Edge 141 beta web platform release notes (#3555)

* New beta web platform release notes

* Finalized relnotes content

* In-article TOC

* Fix md tagging

* Writer/Editor pass

* sdk expect dates

* New beta web platform release notes

* Writer/Editor pass, format

* toc entry

* linkfix

* Edit pass for new features

* OTs

* escape length

* Writer/Editor review pass

* New beta web platform release notes

* Sort features and clean them up

* More formatting

* cont'd

* webrtc audiolevel

* cont'd

* cont'd

* browser bound keys

* Done with most content

* toc

* add todo's for clarif

* see also todos

* links

* Revert "links"

This reverts commit e456df6.

* addressed todos

* nits

* link

* fix date

* cap'z JS

* New beta web platform release notes

* Add TOC entry

* In progress rewrite and formatting

* Done with content changes

* detailed content

* escape code in link text

* Remove local network access as it's not shipping in 140

* Writer/Editor pass

* linkfix

* New beta web platform release notes

* toc, some cleanup

* technical editing of 141 items

* detailed content

* fix link

* finished writer/editor pass

* likely date

* Address comments

* Clarified syntax

---------

Co-authored-by: captainbrosset <[email protected]>
Co-authored-by: Michael S. Hoffman <[email protected]>

Author: captainbrosset

microsoft-edge/toc.yml

@@ -30,6 +30,10 @@
           href: ./web-platform/release-notes/index.md
           displayName: what's new, announcements
 
+        - name: Microsoft Edge 141
+          href: ./web-platform/release-notes/141.md
+          displayName: Microsoft Edge 141 web platform release notes (Oct. 2025)  # page title
+
         - name: Microsoft Edge 140
           href: ./web-platform/release-notes/140.md
           displayName: Microsoft Edge 140 web platform release notes (Sep. 2025)  # page title

microsoft-edge/web-platform/release-notes/138.md

@@ -35,7 +35,6 @@ To stay up-to-date and get the latest web platform features, download a preview
     * [Predictable reported storage quota](#predictable-reported-storage-quota)
     * [`pushsubscriptionchange` event upon resubscription](#pushsubscriptionchange-event-upon-resubscription)
     * [Speculation rules: `target_hint` field](#speculation-rules-target_hint-field)
-    * [Strict Same-origin policy for Storage Access API](#strict-same-origin-policy-for-storage-access-api)
     * [Viewport Segments Enumeration API](#viewport-segments-enumeration-api)
     * [Web app scope extensions](#web-app-scope-extensions)
   * [Removed features](#removed-features)
@@ -266,17 +265,6 @@ See also:
 * [Speculation Rules API](https://developer.mozilla.org/docs/Web/API/Speculation_Rules_API) at MDN.
 
 
-<!-- ---------- -->
-###### Strict Same-origin policy for Storage Access API
-
-The Storage Access API now follows the Same-origin policy.
-
-By default, using `document.requestStorageAccess()` in a frame only attaches cookies to the requests that are made to the iframe's origin.  The `CookiesAllowedForUrls` policy and storage access headers can still be used to unblock cross-site cookies.
-
-See also:
-* [Storage Access API](https://developer.mozilla.org/docs/Web/API/Storage_Access_API) at MDN.
-
-
 <!-- ---------- -->
 ###### Viewport Segments Enumeration API
 

microsoft-edge/web-platform/release-notes/139.md

@@ -23,7 +23,6 @@ To stay up-to-date and get the latest web platform features, download a preview
     * [CSS `font-width` property](#css-font-width-property)
     * [Continue running transitions when switching to initial transition value](#continue-running-transitions-when-switching-to-initial-transition-value)
     * [CSS `corner-shape` property](#css-corner-shape-property)
-    * [Support `width` and `height` presentational attributes on nested `<svg>` elements](#support-width-and-height-presentational-attributes-on-nested-svg-elements)
   * [Web APIs](#web-apis)
     * [`request-close` invoker command](#request-close-invoker-command)
     * [Allow more characters in JavaScript DOM APIs](#allow-more-characters-in-javascript-dom-apis)
@@ -58,19 +57,13 @@ To stay up-to-date and get the latest web platform features, download a preview
 <!-- ====================================================================== -->
 ## Edge DevTools
 
-See [What's New in Microsoft Edge DevTools](../../devtools/whats-new/whats-new.md).
-<!-- todo: when it exists in Aug 2025, use instead:
 See [What's New in DevTools (Microsoft Edge 139)](../../devtools/whats-new/2025/08/devtools-139.md).
--->
 
 
 <!-- ====================================================================== -->
 ## WebView2
 
-See [Release Notes for the WebView2 SDK](../../webview2/release-notes/index.md).
-<!-- todo: when exists in Aug 2025, use instead:
-For WebView2, see [1.0.n.n](../../webview2/release-notes/index.md#10nnnnnn) in _Release Notes for the WebView2 SDK_ (Aug 2025).
--->
+See [1.0.3405.78](../../webview2/release-notes/index.md#10340578) in _Release Notes for the WebView2 SDK_ (Aug 2025).
 
 
 <!-- ====================================================================== -->
@@ -134,37 +127,6 @@ See also:
 * [Corner Shaping: the corner-shape property](https://drafts.csswg.org/css-borders-4/#corner-shaping) in _CSS Borders and Box Decorations Module Level 4_.
 
 
-<!-- ---------- -->
-###### Support `width` and `height` presentational attributes on nested `<svg>` elements
-
-You can now use the `width` and `height` presentational attributes on nested `<svg>` elements, through both SVG markup and CSS.  This approach provides greater flexibility, allowing you to style SVG elements more efficiently within complex designs.
-
-With this feature, the following two HTML code snippets now produce the same output:
-
-```html
-<svg width="100px" height="100px">
-  <svg style="width:50px;height:50px;">
-    <circle cx="50px" cy="50px" r="40px" fill="green" />
-  </svg>
-</svg>
-```
-
-```html
-<svg width="100px" height="100px">
-  <svg width="50px" height="50px">
-    <circle cx="50px" cy="50px" r="40px" fill="green" />
-  </svg>
-</svg>
-```
-
-In the second line:
-* The first example uses a `style` attribute that contains width and height values.
-* The second example uses separate `width` and `height` attributes.
-
-See also:
-* [`<svg>`](https://developer.mozilla.org/docs/Web/SVG/Reference/Element/svg) at MDN.
-
-
 <!-- ------------------------------ -->
 #### Web APIs
 

microsoft-edge/web-platform/release-notes/140.md

@@ -31,14 +31,12 @@ To stay up-to-date and get the latest web platform features, download a preview
     * [CSS `width` and `height` support for SVG `<use>` element](#css-width-and-height-support-for-svg-use-element)
     * [Support `download` attribute in SVG `<a>` element](#support-download-attribute-in-svg-a-element)
   * [Web APIs](#web-apis)
-    * [`ariaNotify()` API](#arianotify-api)
     * [`__Http-` and `__HostHttp-` cookie name prefixes](#__http--and-__hosthttp--cookie-name-prefixes)
     * [`overscroll-behavior` propagation from `<html>` to the viewport](#overscroll-behavior-propagation-from-html-to-the-viewport)
     * [`min` option for `ReadableStreamBYOBReader.read(view)`](#min-option-for-readablestreambyobreaderreadview)
     * [`container` option for `scrollIntoView()`](#container-option-for-scrollintoview)
     * [Service worker static routing API timings](#service-worker-static-routing-api-timings)
     * [SharedWorker script inherit controllers for Blob URLs](#sharedworker-script-inherit-controllers-for-blob-urls)
-    * [`restrictOwnAudio` media track constraint](#restrictownaudio-media-track-constraint)
     * [Popover ToggleEvent source attribute](#popover-toggleevent-source-attribute)
     * [Convert Uint8Array between base64 and hex formats](#convert-uint8array-between-base64-and-hex-formats)
     * [`highlightsFromPoint` API](#highlightsfrompoint-api)
@@ -48,7 +46,7 @@ To stay up-to-date and get the latest web platform features, download a preview
   * [Microsoft Edge-only origin trials](#microsoft-edge-only-origin-trials)
     * [Web app scope extensions](#web-app-scope-extensions)
     * [MS High Contrast Deprecation](#ms-high-contrast-deprecation)
-    * [AriaNotify API](#arianotify-api-1)
+    * [AriaNotify API](#arianotify-api)
     * [Acquisition Info API](#acquisition-info-api)
 
 
@@ -66,7 +64,7 @@ See [What's New in DevTools (Microsoft Edge 140)](../../devtools/whats-new/2025/
 
 See [Release Notes for the WebView2 SDK](../../webview2/release-notes/index.md).
 <!-- todo: when exists in Sep 2025, use instead:
-For WebView2, see [1.0.n.n](../../webview2/release-notes/index.md#10nnnnnn) in _Release Notes for the WebView2 SDK_ (Sep 2025).
+See [1.0.n.n](../../webview2/release-notes/index.md#10nnnnnn) in _Release Notes for the WebView2 SDK_ (Sep 2025).
 -->
 
 
@@ -276,15 +274,6 @@ See also:
 #### Web APIs
 
 
-<!-- ---------- -->
-###### `ariaNotify()` API
-
-The `ariaNotify()` API enables your app to directly tell a screen reader what to say when there's a non-user-initiated change in the content of a webpage.  In the simplest scenario, you call `ariaNotify("foo")` on the document or on an element.
-
-See also:
-* [Creating a more accessible web with Aria Notify](https://blogs.windows.com/msedgedev/2025/05/05/creating-a-more-accessible-web-with-aria-notify/).
-
-
 <!-- ---------- -->
 ###### `__Http-` and `__HostHttp-` cookie name prefixes
 
@@ -364,19 +353,6 @@ See also:
 * [Blob](https://developer.mozilla.org/docs/Web/API/Blob) at MDN.
 
 
-<!-- ---------- -->
-###### `restrictOwnAudio` media track constraint
-
-
-The new `restrictOwnAudio` media track constraint can help create cleaner screen recordings, such as when the capturing webpage itself is playing audio and you don't want that audio to be included in the capture, to avoid undesirable echo.
-
-By default, when using `getDisplayMedia()` and when the system audio is captured, all audio that's played by the system is captured.  If the `restrictOwnAudio` constraint is set, the captured system audio is filtered to exclude audio originating from the document that called `getDisplayMedia()`.
-
-See also:
-* [MediaDevices: getDisplayMedia() method](https://developer.mozilla.org/docs/Web/API/MediaDevices/getDisplayMedia) at MDN.
-* [MediaTrackConstraints](https://developer.mozilla.org/docs/Web/API/MediaTrackConstraints) at MDN.
-
-
 <!-- ---------- -->
 ###### Popover ToggleEvent `source` attribute