Runtime 154.0.4258.31 (Sep. 28, 2026)

Release notes for Microsoft Edge WebView2 Runtime, release date: Sep. 28, 2026.

In addition to the following WebView2 Runtime improvements, you can also use the new web platform features from Microsoft Edge 154; see Microsoft Edge 154 web platform release notes (Sep. 24, 2026).

Bug fixes

• Fixed downloads to be submitted for antivirus scanning under the host app's identity instead of the shared runtime's.
• Fixed Mark-of-the-Web prompt state so it is tracked per host app instead of per shared WebView2 runtime.
• Fixed the click propagation from the Window Controls Overlay (WCO) titlebar to webcontents.
• Fixed incorrect viewport in minimal mode.
• Fixed JAWS support in minimal window.

See also

• Release SDK 1.0.4258.31, for Runtime 154 (Sep. 28, 2026)
• Release notes for WebView2
  • Release notes for the WebView2 Runtime
  • Release notes for WebView2 SDKs
• Microsoft Edge 154 web platform release notes (Sep. 24, 2026)