Prerelease SDK 1.0.3530-prerelease, for Runtime 141 (Sep. 8, 2025)

Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Sep. 8, 2025.

NuGet package for WebView2 SDK 1.0.3530-prerelease

For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 141.0.3530.0 or later; see Runtime 141.0.3537.50 (Oct. 6, 2025).

General changes

This Prerelease SDK focuses on making WebView2 work better, through behind-the-scenes improvements.

• The testing infrastructure has been strengthened.

• The validation of APIs has been enhanced, to ensure that the APIs perform reliably across different scenarios.

These foundational improvements provide stable, thoroughly tested functionality for building WebView2 apps.

Bug fixes

• Fixed a memory leak in WPF Composition Controller.

See also

• Runtime 141.0.3537.50 (Oct. 6, 2025)
• Release notes for WebView2
  • Release notes for the WebView2 Runtime
  • Release notes for WebView2 SDKs