New web platform release notes for 152

[Patrick Brosset (captainbrosset)]

Rendered articles for review:

• Microsoft Edge 152 web platform release notes (Aug. 2026)

  • /web-platform/release-notes/152.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/release-notes/152?branch=pr-en-us-3889
  • External preview: https://github.com/MicrosoftDocs/edge-developer/blob/web-platform-release-notes-152/microsoft-edge/web-platform/release-notes/152.md - links honor backtick format
  • Planned live: https://learn.microsoft.com/microsoft-edge/web-platform/release-notes/152
  • New article.

• Site compatibility-impacting changes coming to Microsoft Edge > High-impact changes

  • /web-platform/site-impacting-changes.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/site-impacting-changes?branch=pr-en-us-3889&tabs=latest#high-impact-changes
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/web-platform/site-impacting-changes?tabs=latest#high-impact-changes
  • Moved & revised the row Deprecate unload event.

• toc.yml

  • Added 152.
  • Archived 142.

• title > heading

  • /web-platform/release-notes/147.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/release-notes/147?branch=pr-en-us-3889
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/web-platform/release-notes/147
  • Changed "web page" to "webpage".
  • Removed h4 OpaqueRange.

• title > heading

  • /web-platform/release-notes/149.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/release-notes/149?branch=pr-en-us-3889
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/web-platform/release-notes/149
  • Changed "web page" to "webpage".
  • Removed h4 OpaqueRange for form control text.

• title > heading

  • /web-platform/release-notes/150.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/release-notes/150?branch=pr-en-us-3889
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/web-platform/release-notes/150
  • Removed h4 Media element pseudo-classes.
  • Changed "web page" to "webpage".

• title > heading

  • /web-platform/release-notes/151.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/release-notes/151?branch=pr-en-us-3889
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/web-platform/release-notes/151
  • Removed h4 CSS alpha() function.
  • Removed h4 Reference target.
  • Minor edits in OT cells.

• title > heading

  • /web-platform/release-notes/index.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/release-notes/index?branch=pr-en-us-3889
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/web-platform/release-notes/
  • Added 152 link.
  • Removed 142 link.

• title > heading

  • /webview2/release-notes/index.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/webview2/release-notes/index?branch=pr-en-us-3889
  • External preview:
  • Before/live: https://learn.microsoft.com/microsoft-edge/webview2/release-notes/
  • Changed "web page" to "webpage".

AB#63399865
AB#63414371 - Deprec. unload events

[Leo Lee (leotlee)]

Both 152 and 153 will have the 60% rollout to fast-follow Chrome's schedule, please update to reflect this.

[learn-build-service-prod]

Learn Build status updates of commit 76f9675:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/toc.yml	✅Succeeded	View
microsoft-edge/web-platform/release-notes/147.md	✅Succeeded	View
microsoft-edge/web-platform/release-notes/149.md	✅Succeeded	View
microsoft-edge/web-platform/release-notes/150.md	✅Succeeded	View
microsoft-edge/web-platform/release-notes/151.md	✅Succeeded	View
microsoft-edge/web-platform/release-notes/152.md	✅Succeeded	View
microsoft-edge/web-platform/release-notes/index.md	✅Succeeded	View
microsoft-edge/web-platform/site-impacting-changes.md	✅Succeeded	View
microsoft-edge/webview2/release-notes/index.md	✅Succeeded	View

For more details, please refer to the build report.

[Michael Hoffman (mikehoffms)]

LGTM - Writer/Editor