29 @@ class ClientViewEx : public views::ClientView {
  public:
   ClientViewEx(views::Widget* widget,
                views::View* contents_view,
-               CefWindowView::Delegate* window_delegate)
-      : views::ClientView(widget, contents_view),
-        window_delegate_(window_delegate) {
-    DCHECK(window_delegate_);
-  }
+               base::WeakPtr<CefWindowView> view)
+      : views::ClientView(widget, contents_view), view_(std::move(view)) {}
 
   ClientViewEx(const ClientViewEx&) = delete;
   ClientViewEx& operator=(const ClientViewEx&) = delete;
 
   views::CloseRequestResult OnWindowCloseRequested() override {
-    return window_delegate_->CanWidgetClose()
+    return view_->window_delegate()->CanWidgetClose()
                ? views::CloseRequestResult::kCanClose
                : views::CloseRequestResult::kCannotClose;
   }
 
  private:
-  // Not owned by this object.
-  raw_ptr<CefWindowView::Delegate> window_delegate_;
+  const base::WeakPtr<CefWindowView> view_;
 };
 
 // Extend NativeFrameView with draggable region handling.
 class NativeFrameViewEx : public views::NativeFrameView {
  public:
-  NativeFrameViewEx(views::Widget* widget, CefWindowView* view)
-      : views::NativeFrameView(widget), widget_(widget), view_(view) {}
+  NativeFrameViewEx(views::Widget* widget, base::WeakPtr<CefWindowView> view)
+      : views::NativeFrameView(widget),
+        widget_(widget),
+        view_(std::move(view)) {}
 
   NativeFrameViewEx(const NativeFrameViewEx&) = delete;
   NativeFrameViewEx& operator=(const NativeFrameViewEx&) = delete;
@@ -155,7 +153,7 @@ class NativeFrameViewEx : public views::NativeFrameView {
  private:
   // Not owned by this object.
   raw_ptr<views::Widget> widget_;
-  raw_ptr<CefWindowView> view_;
+  const base::WeakPtr<CefWindowView> view_;
 };
 
 // The area inside the frame border that can be clicked and dragged for resizing
@@ -170,8 +168,8 @@ const int kResizeAreaCornerSize = 16;
 // with a resizable border. Based on AppWindowFrameView and CustomFrameView.
 class CaptionlessFrameView : public views::NonClientFrameView {
  public:
-  CaptionlessFrameView(views::Widget* widget, CefWindowView* view)
-      : widget_(widget), view_(view) {}
+  CaptionlessFrameView(views::Widget* widget, base::WeakPtr<CefWindowView> view)
+      : widget_(widget), view_(std::move(view)) {}
 
   CaptionlessFrameView(const CaptionlessFrameView&) = delete;
   CaptionlessFrameView& operator=(const CaptionlessFrameView&) = delete;
@@ -288,7 +286,7 @@ class CaptionlessFrameView : public views::NonClientFrameView {
 
   // Not owned by this object.
   raw_ptr<views::Widget> widget_;
-  raw_ptr<CefWindowView> view_;
+  const base::WeakPtr<CefWindowView> view_;
 
   // The bounds of the client view, in this view's coordinates.
   gfx::Rect client_view_bounds_;
@@ -680,8 +678,8 @@ void CefWindowView::WindowClosing() {
   // Close any overlays now, before the Widget is destroyed.
   // Use a copy of the array because the original may be modified while
   // iterating.
-  std::vector<CefOverlayViewHost*> overlay_hosts = overlay_hosts_;
-  for (auto* overlay_host : overlay_hosts) {
+  std::vector<raw_ptr<CefOverlayViewHost>> overlay_hosts = overlay_hosts_;
+  for (auto& overlay_host : overlay_hosts) {
     overlay_host->Close();
   }
 
@@ -711,18 +709,21 @@ views::View* CefWindowView::GetContentsView() {
 }
 
 views::ClientView* CefWindowView::CreateClientView(views::Widget* widget) {
-  return new ClientViewEx(widget, GetContentsView(), window_delegate_);
+  return new ClientViewEx(widget, GetContentsView(),
+                          weak_ptr_factory_.GetWeakPtr());
 }
 
 std::unique_ptr<views::NonClientFrameView>
 CefWindowView::CreateNonClientFrameView(views::Widget* widget) {
   if (is_frameless_) {
     // Custom frame type that doesn't render a caption.
-    return std::make_unique<CaptionlessFrameView>(widget, this);
+    return std::make_unique<CaptionlessFrameView>(
+        widget, weak_ptr_factory_.GetWeakPtr());
   } else if (widget->ShouldUseNativeFrame()) {
     // DesktopNativeWidgetAura::CreateNonClientFrameView() returns
     // NativeFrameView by default. Extend that type.
-    return std::make_unique<NativeFrameViewEx>(widget, this);
+    return std::make_unique<NativeFrameViewEx>(widget,
+                                               weak_ptr_factory_.GetWeakPtr());
   }
 
   // Use Chromium provided CustomFrameView. In case if we would like to
diff --git a/libcef/browser/views/window_view.h b/libcef/browser/views/window_view.h
index fe1be369d..e3d0d7e1d 100644
--- a/libcef/browser/views/window_view.h
+++ b/libcef/browser/views/window_view.h
@@ -10,6 +10,7 @@
 #include <vector>
 
 #include "base/memory/raw_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "cef/include/views/cef_window.h"
 #include "cef/include/views/cef_window_delegate.h"
 #include "cef/libcef/browser/views/overlay_view_host.h"
@@ -141,6 +142,8 @@ class CefWindowView
   bool IsAlloyStyle() const { return is_alloy_style_; }
   bool IsChromeStyle() const { return !is_alloy_style_; }
 
+  Delegate* window_delegate() const { return window_delegate_.get(); }
+
  private:
   // Called after Widget teardown starts, before |this| is deleted.
   void DeleteDelegate();
@@ -173,7 +176,9 @@ class CefWindowView
   std::unique_ptr<WidgetDestructionObserver> host_widget_destruction_observer_;
 
   // Hosts for overlay widgets.
-  std::vector<CefOverlayViewHost*> overlay_hosts_;
+  std::vector<raw_ptr<CefOverlayViewHost>> overlay_hosts_;
+
+  base::WeakPtrFactory<CefWindowView> weak_ptr_factory_{this};
 };
 
 #endif  // CEF_LIBCEF_BROWSER_VIEWS_WINDOW_VIEW_H_
diff --git a/libcef/common/alloy/alloy_main_runner_delegate.cc b/libcef/common/alloy/alloy_main_runner_delegate.cc
index 60ef671d8..01b5a322f 100644
--- a/libcef/common/alloy/alloy_main_runner_delegate.cc
+++ b/libcef/common/alloy/alloy_main_runner_delegate.cc
@@ -5,6 +5,7 @@
 
 #include "cef/libcef/common/alloy/alloy_main_runner_delegate.h"
 
+#include "cef/libcef/browser/alloy/alloy_content_browser_client.h"
 #include "cef/libcef/browser/alloy/chrome_browser_process_alloy.h"
 #include "cef/libcef/common/alloy/alloy_main_delegate.h"
 #include "cef/libcef/renderer/alloy/alloy_content_renderer_client.h"
@@ -43,6 +44,9 @@ void AlloyMainRunnerDelegate::AfterUIThreadInitialize() {
 }
 
 void AlloyMainRunnerDelegate::BeforeUIThreadShutdown() {
+  static_cast<AlloyContentBrowserClient*>(
+      CefAppManager::Get()->GetContentClient()->browser())
+      ->CleanupOnUIThread();
   static_cast<ChromeBrowserProcessAlloy*>(g_browser_process)
       ->CleanupOnUIThread();
 
diff --git a/libcef/common/chrome/chrome_main_runner_delegate.cc b/libcef/common/chrome/chrome_main_runner_delegate.cc
index cffd45b75..80c35d5d8 100644
--- a/libcef/common/chrome/chrome_main_runner_delegate.cc
+++ b/libcef/common/chrome/chrome_main_runner_delegate.cc
@@ -7,10 +7,10 @@
 
 #include "base/command_line.h"
 #include "base/run_loop.h"
+#include "cef/libcef/browser/chrome/chrome_content_browser_client_cef.h"
 #include "cef/libcef/common/app_manager.h"
 #include "cef/libcef/common/chrome/chrome_main_delegate_cef.h"
 #include "chrome/browser/browser_process_impl.h"
-#include "chrome/browser/chrome_content_browser_client.h"
 #include "chrome/browser/chrome_process_singleton.h"
 #include "chrome/common/profiler/main_thread_stack_sampling_profiler.h"
 #include "components/keep_alive_registry/keep_alive_types.h"
@@ -96,7 +96,7 @@ void ChromeMainRunnerDelegate::BeforeUIThreadInitialize() {
 }
 
 void ChromeMainRunnerDelegate::BeforeUIThreadShutdown() {
-  static_cast<ChromeContentBrowserClient*>(
+  static_cast<ChromeContentBrowserClientCef*>(
       CefAppManager::Get()->GetContentClient()->browser())
       ->CleanupOnUIThread();
   main_delegate_->CleanupOnUIThread();
diff --git a/libcef/common/value_base.cc b/libcef/common/value_base.cc
index 304b3b7a4..cad6643f4 100644
--- a/libcef/common/value_base.cc
+++ b/libcef/common/value_base.cc
@@ -70,13 +70,32 @@ void CefValueController::Remove(void* value, bool notify_object) {
     // Remove all dependencies.
     dependency_map_.clear();
   } else {
-    ReferenceMap::iterator it = reference_map_.find(value);
-    if (it != reference_map_.end()) {
-      // Remove the reference.
-      if (notify_object) {
-        it->second->OnControlRemoved();
+    {
+      ReferenceMap::iterator it = reference_map_.find(value);
+      if (it != reference_map_.end()) {
+        // Remove the reference.
+        if (notify_object) {
+          it->second->OnControlRemoved();
+        }
+        reference_map_.erase(it);
+      }
+    }
+
+    if (!dependency_map_.empty()) {
+      // Remove any instance from dependency map sets.
+      DependencyMap::iterator it = dependency_map_.begin();
+      while (it != dependency_map_.end()) {
+        DependencySet& set = it->second;
+        DependencySet::iterator it_set = set.find(value);
+        if (it_set != set.end()) {
+          set.erase(it_set);
+        }
+        if (set.empty()) {
+          it = dependency_map_.erase(it);
+        } else {
+          ++it;
+        }
       }
-      reference_map_.erase(it);
     }
   }
 }
diff --git a/libcef/common/value_base.h b/libcef/common/value_base.h
index ca2eb0e73..e3d616698 100644
--- a/libcef/common/value_base.h
+++ b/libcef/common/value_base.h
@@ -133,12 +133,12 @@ class CefValueController
   raw_ptr<Object> owner_object_ = nullptr;
 
   // Map of reference objects.
-  using ReferenceMap = std::map<void*, Object*>;
+  using ReferenceMap = std::map<raw_ptr<void>, raw_ptr<Object>>;
   ReferenceMap reference_map_;
 
   // Map of dependency objects.
-  using DependencySet = std::set<void*>;
-  using DependencyMap = std::map<void*, DependencySet>;
+  using DependencySet = std::set<raw_ptr<void>>;
+  using DependencyMap = std::map<raw_ptr<void>, DependencySet>;
   DependencyMap dependency_map_;
 };
 
@@ -323,7 +323,7 @@ class CefValueBase : public CefType, public CefValueController::Object {
       controller()->RemoveDependencies(value_);
 
       // Delete the value.
-      DeleteValue(value_.get());
+      value_.ClearAndDelete();
     }
 
     controller_ = nullptr;
@@ -375,9 +375,6 @@ class CefValueBase : public CefType, public CefValueController::Object {
     value_ = nullptr;
   }
 
-  // Override to customize value deletion.
-  virtual void DeleteValue(ValueType* value) { delete value; }
-
   // Returns a mutable reference to the value.
   inline ValueType* mutable_value() const {
     DCHECK(value_);
diff --git a/libcef/common/values_impl.cc b/libcef/common/values_impl.cc
index 24ec92690..bb6ab801b 100644
--- a/libcef/common/values_impl.cc
+++ b/libcef/common/values_impl.cc
@@ -1036,10 +1036,10 @@ bool CefDictionaryValueImpl::SetList(const CefString& key,
 }
 
 bool CefDictionaryValueImpl::RemoveInternal(const CefString& key) {
-  // The ExtractKey() call below which removes the Value from the dictionary
+  // The Extract() call below which removes the Value from the dictionary
   // will return a new Value object with the moved contents of the Value that
-  // exists in the implementation std::map. Consequently we use FindKey() to
-  // retrieve the actual Value pointer as it current exists first, for later
+  // exists in the implementation std::map. Consequently we use Find() to
+  // retrieve the actual Value pointer as it current exists first, for
   // comparison purposes.
   const base::Value* actual_value =
       const_value().GetDict().Find(std::string_view(key.ToString()));
@@ -1047,21 +1047,19 @@ bool CefDictionaryValueImpl::RemoveInternal(const CefString& key) {
     return false;
   }
 
-  // |actual_value| is no longer valid after this call.
-  std::optional<base::Value> out_value =
-      mutable_value()->GetDict().Extract(std::string_view(key.ToString()));
-  if (!out_value.has_value()) {
-    return false;
-  }
-
   // Remove the value.
   controller()->Remove(const_cast<base::Value*>(actual_value), true);
 
   // Only list and dictionary types may have dependencies.
-  if (out_value->is_list() || out_value->is_dict()) {
+  if (actual_value->is_list() || actual_value->is_dict()) {
     controller()->RemoveDependencies(const_cast<base::Value*>(actual_value));
   }
 
+  // |actual_value| is no longer valid after this call.
+  std::optional<base::Value> out_value =
+      mutable_value()->GetDict().Extract(std::string_view(key.ToString()));
+  DCHECK(out_value.has_value());
+
   return true;
 }
 
@@ -1492,22 +1490,22 @@ bool CefListValueImpl::RemoveInternal(size_t index) {
   // The std::move() call below which removes the Value from the list will
   // return a new Value object with the moved contents of the Value that exists
   // in the implementation std::vector. Consequently we use operator[] to
-  // retrieve the actual Value pointer as it current exists first, for later
+  // retrieve the actual Value pointer as it current exists first, for
   // comparison purposes.
   const base::Value& actual_value = list[index];
 
-  // |actual_value| is no longer valid after this call.
-  auto out_value = std::move(list[index]);
-  list.erase(list.begin() + index);
-
   // Remove the value.
   controller()->Remove(const_cast<base::Value*>(&actual_value), true);
 
   // Only list and dictionary types may have dependencies.
-  if (out_value.is_list() || out_value.is_dict()) {
+  if (actual_value.is_list() || actual_value.is_dict()) {
     controller()->RemoveDependencies(const_cast<base::Value*>(&actual_value));
   }
 
+  // |actual_value| is no longer valid after this call.
+  auto out_value = std::move(list[index]);
+  list.erase(list.begin() + index);
+
   return true;
 }
 
diff --git a/patch/patch.cfg b/patch/patch.cfg
index ccda02fae..981ba40e5 100644
--- a/patch/patch.cfg
+++ b/patch/patch.cfg
@@ -801,5 +801,10 @@ patches = [
     # https://issues.chromium.org/issues/340815319
     # https://chromium-review.googlesource.com/c/chromium/src/+/5542485
     'name': 'base_allocator_instance_tracer_5542485'
+  },
+  {
+    # Fix dangling raw_ptr errors.
+    # https://github.com/chromiumembedded/cef/issues/3239
+    'name': 'raw_ptr_3239'
   }
 ]
diff --git a/patch/patches/chrome_runtime_views.patch b/patch/patches/chrome_runtime_views.patch
index 32865efae..c3a903cff 100644
--- a/patch/patches/chrome_runtime_views.patch
+++ b/patch/patches/chrome_runtime_views.patch
@@ -233,10 +233,10 @@ index 0ccfe39eb5696..c9424316b6d14 100644
      return gfx::Rect();
    }
 diff --git chrome/browser/ui/views/frame/browser_frame.cc chrome/browser/ui/views/frame/browser_frame.cc
-index 8dd3620ba2720..e3bac8207de24 100644
+index 8dd3620ba2720..bb69a77f9551e 100644
 --- chrome/browser/ui/views/frame/browser_frame.cc
 +++ chrome/browser/ui/views/frame/browser_frame.cc
-@@ -114,15 +114,23 @@ ui::ColorProviderKey::SchemeVariant GetSchemeVariant(
+@@ -114,15 +114,25 @@ ui::ColorProviderKey::SchemeVariant GetSchemeVariant(
  ////////////////////////////////////////////////////////////////////////////////
  // BrowserFrame, public:
  
@@ -253,16 +253,18 @@ index 8dd3620ba2720..e3bac8207de24 100644
    // Don't focus anything on creation, selecting a tab will set the focus.
    set_focus_on_creation(false);
 +  if (browser_view)
-+    InitBrowserView(browser_view);
++    SetBrowserView(browser_view);
 +}
 +
-+void BrowserFrame::InitBrowserView(BrowserView* browser_view) {
++void BrowserFrame::SetBrowserView(BrowserView* browser_view) {
 +  browser_view_ = browser_view;
-+  browser_view_->set_frame(this);
++  if (browser_view_) {
++    browser_view_->set_frame(this);
++  }
  }
  
  BrowserFrame::~BrowserFrame() {}
-@@ -228,10 +236,20 @@ void BrowserFrame::LayoutWebAppWindowTitle(
+@@ -228,10 +238,20 @@ void BrowserFrame::LayoutWebAppWindowTitle(
  }
  
  int BrowserFrame::GetTopInset() const {
@@ -283,7 +285,7 @@ index 8dd3620ba2720..e3bac8207de24 100644
    browser_frame_view_->UpdateThrobber(running);
  }
  
-@@ -240,6 +258,8 @@ BrowserNonClientFrameView* BrowserFrame::GetFrameView() const {
+@@ -240,6 +260,8 @@ BrowserNonClientFrameView* BrowserFrame::GetFrameView() const {
  }
  
  bool BrowserFrame::UseCustomFrame() const {
@@ -292,7 +294,7 @@ index 8dd3620ba2720..e3bac8207de24 100644
    return native_browser_frame_->UseCustomFrame();
  }
  
-@@ -253,20 +273,30 @@ bool BrowserFrame::ShouldDrawFrameHeader() const {
+@@ -253,20 +275,30 @@ bool BrowserFrame::ShouldDrawFrameHeader() const {
  
  void BrowserFrame::GetWindowPlacement(gfx::Rect* bounds,
                                        ui::WindowShowState* show_state) const {
@@ -323,7 +325,7 @@ index 8dd3620ba2720..e3bac8207de24 100644
    browser_frame_view_->OnBrowserViewInitViewsComplete();
  }
  
-@@ -367,6 +397,8 @@ ui::ColorProviderKey::ThemeInitializerSupplier* BrowserFrame::GetCustomTheme()
+@@ -367,6 +399,8 @@ ui::ColorProviderKey::ThemeInitializerSupplier* BrowserFrame::GetCustomTheme()
  }
  
  void BrowserFrame::OnNativeWidgetWorkspaceChanged() {
@@ -332,7 +334,7 @@ index 8dd3620ba2720..e3bac8207de24 100644
    chrome::SaveWindowWorkspace(browser_view_->browser(), GetWorkspace());
    chrome::SaveWindowVisibleOnAllWorkspaces(browser_view_->browser(),
                                             IsVisibleOnAllWorkspaces());
-@@ -572,6 +604,13 @@ void BrowserFrame::SelectNativeTheme() {
+@@ -572,6 +606,13 @@ void BrowserFrame::SelectNativeTheme() {
      return;
    }
  
@@ -346,7 +348,7 @@ index 8dd3620ba2720..e3bac8207de24 100644
    // Ignore the system theme for web apps with window-controls-overlay as the
    // display_override so the web contents can blend with the overlay by using
    // the developer-provided theme color for a better experience. Context:
-@@ -637,5 +676,8 @@ bool BrowserFrame::RegenerateFrameOnThemeChange(
+@@ -637,5 +678,8 @@ bool BrowserFrame::RegenerateFrameOnThemeChange(
  }
  
  bool BrowserFrame::IsIncognitoBrowser() const {
@@ -356,20 +358,18 @@ index 8dd3620ba2720..e3bac8207de24 100644
    return browser_view_->browser()->profile()->IsIncognitoProfile();
  }
 diff --git chrome/browser/ui/views/frame/browser_frame.h chrome/browser/ui/views/frame/browser_frame.h
-index 2e973c9e279b0..8662f9cf14b17 100644
+index 2e973c9e279b0..07d04a364d60c 100644
 --- chrome/browser/ui/views/frame/browser_frame.h
 +++ chrome/browser/ui/views/frame/browser_frame.h
-@@ -58,7 +58,9 @@ enum class TabDragKind {
+@@ -58,6 +58,7 @@ enum class TabDragKind {
  // This is a virtual interface that allows system specific browser frames.
  class BrowserFrame : public views::Widget, public views::ContextMenuController {
   public:
 +  BrowserFrame();
    explicit BrowserFrame(BrowserView* browser_view);
-+  void InitBrowserView(BrowserView* browser_view);
  
    BrowserFrame(const BrowserFrame&) = delete;
-   BrowserFrame& operator=(const BrowserFrame&) = delete;
-@@ -137,7 +139,7 @@ class BrowserFrame : public views::Widget, public views::ContextMenuController {
+@@ -137,7 +138,7 @@ class BrowserFrame : public views::Widget, public views::ContextMenuController {
  
    // ThemeService calls this when a user has changed their theme, indicating
    // that it's time to redraw everything.
@@ -378,7 +378,16 @@ index 2e973c9e279b0..8662f9cf14b17 100644
  
    // views::Widget:
    views::internal::RootView* CreateRootView() override;
-@@ -175,17 +177,17 @@ class BrowserFrame : public views::Widget, public views::ContextMenuController {
+@@ -170,22 +171,26 @@ class BrowserFrame : public views::Widget, public views::ContextMenuController {
+   void SetTabDragKind(TabDragKind tab_drag_kind);
+   TabDragKind tab_drag_kind() const { return tab_drag_kind_; }
+ 
++  BrowserView* browser_view() const { return browser_view_.get(); }
++
+  protected:
++  void SetBrowserView(BrowserView* browser_view);
++
+   // views::Widget:
    void OnNativeThemeUpdated(ui::NativeTheme* observed_theme) override;
    ui::ColorProviderKey GetColorProviderKey() const override;
  
@@ -402,7 +411,7 @@ index 2e973c9e279b0..8662f9cf14b17 100644
    // regenerated.
    bool RegenerateFrameOnThemeChange(BrowserThemeChangeType theme_change_type);
 diff --git chrome/browser/ui/views/frame/browser_view.cc chrome/browser/ui/views/frame/browser_view.cc
-index 110812d2874d7..89b28bdb32d90 100644
+index 110812d2874d7..6ac4f560d7c27 100644
 --- chrome/browser/ui/views/frame/browser_view.cc
 +++ chrome/browser/ui/views/frame/browser_view.cc
 @@ -346,11 +346,10 @@ using content::NativeWebKeyboardEvent;
@@ -486,9 +495,17 @@ index 110812d2874d7..89b28bdb32d90 100644
  
    // Stop the animation timer explicitly here to avoid running it in a nested
    // message loop, which may run by Browser destructor.
-@@ -1031,12 +1057,14 @@ BrowserView::~BrowserView() {
-   // child views and it is an observer for avatar toolbar button if any.
-   autofill_bubble_handler_.reset();
+@@ -1026,17 +1052,18 @@ BrowserView::~BrowserView() {
+   // Immersive mode may need to reparent views before they are removed/deleted.
+   immersive_mode_controller_.reset();
+ 
+-  // Reset autofill bubble handler to make sure it does not out-live toolbar,
+-  // since it is responsible for showing autofill related bubbles from toolbar's
+-  // child views and it is an observer for avatar toolbar button if any.
+-  autofill_bubble_handler_.reset();
++  // If the Toolbar is not overloaded it will be destroyed via
++  // RemoveAllChildViews().
++  WillDestroyToolbar();
  
 +  if (browser_) {
    auto* global_registry =
@@ -501,7 +518,7 @@ index 110812d2874d7..89b28bdb32d90 100644
  
    // The TabStrip attaches a listener to the model. Make sure we shut down the
    // TabStrip first so that it can cleanly remove the listener.
-@@ -1060,7 +1088,9 @@ BrowserView::~BrowserView() {
+@@ -1060,7 +1087,9 @@ BrowserView::~BrowserView() {
  
    // `SidePanelUI::RemoveSidePanelUIForBrowser()` deletes the
    // SidePanelCoordinator.
@@ -511,7 +528,21 @@ index 110812d2874d7..89b28bdb32d90 100644
  }
  
  // static
-@@ -2032,9 +2062,14 @@ void BrowserView::OnExclusiveAccessUserInput() {
+@@ -1621,6 +1650,13 @@ gfx::Point BrowserView::GetThemeOffsetFromBrowserView() const {
+       ThemeProperties::kFrameHeightAboveTabs - browser_view_origin.y());
+ }
+ 
++void BrowserView::WillDestroyToolbar() {
++  // Reset autofill bubble handler to make sure it does not out-live toolbar,
++  // since it is responsible for showing autofill related bubbles from toolbar's
++  // child views and it is an observer for avatar toolbar button if any.
++  autofill_bubble_handler_.reset();
++}
++
+ // static:
+ BrowserView::DevToolsDockedPlacement BrowserView::GetDevToolsDockedPlacement(
+     const gfx::Rect& contents_webview_bounds,
+@@ -2032,9 +2068,14 @@ void BrowserView::OnExclusiveAccessUserInput() {
  
  bool BrowserView::ShouldHideUIForFullscreen() const {
    // Immersive mode needs UI for the slide-down top panel.
@@ -527,7 +558,7 @@ index 110812d2874d7..89b28bdb32d90 100644
    return frame_->GetFrameView()->ShouldHideTopUIForFullscreen();
  }
  
-@@ -3170,7 +3205,8 @@ DownloadShelf* BrowserView::GetDownloadShelf() {
+@@ -3170,7 +3211,8 @@ DownloadShelf* BrowserView::GetDownloadShelf() {
  }
  
  DownloadBubbleUIController* BrowserView::GetDownloadBubbleUIController() {
@@ -537,7 +568,7 @@ index 110812d2874d7..89b28bdb32d90 100644
    if (auto* download_button = toolbar_button_provider_->GetDownloadButton())
      return download_button->bubble_controller();
    return nullptr;
-@@ -3725,7 +3761,8 @@ void BrowserView::ReparentTopContainerForEndOfImmersive() {
+@@ -3725,7 +3767,8 @@ void BrowserView::ReparentTopContainerForEndOfImmersive() {
    if (top_container()->parent() == this)
      return;
  
@@ -547,7 +578,7 @@ index 110812d2874d7..89b28bdb32d90 100644
    top_container()->DestroyLayer();
    AddChildViewAt(top_container(), 0);
    EnsureFocusOrder();
-@@ -4207,11 +4244,38 @@ void BrowserView::GetAccessiblePanes(std::vector<views::View*>* panes) {
+@@ -4207,11 +4250,38 @@ void BrowserView::GetAccessiblePanes(std::vector<views::View*>* panes) {
  bool BrowserView::ShouldDescendIntoChildForEventHandling(
      gfx::NativeView child,
      const gfx::Point& location) {
@@ -588,7 +619,7 @@ index 110812d2874d7..89b28bdb32d90 100644
      // Draggable regions are defined relative to the web contents.
      gfx::Point point_in_contents_web_view_coords(location);
      views::View::ConvertPointToTarget(GetWidget()->GetRootView(),
-@@ -4220,7 +4284,7 @@ bool BrowserView::ShouldDescendIntoChildForEventHandling(
+@@ -4220,7 +4290,7 @@ bool BrowserView::ShouldDescendIntoChildForEventHandling(
  
      // Draggable regions should be ignored for clicks into any browser view's
      // owned widgets, for example alerts, permission prompts or find bar.
@@ -597,7 +628,7 @@ index 110812d2874d7..89b28bdb32d90 100644
                 point_in_contents_web_view_coords.x(),
                 point_in_contents_web_view_coords.y()) ||
             WidgetOwnedByAnchorContainsPoint(point_in_contents_web_view_coords);
-@@ -4331,8 +4395,10 @@ void BrowserView::Layout(PassKey) {
+@@ -4331,8 +4401,10 @@ void BrowserView::Layout(PassKey) {
  
    // TODO(jamescook): Why was this in the middle of layout code?
    toolbar_->location_bar()->omnibox_view()->SetFocusBehavior(
@@ -610,7 +641,7 @@ index 110812d2874d7..89b28bdb32d90 100644
  
    // Some of the situations when the BrowserView is laid out are:
    // - Enter/exit immersive fullscreen mode.
-@@ -4398,6 +4464,11 @@ void BrowserView::AddedToWidget() {
+@@ -4398,6 +4470,11 @@ void BrowserView::AddedToWidget() {
    SetThemeProfileForWindow(GetNativeWindow(), browser_->profile());
  #endif
  
@@ -622,7 +653,7 @@ index 110812d2874d7..89b28bdb32d90 100644
    toolbar_->Init();
  
    // TODO(pbos): Investigate whether the side panels should be creatable when
-@@ -4445,13 +4516,9 @@ void BrowserView::AddedToWidget() {
+@@ -4445,13 +4522,9 @@ void BrowserView::AddedToWidget() {
  
    EnsureFocusOrder();
  
@@ -638,7 +669,7 @@ index 110812d2874d7..89b28bdb32d90 100644
    using_native_frame_ = frame_->ShouldUseNativeFrame();
  
    MaybeInitializeWebUITabStrip();
-@@ -4882,7 +4949,8 @@ void BrowserView::ProcessFullscreen(bool fullscreen,
+@@ -4882,7 +4955,8 @@ void BrowserView::ProcessFullscreen(bool fullscreen,
    // Undo our anti-jankiness hacks and force a re-layout.
    in_process_fullscreen_ = false;
    ToolbarSizeChanged(false);
@@ -648,7 +679,7 @@ index 110812d2874d7..89b28bdb32d90 100644
  }
  
  bool BrowserView::ShouldUseImmersiveFullscreenForUrl(const GURL& url) const {
-@@ -5304,6 +5372,8 @@ Profile* BrowserView::GetProfile() {
+@@ -5304,6 +5378,8 @@ Profile* BrowserView::GetProfile() {
  }
  
  void BrowserView::UpdateUIForTabFullscreen() {
@@ -657,7 +688,7 @@ index 110812d2874d7..89b28bdb32d90 100644
    frame()->GetFrameView()->UpdateFullscreenTopUI();
  }
  
-@@ -5326,6 +5396,8 @@ void BrowserView::HideDownloadShelf() {
+@@ -5326,6 +5402,8 @@ void BrowserView::HideDownloadShelf() {
  }
  
  bool BrowserView::CanUserExitFullscreen() const {
@@ -667,7 +698,7 @@ index 110812d2874d7..89b28bdb32d90 100644
  }
  
 diff --git chrome/browser/ui/views/frame/browser_view.h chrome/browser/ui/views/frame/browser_view.h
-index 46cdfe23b1234..14cbb302de0a2 100644
+index 46cdfe23b1234..4f3b2b7650b72 100644
 --- chrome/browser/ui/views/frame/browser_view.h
 +++ chrome/browser/ui/views/frame/browser_view.h
 @@ -138,11 +138,16 @@ class BrowserView : public BrowserWindow,
@@ -687,11 +718,21 @@ index 46cdfe23b1234..14cbb302de0a2 100644
    void set_frame(BrowserFrame* frame) {
      frame_ = frame;
      paint_as_active_subscription_ =
-@@ -873,6 +878,9 @@ class BrowserView : public BrowserWindow,
+@@ -850,6 +855,10 @@ class BrowserView : public BrowserWindow,
+   // TopContainerBackground::PaintThemeCustomImage for details.
+   gfx::Point GetThemeOffsetFromBrowserView() const;
+ 
++  // Called during Toolbar destruction to remove dependent objects that have
++  // dangling references.
++  virtual void WillDestroyToolbar();
++
+  protected:
+   // Enumerates where the devtools are docked relative to the browser's main
+   // web contents.
+@@ -873,6 +882,8 @@ class BrowserView : public BrowserWindow,
        const gfx::Rect& contents_webview_bounds,
        const gfx::Rect& local_webview_container_bounds);
  
-+ protected:
 +  virtual ToolbarView* OverrideCreateToolbar() { return nullptr; }
 +
   private:
@@ -980,7 +1021,7 @@ index 880d83324cfa6..a6a80cd0b3def 100644
  }
  
 diff --git chrome/browser/ui/views/toolbar/toolbar_view.cc chrome/browser/ui/views/toolbar/toolbar_view.cc
-index e97342ef97514..e373f6374fa4c 100644
+index e97342ef97514..03b140c9fc7c6 100644
 --- chrome/browser/ui/views/toolbar/toolbar_view.cc
 +++ chrome/browser/ui/views/toolbar/toolbar_view.cc
 @@ -191,7 +191,7 @@ class TabstripLikeBackground : public views::Background {
@@ -1008,7 +1049,12 @@ index e97342ef97514..e373f6374fa4c 100644
    SetID(VIEW_ID_TOOLBAR);
  
    container_view_ = AddChildView(std::make_unique<ContainerView>());
-@@ -251,6 +252,19 @@ ToolbarView::~ToolbarView() {
+@@ -248,9 +249,24 @@ ToolbarView::~ToolbarView() {
+ 
+   for (const auto& view_and_command : GetViewCommandMap())
+     chrome::RemoveCommandObserver(browser_, view_and_command.second, this);
++
++  browser_view_->WillDestroyToolbar();
  }
  
  void ToolbarView::Init() {
@@ -1028,7 +1074,7 @@ index e97342ef97514..e373f6374fa4c 100644
  #if defined(USE_AURA)
    // Avoid generating too many occlusion tracking calculation events before this
    // function returns. The occlusion status will be computed only once once this
-@@ -275,12 +289,12 @@ void ToolbarView::Init() {
+@@ -275,12 +291,12 @@ void ToolbarView::Init() {
  
    auto location_bar = std::make_unique<LocationBarView>(
        browser_, browser_->profile(), browser_->command_controller(), this,
@@ -1043,7 +1089,7 @@ index e97342ef97514..e373f6374fa4c 100644
      download_button =
          std::make_unique<DownloadToolbarButtonView>(browser_view_);
    }
-@@ -362,8 +376,10 @@ void ToolbarView::Init() {
+@@ -362,8 +378,10 @@ void ToolbarView::Init() {
      }
    }
    std::unique_ptr<media_router::CastToolbarButton> cast;
@@ -1055,7 +1101,7 @@ index e97342ef97514..e373f6374fa4c 100644
  
    std::unique_ptr<MediaToolbarButtonView> media_button;
    if (base::FeatureList::IsEnabled(media::kGlobalMediaControls)) {
-@@ -373,7 +389,8 @@ void ToolbarView::Init() {
+@@ -373,7 +391,8 @@ void ToolbarView::Init() {
  
    std::unique_ptr<send_tab_to_self::SendTabToSelfToolbarIconView>
        send_tab_to_self_button;
@@ -1065,7 +1111,7 @@ index e97342ef97514..e373f6374fa4c 100644
      send_tab_to_self_button =
          std::make_unique<send_tab_to_self::SendTabToSelfToolbarIconView>(
              browser_view_);
-@@ -452,7 +469,7 @@ void ToolbarView::Init() {
+@@ -452,7 +471,7 @@ void ToolbarView::Init() {
      send_tab_to_self_button_ =
          container_view_->AddChildView(std::move(send_tab_to_self_button));
  
@@ -1074,7 +1120,7 @@ index e97342ef97514..e373f6374fa4c 100644
      if (companion::IsCompanionFeatureEnabled()) {
        side_panel_container_ = container_view_->AddChildView(
            std::make_unique<SidePanelToolbarContainer>(browser_view_));
-@@ -818,7 +835,7 @@ void ToolbarView::Layout(PassKey) {
+@@ -818,7 +837,7 @@ void ToolbarView::Layout(PassKey) {
    if (display_mode_ == DisplayMode::NORMAL) {
      LayoutCommon();
  
diff --git a/patch/patches/raw_ptr_3239.patch b/patch/patches/raw_ptr_3239.patch
new file mode 100644
index 000000000..69631056c
--- /dev/null
+++ b/patch/patches/raw_ptr_3239.patch
@@ -0,0 +1,26 @@
+diff --git net/base/directory_lister.cc net/base/directory_lister.cc
+index ae3a99f31e2ec..213cc33f2cc8e 100644
+--- net/base/directory_lister.cc
++++ net/base/directory_lister.cc
+@@ -200,7 +200,7 @@ void DirectoryLister::OnListFile(const DirectoryListerData& data) {
+ }
+ 
+ void DirectoryLister::OnListDone(int error) {
+-  delegate_->OnListDone(error);
++  delegate_.ExtractAsDangling()->OnListDone(error);
+ }
+ 
+ }  // namespace net
+diff --git net/base/directory_lister.h net/base/directory_lister.h
+index 991d15b79878e..b4a5534ea2c87 100644
+--- net/base/directory_lister.h
++++ net/base/directory_lister.h
+@@ -133,7 +133,7 @@ class NET_EXPORT DirectoryLister  {
+   void OnListDone(int error);
+ 
+   scoped_refptr<Core> core_;
+-  const raw_ptr<DirectoryListerDelegate> delegate_;
++  raw_ptr<DirectoryListerDelegate> delegate_;
+ };
+ 
+ }  // namespace net
diff --git a/tests/cefsimple/simple_app.cc b/tests/cefsimple/simple_app.cc
index ab24337b0..2f56f9daa 100644
--- a/tests/cefsimple/simple_app.cc
+++ b/tests/cefsimple/simple_app.cc
@@ -144,7 +144,7 @@ void SimpleApp::OnContextInitialized() {
   // that instead of the default URL.
   url = command_line->GetSwitchValue("url");
   if (url.empty()) {
-    url = "http://www.google.com";
+    url = "https://www.google.com";
   }
 
   // Views is enabled by default with the Chrome bootstrap (add `--use-native`
diff --git a/tests/ceftests/frame_handler_unittest.cc b/tests/ceftests/frame_handler_unittest.cc
index 222d31c53..a99e5341d 100644
--- a/tests/ceftests/frame_handler_unittest.cc
+++ b/tests/ceftests/frame_handler_unittest.cc
@@ -423,8 +423,10 @@ struct FrameStatus {
     auto main_frame = browser->GetMainFrame();
     if (expect_valid) {
       EXPECT_TRUE(main_frame) << func;
-      EXPECT_TRUE(main_frame->IsValid()) << func;
-      EXPECT_TRUE(main_frame->IsMain()) << func;
+      if (main_frame) {
+        EXPECT_TRUE(main_frame->IsValid()) << func;
+        EXPECT_TRUE(main_frame->IsMain()) << func;
+      }
     } else {
       // GetMainFrame() returns nullptr after OnBeforeClose.
       EXPECT_FALSE(main_frame) << func;
@@ -561,7 +563,9 @@ class OrderMainTestHandler : public RoutingTestHandler, public CefFrameHandler {
     got_before_close_ = true;
 
     EXPECT_TRUE(current_main_frame_);
-    current_main_frame_->OnBeforeClose(browser);
+    if (current_main_frame_) {
+      current_main_frame_->OnBeforeClose(browser);
+    }
 
     RoutingTestHandler::OnBeforeClose(browser);
   }
diff --git a/tests/ceftests/request_context_unittest.cc b/tests/ceftests/request_context_unittest.cc
index 894cca537..0f85cc83e 100644
--- a/tests/ceftests/request_context_unittest.cc
+++ b/tests/ceftests/request_context_unittest.cc
@@ -3,6 +3,7 @@
 // can be found in the LICENSE file.
 
 #include "include/base/cef_callback.h"
+#include "include/base/cef_weak_ptr.h"
 #include "include/cef_request_context.h"
 #include "include/cef_request_context_handler.h"
 #include "include/wrapper/cef_closure_task.h"
@@ -486,6 +487,11 @@ class PopupNavTestHandler : public TestHandler {
       AddResource(kPopupNavPopupUrl2, "<html>Popup2</html>", "text/html");
     }
 
+    // By default, TestHandler signals test completion when all CefBrowsers
+    // have closed. For this test we instead want to wait for an explicit call
+    // to DestroyTest before signaling test completion.
+    SetSignalTestCompletionCount(1U);
+
     CreateTestRequestContext(
         rc_mode_, rc_cache_path_,
         base::BindOnce(&PopupNavTestHandler::RunTestContinue, this));
@@ -609,9 +615,10 @@ class PopupNavTestHandler : public TestHandler {
 
       if (mode_ == DENY) {
         // Wait a bit to make sure the popup window isn't created.
-        CefPostDelayedTask(
-            TID_UI, base::BindOnce(&PopupNavTestHandler::DestroyTest, this),
-            200);
+        CefPostDelayedTask(TID_UI,
+                           base::BindOnce(&PopupNavTestHandler::DestroyTest,
+                                          weak_ptr_factory_.GetWeakPtr()),
+                           200);
       }
     } else if (url == kPopupNavPopupUrl) {
       EXPECT_FALSE(got_popup_load_end_);
@@ -664,8 +671,9 @@ class PopupNavTestHandler : public TestHandler {
     }
 
     if (destroy_test) {
-      CefPostTask(TID_UI,
-                  base::BindOnce(&PopupNavTestHandler::DestroyTest, this));
+      // This may race with OnBeforeClose() for the remaining browser.
+      CefPostTask(TID_UI, base::BindOnce(&PopupNavTestHandler::DestroyTest,
+                                         weak_ptr_factory_.GetWeakPtr()));
     }
   }
 
@@ -714,8 +722,14 @@ class PopupNavTestHandler : public TestHandler {
       EXPECT_TRUE(got_popup_load_end2_);
     }
 
-    // Will trigger destruction of all remaining browsers.
+    // Invalidate WeakPtrs now as |this| may be deleted on a different thread.
+    weak_ptr_factory_.InvalidateWeakPtrs();
+
+    // Will trigger destruction of any remaining browsers.
     TestHandler::DestroyTest();
+
+    // Allow the the test to complete once all browsers are gone.
+    SignalTestCompletion();
   }
 
   const TestMode mode_;
@@ -733,6 +747,8 @@ class PopupNavTestHandler : public TestHandler {
   TrackCallback got_popup_load_error2_;
   TrackCallback got_popup_load_end2_;
 
+  base::WeakPtrFactory<PopupNavTestHandler> weak_ptr_factory_{this};
+
   IMPLEMENT_REFCOUNTING(PopupNavTestHandler);
 };
 
diff --git a/tests/ceftests/scheme_handler_unittest.cc b/tests/ceftests/scheme_handler_unittest.cc
index 1a59ec9ea..1f51539de 100644
--- a/tests/ceftests/scheme_handler_unittest.cc
+++ b/tests/ceftests/scheme_handler_unittest.cc
@@ -1437,7 +1437,7 @@ TEST(SchemeHandlerTest, CustomStandardXHRDifferentOriginSync) {
   EXPECT_TRUE(test_results.got_read);
   EXPECT_TRUE(test_results.got_output);
   EXPECT_TRUE(test_results.got_sub_request);
-  EXPECT_TRUE(test_results.got_sub_read);
+  EXPECT_FALSE(test_results.got_sub_read);
   EXPECT_FALSE(test_results.git_exit_success);
 
   ClearTestSchemes(&test_results);
@@ -1470,7 +1470,7 @@ TEST(SchemeHandlerTest, CustomStandardXHRDifferentOriginAsync) {
   EXPECT_TRUE(test_results.got_read);
   EXPECT_TRUE(test_results.got_output);
   EXPECT_TRUE(test_results.got_sub_request);
-  EXPECT_TRUE(test_results.got_sub_read);
+  EXPECT_FALSE(test_results.got_sub_read);
   EXPECT_FALSE(test_results.git_exit_success);
 
   ClearTestSchemes(&test_results);
@@ -1503,7 +1503,7 @@ TEST(SchemeHandlerTest, CustomStandardFetchDifferentOrigin) {
   EXPECT_TRUE(test_results.got_read);
   EXPECT_TRUE(test_results.got_output);
   EXPECT_TRUE(test_results.got_sub_request);
-  EXPECT_TRUE(test_results.got_sub_read);
+  EXPECT_FALSE(test_results.got_sub_read);
   EXPECT_FALSE(test_results.git_exit_success);
 
   ClearTestSchemes(&test_results);
@@ -1676,7 +1676,7 @@ TEST(SchemeHandlerTest, HttpXHRDifferentOriginSync) {
   EXPECT_TRUE(test_results.got_read);
   EXPECT_TRUE(test_results.got_output);
   EXPECT_TRUE(test_results.got_sub_request);
-  EXPECT_TRUE(test_results.got_sub_read);
+  EXPECT_FALSE(test_results.got_sub_read);
   EXPECT_FALSE(test_results.git_exit_success);
 
   ClearTestSchemes(&test_results);
@@ -1709,7 +1709,7 @@ TEST(SchemeHandlerTest, HttpXHRDifferentOriginAsync) {
   EXPECT_TRUE(test_results.got_read);
   EXPECT_TRUE(test_results.got_output);
   EXPECT_TRUE(test_results.got_sub_request);
-  EXPECT_TRUE(test_results.got_sub_read);
+  EXPECT_FALSE(test_results.got_sub_read);
   EXPECT_FALSE(test_results.git_exit_success);
 
   ClearTestSchemes(&test_results);
@@ -1743,7 +1743,7 @@ TEST(SchemeHandlerTest, HttpFetchDifferentOriginAsync) {
   EXPECT_TRUE(test_results.got_read);
   EXPECT_TRUE(test_results.got_output);
   EXPECT_TRUE(test_results.got_sub_request);
-  EXPECT_TRUE(test_results.got_sub_read);
+  EXPECT_FALSE(test_results.got_sub_read);
   EXPECT_FALSE(test_results.git_exit_success);
 
   ClearTestSchemes(&test_results);
@@ -2311,7 +2311,7 @@ TEST(SchemeHandlerTest, CustomStandardXHRDifferentOriginRedirectSync) {
   EXPECT_TRUE(test_results.got_output);
   EXPECT_TRUE(test_results.got_sub_redirect);
   EXPECT_TRUE(test_results.got_sub_request);
-  EXPECT_TRUE(test_results.got_sub_read);
+  EXPECT_FALSE(test_results.got_sub_read);
   EXPECT_FALSE(test_results.git_exit_success);
 
   ClearTestSchemes(&test_results);
@@ -2346,7 +2346,7 @@ TEST(SchemeHandlerTest, CustomStandardXHRDifferentOriginRedirectAsync) {
   EXPECT_TRUE(test_results.got_output);
   EXPECT_TRUE(test_results.got_sub_redirect);
   EXPECT_TRUE(test_results.got_sub_request);
-  EXPECT_TRUE(test_results.got_sub_read);
+  EXPECT_FALSE(test_results.got_sub_read);
   EXPECT_FALSE(test_results.git_exit_success);
 
   ClearTestSchemes(&test_results);
@@ -2382,7 +2382,7 @@ TEST(SchemeHandlerTest, CustomStandardFetchDifferentOriginRedirect) {
   EXPECT_TRUE(test_results.got_output);
   EXPECT_TRUE(test_results.got_sub_redirect);
   EXPECT_TRUE(test_results.got_sub_request);
-  EXPECT_TRUE(test_results.got_sub_read);
+  EXPECT_FALSE(test_results.got_sub_read);
   EXPECT_FALSE(test_results.git_exit_success);
 
   ClearTestSchemes(&test_results);
diff --git a/tests/ceftests/values_unittest.cc b/tests/ceftests/values_unittest.cc
index 565674e1b..6ac10ed74 100644
--- a/tests/ceftests/values_unittest.cc
+++ b/tests/ceftests/values_unittest.cc
@@ -266,6 +266,8 @@ void TestDictionary(CefRefPtr<CefDictionaryValue> value,
 
   // Test the size.
   EXPECT_EQ(0U, value->GetSize());
+  // Should be a no-op.
+  EXPECT_TRUE(value->Clear());
 
   // Re-add some values.
   TestDictionaryNull(value);
diff --git a/tests/ceftests/views/panel_unittest.cc b/tests/ceftests/views/panel_unittest.cc
index 8f2bf66ad..82bf189be 100644
--- a/tests/ceftests/views/panel_unittest.cc
+++ b/tests/ceftests/views/panel_unittest.cc
@@ -757,6 +757,10 @@ void ChildThemeImpl() {
   // Restore the default background color for the global theme.
   window->SetThemeColor(CEF_ColorPrimaryBackground, default_color);
   EXPECT_EQ(default_color, window->GetThemeColor(CEF_ColorPrimaryBackground));
+
+  // Close the windows to avoid dangling references.
+  window->Close();
+  new_window->Close();
 }
 
 }  // namespace