134 web platform release notes

[captainbrosset]

Rendered article for review:

• Microsoft Edge 134 web platform release notes (Mar. 2025)

  • /web-platform/release-notes/134.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/release-notes/134?branch=pr-en-us-3365
  • External preview: https://github.com/MicrosoftDocs/edge-developer/blob/web-platform-release-notes/microsoft-edge/web-platform/release-notes/134.md
  • Planned live: https://learn.microsoft.com/microsoft-edge/web-platform/release-notes/134
  • New article.

• Microsoft Edge 133 web platform release notes (Feb. 2025)

  • /web-platform/release-notes/133.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/release-notes/133?branch=pr-en-us-3365
  • External preview: https://github.com/MicrosoftDocs/edge-developer/blob/web-platform-release-notes/microsoft-edge/web-platform/release-notes/133.md
  • Before/live: https://learn.microsoft.com/microsoft-edge/web-platform/release-notes/133
  • Disambiguated dates format.

• Site compatibility-impacting changes coming to Microsoft Edge > Earlier versions

  • /web-platform/site-impacting-changes.md
  • Internal preview: https://review.learn.microsoft.com/microsoft-edge/web-platform/site-impacting-changes?branch=pr-en-us-3365&tabs=earlier#earlier-versions
  • External preview: https://github.com/MicrosoftDocs/edge-developer/blob/web-platform-release-notes/microsoft-edge/web-platform/site-impacting-changes.md#earlier-versions
  • Before/live: https://learn.microsoft.com/microsoft-edge/web-platform/site-impacting-changes?tabs=earlier#high-impact-changes
  • Removed "schedule ... Chromium".
  • Added AVIF row.
  • Added document.domain row.

• Updated the webplat relnotes script.

  • ~/scripts/web-platform-release-notes.js
  • https://github.com/MicrosoftDocs/edge-developer/blob/web-platform-release-notes/scripts/web-platform-release-notes.js
  • ~/scripts/beta-release-notes-template.njk
  • https://github.com/MicrosoftDocs/edge-developer/blob/web-platform-release-notes/scripts/beta-release-notes-template.njk

AB#56107171

[mikehoffms]

LGTM - Writer

[mikehoffms]

LGTM - Writer/Editor

[learn-build-service-prod]

Learn Build status updates of commit d7310f7:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/toc.yml	✅Succeeded	View
microsoft-edge/web-platform/release-notes/133.md	✅Succeeded	View
microsoft-edge/web-platform/release-notes/134.md	✅Succeeded	View
microsoft-edge/web-platform/site-impacting-changes.md	✅Succeeded	View
scripts/beta-release-notes-template.njk	✅Succeeded
scripts/web-platform-release-notes.js	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel