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Merge pull request #3441 from MicrosoftDocs/user/mikehoffms/wv2-relnotes-may-2025-prerelease (#3448)
WebView2 Release Notes for May 2025 Prerelease SDK Co-authored-by: Michael Hoffman <v-mihoffman@microsoft.com>
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microsoft-edge/webview2/release-notes/index.md

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ms.topic: conceptual
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ms.service: microsoft-edge
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ms.subservice: webview
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ms.date: 05/05/2025
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ms.date: 05/12/2025
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---
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# Release Notes for the WebView2 SDK
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<!-- end of May 2025 Release SDK -->
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<!-- May 2025 Prerelease SDK -->
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<!-- ====================================================================== -->
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## 1.0.3296-prerelease
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Release Date: May 12, 2025
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[NuGet package for WebView2 SDK 1.0.3296-prerelease](https://www.nuget.org/packages/Microsoft.Web.WebView2/1.0.3296-prerelease)
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For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 137.0.3296.0 or higher.
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<!-- ------------------------------ -->
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#### Experimental APIs
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No Experimental APIs have been added in this Prerelease SDK.
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<!-- ------------------------------ -->
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#### Promotions
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The following APIs have been promoted from Experimental to Stable in this Prerelease SDK.
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<!-- ---------- -->
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###### Set default background color on WebView2 initialization (DefaultBackgroundColor API)
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The DefaultBackgroundColor API allows users to set the `DefaultBackgroundColor` property at initialization. This prevents a disruptive white flash during the WebView2 loading process.
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##### [.NET/C#](#tab/dotnetcsharp)
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* `CoreWebView2ControllerOptions` Class:
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* [CoreWebView2ControllerOptions.DefaultBackgroundColor Property](/dotnet/api/microsoft.web.webview2.core.corewebview2controlleroptions.defaultbackgroundcolor?view=webview2-dotnet-1.0.3296-prerelease&preserve-view=true)
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##### [WinRT/C#](#tab/winrtcsharp)
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* `CoreWebView2ControllerOptions` Class:
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* [CoreWebView2ControllerOptions.DefaultBackgroundColor Property](/microsoft-edge/webview2/reference/winrt/microsoft_web_webview2_core/corewebview2controlleroptions?view=webview2-winrt-1.0.3296-prerelease&preserve-view=true#defaultbackgroundcolor)
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##### [Win32/C++](#tab/win32cpp)
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* [ICoreWebView2ControllerOptions3](/microsoft-edge/webview2/reference/win32/icorewebview2controlleroptions3?view=webview2-1.0.3296-prerelease&preserve-view=true)
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* [ICoreWebView2ControllerOptions3::get_DefaultBackgroundColor](/microsoft-edge/webview2/reference/win32/icorewebview2controlleroptions3?view=webview2-1.0.3296-prerelease&preserve-view=true#get_defaultbackgroundcolor)
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* [ICoreWebView2ControllerOptions3::put_DefaultBackgroundColor](/microsoft-edge/webview2/reference/win32/icorewebview2controlleroptions3?view=webview2-1.0.3296-prerelease&preserve-view=true#put_defaultbackgroundcolor)
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---
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<!-- ------------------------------ -->
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#### Bug fixes
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<!-- ---------- -->
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###### Runtime-only
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* Fixed the **Find** bar no longer appearing after the window is shifted.
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* Fixed a bug where the app wasn't able to cancel navigation to login pages via the `NavigationStarting` event.
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* Fixed an issue where downloads from within the default browser frame didn't complete. ([Issue #5196](https://github.com/MicrosoftEdge/WebView2Feedback/issues/5196))
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* Fixed an issue where the pipe name was incorrectly returned, leading to a crash in some UWP apps.
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<!-- end of May 2025 Prerelease SDK -->
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<!-- ====================================================================== -->
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## 1.0.3179.45

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