RelNotes: Preview Runtime 155, Stable Runtime 154

[Michael Hoffman (mikehoffms)]

Rendered article sections for review:

• Preview Runtime 155.n.nnnn.nn (Mmm. dd, yyyy)

  • /webview2/release-notes/runtime/155.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/webview2/release-notes/runtime/155?branch=pr-en-us-3947
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/webview2/release-notes/runtime/155
  • New page.

• Runtime 154.0.nnnn.nn (Sep. nn, 2026)

  • /webview2/release-notes/runtime/154.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/webview2/release-notes/runtime/154?branch=pr-en-us-3947
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/webview2/release-notes/runtime/154
  • Changed from Preview Runtime content to Stable Runtime content.

• Release notes for the WebView2 Runtime

  • /webview2/release-notes/runtime/index.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/webview2/release-notes/runtime/index?branch=pr-en-us-3947
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/webview2/release-notes/runtime/
  • Changelist:

• SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)

  • /webview2/release-notes/sdk/1-0-4255-prerelease.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease?branch=pr-en-us-3947
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease
  • Changelist:

• toc.yml

  • Changelist:

• Microsoft Edge 154 web platform release notes (Sep. 2026)

  • /web-platform/release-notes/154.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/release-notes/154?branch=pr-en-us-3947
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/web-platform/release-notes/154
  • Changelist:

AB#64107057

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 and severity-2 issues. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

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[learn-build-service-prod]

Learn Build status updates of commit ce98739:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/toc.yml	✅Succeeded	View
microsoft-edge/web-platform/release-notes/154.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/runtime/154.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/runtime/155.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/runtime/index.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md	✅Succeeded	View

For more details, please refer to the build report.

[learn-build-service-prod]

PoliCheck Scan Report

The following report lists PoliCheck issues in PR files. Before you merge the PR, you must fix all severity-1 and severity-2 issues. The AI Review Details column lists suggestions for either removing or replacing the terms. If you find a false positive result, mention it in a PR comment and include this text: #policheck-false-positive. This feedback helps reduce false positives in future scans.

✅ No issues found

More information about PoliCheck

Information: PoliCheck | Severity Guidance | Term
For any questions: Try searching the learn.microsoft.com contributor guides or post your question in the Learn support channel.

[learn-build-service-prod]

Learn Build status updates of commit d21a392:

💡 Validation status: suggestions

File	Status	Preview URL	Details
microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md	💡Suggestion	View	Details
microsoft-edge/toc.yml	✅Succeeded	View
microsoft-edge/web-platform/release-notes/154.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/runtime/154.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/runtime/155.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/runtime/index.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/sdk/1-0-4022-49.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/sdk/index.md	✅Succeeded	View

microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md

• Line 0, Column 0: [Suggestion: filename-incomplete - See documentation] The filename contains an incomplete word, misspelled word, acronym, or abbreviation that is disallowed.

For more details, please refer to the build report.

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