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Preview Runtime 155.0.4283.13 (Sep. 24, 2026)

Release notes for Microsoft Edge WebView2 Preview Runtime, release date: Sep. 24, 2026.

This is a Preview Runtime, for early testing. Prerelease testing of WebView2 SDKs uses a preview channel of Microsoft Edge (Beta, Dev, or Canary), which includes the WebView2 Preview Runtime.

These release notes are for the WebView2 Preview Runtime, which corresponds to the Beta preview channel of Microsoft Edge. We recommend testing your app using the Beta preview channel of Microsoft Edge, before these changes are promoted to Stable. If you want to test even earlier, you can test against Edge Dev or Edge Canary.

See Prerelease testing using preview channels of Microsoft Edge.

In addition to the following WebView2 Runtime improvements, you can also use the new web platform features from Microsoft Edge 155; see Microsoft Edge 155 web platform release notes (Oct. 8, 2026).

Bug fixes

  • Fixed incorrect viewport in minimal mode.
  • Fixed JAWS support in minimal window.

See also

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