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Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Jun. 11, 2026.
NuGet package for WebView2 SDK 1.0.4071-prerelease
For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 150.0.4071.0 or later; see Runtime 150.0.4078.44 (Jul. 7, 2026).
Deprecation of DevToolsProtocolExtension NuGet package
NuGet package for DevToolsProtocolExtension 1.0.2901
The Microsoft.Web.WebView2.DevToolsProtocolExtension NuGet package is being deprecated, and no further versions of this package will be published. This deprecation is not linked to any WebView2 Release SDK or Prerelease SDK.
The DevToolsProtocolExtension package provides a strongly-typed .NET wrapper over the Chrome DevTools Protocol (CDP) for use in WebView2 apps. The existing published versions (1.0.824, 1.0.2271, and 1.0.2901) remain available on NuGet Gallery and are not being removed.
See also:
Recommended alternative:
All CDP calls can be made directly via the WebView2 CDP APIs, without using the extension package. See Use the Chrome DevTools Protocol (CDP) in WebView2 apps and the following:
Bug fixes
Added total-count histograms for WebView2 environment and controller creation attempts.
Fixed container safety issues in WebView2 frame and listener code.
WinRT event subscription now keeps the projection wrapper alive until the handler is unsubscribed.