Microsoft Edge 147 web platform release notes (Apr. 2026) (#3739) (#3745)

* New web platform release notes for 147

* First edit pass

* Fix recent changes in versions

* spec link

* origin trials

* fixed and simplified fetching origin trial

* fix proofreader link

* ms.date

* writer pass 145, 146

* writer/editor pass 147

* Removed sections about feature not shipping

* fixed toc

* Update microsoft-edge/web-platform/release-notes/147.md

* Update microsoft-edge/web-platform/release-notes/147.md

* Add removal of inline XSLT for SVG production to site-impacting changes

* sep lists

* move table cell

---------

Co-authored-by: captainbrosset <captainbrosset@users.noreply.github.com>
Co-authored-by: Michael Hoffman <45407486+mikehoffms@users.noreply.github.com>

Author: captainbrosset

.gitignore

@@ -14,3 +14,4 @@ node_modules
 .env
 
 release-notes-comparison-report.md
+test-release-notes.md

microsoft-edge/toc.yml

@@ -30,6 +30,10 @@
           href: ./web-platform/release-notes/index.md
           displayName: what's new, announcements
 
+        - name: Microsoft Edge 147
+          href: ./web-platform/release-notes/147.md
+          displayName: Microsoft Edge 147 web platform release notes (Apr. 2026)  # page title
+
         - name: Microsoft Edge 146
           href: ./web-platform/release-notes/146.md
           displayName: Microsoft Edge 146 web platform release notes (Mar. 2026)  # page title
@@ -66,13 +70,13 @@
           href: ./web-platform/release-notes/138.md
           displayName: Microsoft Edge 138 web platform release notes (Jun. 2025)  # page title
 
-        - name: Microsoft Edge 137
-          href: ./web-platform/release-notes/137.md
-          displayName: Microsoft Edge 137 web platform release notes (May 2025)  # page title
-
         # keep 10 items above
         - name: Archive
           items:
+            - name: Microsoft Edge 137
+              href: ./web-platform/release-notes/137.md
+              displayName: Microsoft Edge 137 web platform release notes (May 2025)  # page title
+
             - name: Microsoft Edge 136
               href: ./web-platform/release-notes/136.md
               displayName: Microsoft Edge 136 web platform release notes (May 2025)  # page title

microsoft-edge/web-platform/release-notes/135.md

@@ -364,7 +364,7 @@ The Digital Goods API allows a web application to get information about their di
 
 * [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/PwaDigitalGoods/explainer.md)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=Digital+Goods%20API,OriginTrialFeedback&title=%5BDigital%20Goods%20API%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/4b4a9ead-d912-4349-87b3-25e5e50b4f13)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4b4a9ead-d912-4349-87b3-25e5e50b4f13)
 
 
 
@@ -377,7 +377,7 @@ Web App LocalFolder Access allows a Microsoft Store-installed Progressive Web Ap
 
 * [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/LocalFolder/explainer.md)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=LocalFolder+Access,OriginTrialFeedback&title=%5BLocalFolder%20Access%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/2b21a8cd-43aa-41da-810d-fad103e699dc)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/2b21a8cd-43aa-41da-810d-fad103e699dc)
 
 
 
@@ -390,7 +390,7 @@ The `handwriting` attribute provides a per-document and per-element way to contr
 
 * [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Handwriting/explainer.md)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=Handwriting,OriginTrialFeedback&title=%5BHandwriting%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/36b56357-0271-4e89-a091-3be27184808a)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/36b56357-0271-4e89-a091-3be27184808a)
 
 
 <!-- ---------- -->
@@ -402,7 +402,7 @@ The Acquisition Info API supports 3P acquisition attribution for PWAs that were
 
 * [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/AcquisitionInfo/explainer.md)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=Acquisition+Info,OriginTrialFeedback&amp;title=%5BAcquisition%20Info%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
 
 
 <!-- ====================================================================== -->

microsoft-edge/web-platform/release-notes/136.md

@@ -309,7 +309,7 @@ The following Web API features have been deprecated (still supported, but not re
 <!-- ---------- -->
 ###### Deprecate the `AutomaticHttpsDefault` policy
 
-The `AutomaticHttpsDefault` policy is supported but discouraged in Microsoft Edge 136, and is planned to be removed in Microsoft Edge 139.  Instead, use the new `HttpsUpgradesEnabled`<!-- todo: add link to the new policy on https://learn.microsoft.com/en-us/deployedge/microsoft-edge-update-policies when available --> policy, which is available starting in Microsoft Edge version 136.
+The `AutomaticHttpsDefault` policy is supported but discouraged in Microsoft Edge 136, and is planned to be removed in Microsoft Edge 139.  Instead, use the new `HttpsUpgradesEnabled`<!-- todo: add link to the new policy on https://learn.microsoft.com/deployedge/microsoft-edge-update-policies when available --> policy, which is available starting in Microsoft Edge version 136.
 
 
 <!-- ====================================================================== -->
@@ -375,7 +375,7 @@ The Acquisition Info API supports 3P acquisition attribution for PWAs that were
 
 * [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/AcquisitionInfo/explainer.md)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=Acquisition+Info,OriginTrialFeedback&amp;title=%5BAcquisition%20Info%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
 
 
 <!-- ---------- -->
@@ -389,7 +389,7 @@ See [Deprecating support for -ms-high-contrast and -ms-high-contrast-adjust](htt
 
 * [Explainer](https://blogs.windows.com/msedgedev/2024/04/29/deprecating-ms-high-contrast/)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=MS+High%20Contrast,OriginTrialFeedback&title=%5BMS%20High%20Contrast%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/fa44c0d7-cb20-490b-97fa-e2559b918759)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/fa44c0d7-cb20-490b-97fa-e2559b918759)
 
 
 <!-- ====================================================================== -->

microsoft-edge/web-platform/release-notes/137.md

@@ -395,7 +395,7 @@ Currently, `HTMLMediaElements` and `AudioContexts` media elements are supported.
 
 * [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/IframeMediaPause/iframe_media_pausing.md)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?assignees=gabrielbrito&labels=Iframe+Media+Playback+Pause&title=%5BIframe+Media+Playback+Pause%5D+%3CTITLE+HERE%3E)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/4d251c7a-1324-4943-a9ba-7ad5526f16fd)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4d251c7a-1324-4943-a9ba-7ad5526f16fd)
 
 
 <!-- ------------------------------ -->
@@ -437,7 +437,7 @@ The origins that are listed in the `scope_extensions` member must confirm that t
 
 * [Explainer](https://github.com/WICG/manifest-incubations/blob/gh-pages/scope_extensions-explainer.md)
 * [Feedback](https://github.com/WICG/manifest-incubations/issues)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/559ac296-8237-4480-bd25-865b2802ca95)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/559ac296-8237-4480-bd25-865b2802ca95)
 
 
 <!-- ---------- -->
@@ -449,7 +449,7 @@ The Acquisition Info API supports 3P acquisition attribution for PWAs that were
 
 * [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/AcquisitionInfo/explainer.md)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=Acquisition+Info,OriginTrialFeedback&amp;title=%5BAcquisition%20Info%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
 
 
 <!-- ---------- -->
@@ -463,7 +463,7 @@ See [Deprecating support for -ms-high-contrast and -ms-high-contrast-adjust](htt
 
 * [Explainer](https://blogs.windows.com/msedgedev/2024/04/29/deprecating-ms-high-contrast/)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=MS+High%20Contrast,OriginTrialFeedback&title=%5BMS%20High%20Contrast%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/fa44c0d7-cb20-490b-97fa-e2559b918759)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/fa44c0d7-cb20-490b-97fa-e2559b918759)
 
 
 <!-- ====================================================================== -->

microsoft-edge/web-platform/release-notes/141.md

@@ -294,7 +294,7 @@ The Ad Selection API provides user-relevant ads on your site without using third
 
 * [Explainer](https://github.com/WICG/privacy-preserving-ads/blob/main/Ad%20Selection%20Overview.md)
 * [Feedback](https://github.com/WICG/privacy-preserving-ads/issues/new?labels=Ad+Selection%20API,OriginTrialFeedback&title=%5BAd%20Selection%20API%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/ffe94e9d-436d-46e6-9144-43abd7bf8c75)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/ffe94e9d-436d-46e6-9144-43abd7bf8c75)
 
 
 <!-- ---------- -->

microsoft-edge/web-platform/release-notes/142.md

@@ -182,7 +182,7 @@ Previously, desktop devices rendered `<select multiple size="1">` as a list show
 ## SVG features
 <!-- https://developer.mozilla.org/docs/Web/SVG -->
 
-Below are the new Scalable Vector Graphics (SVG) features in Microsoft Edge.
+The following new Scalable Vector Graphics (SVG) features are supported in Microsoft Edge.
 
 
 <!-- ------------------------------ -->

microsoft-edge/web-platform/release-notes/144.md

@@ -380,7 +380,7 @@ The Web Install API allows websites to install other websites as web apps on the
 
 * [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/WebInstall/explainer.md)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?template=web-install-api.md)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/bcf7d28f-6bdf-45d8-9207-63c97a042407)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/bcf7d28f-6bdf-45d8-9207-63c97a042407)
 
 
 <!-- ------------------------------ -->
@@ -392,7 +392,7 @@ The Acquisition Info API supports 3P acquisition attribution for PWAs that are a
 
 * [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/AcquisitionInfo/explainer.md)
 * [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=Acquisition+Info,OriginTrialFeedback&amp;title=%5BAcquisition%20Info%5D+Feedback)
-* [Register](https://developer.microsoft.com/en-us/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
+* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
 
 
 <!-- ====================================================================== -->