main to live June 30, 2026

microsoft-edge/devtools/whats-new/index.md

@@ -14,6 +14,22 @@ To check out the latest features of Microsoft Edge DevTools and the Microsoft Ed
 
 What's new articles correspond to historical releases of Microsoft Edge, and are not updated over time.  References to "new features" and "experiments" might become outdated as new versions of Microsoft Edge are released.
 
+<!-- maint:
+toc.yml - add new what's new page, move a what's new page to archive
+/devtools/whats-new/index.md - add new what's new page, remove earliest what's new page -->
+* [What's new in DevTools (Microsoft Edge 149)](./149.md)
+* [What's new in DevTools (Microsoft Edge 148)](./148.md)
+* [What's new in DevTools (Microsoft Edge 147)](./147.md)
+* [What's new in DevTools (Microsoft Edge 146)](./146.md)
+* [What's new in DevTools (Microsoft Edge 145)](./145.md)
+* [What's new in DevTools (Microsoft Edge 144)](./144.md)
+* [What's new in DevTools (Microsoft Edge 143)](./143.md)
+* [What's new in DevTools (Microsoft Edge 142)](./2025/10/devtools-142.md)
+* [What's new in DevTools (Microsoft Edge 141)](./2025/10/devtools-141.md)
+* [What's new in DevTools (Microsoft Edge 140)](./2025/09/devtools-140.md)
+
+For earlier What's new pages, see **Archive** in the table of contents.
+
 
 <!-- ====================================================================== -->
 ## Download the preview channels

microsoft-edge/toc.yml

@@ -30,6 +30,14 @@
           href: ./web-platform/release-notes/index.md
           displayName: what's new, announcements
 
+          # latest 10
+          # maint:
+          # toc.yml - add new relnotes page, move a relnotes page to archive
+          # /web-platform/release-notes/index.md - add new relnotes page, remove earliest relnotes page
+        - name: Microsoft Edge 151
+          href: ./web-platform/release-notes/151.md
+          displayName: Microsoft Edge 151 web platform release notes (Aug. 2026)  # page title
+
         - name: Microsoft Edge 150
           href: ./web-platform/release-notes/150.md
           displayName: Microsoft Edge 150 web platform release notes (Jul. 2026)  # page title
@@ -65,13 +73,13 @@
         - name: Microsoft Edge 142
           href: ./web-platform/release-notes/142.md
           displayName: Microsoft Edge 142 web platform release notes (Oct. 2025)  # page title
-
-        - name: Microsoft Edge 141
-          href: ./web-platform/release-notes/141.md
-          displayName: Microsoft Edge 141 web platform release notes (Oct. 2025)  # page title
         # keep 10 items above
         - name: Archive
           items:
+            - 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
@@ -166,7 +174,11 @@
             - name: What's new in Microsoft Edge DevTools
               href: ./devtools/whats-new/index.md
               displayName: release notes, announcements
-# latest 10 What's new
+
+              # latest 10
+              # maint:
+              # toc.yml - add new what's new page, move a what's new page to archive
+              # /devtools/whats-new/index.md - add new what's new page, remove earliest what's new page
             - name: Microsoft Edge 149
               href: ./devtools/whats-new/149.md
               displayName: What's new in DevTools (Microsoft Edge 149)  # page title

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

@@ -49,7 +49,6 @@ To stay up-to-date and get the latest web platform features, download a preview
   * [Web Serial API on Android](#web-serial-api-on-android)
   * [WebXR Layers](#webxr-layers)
   * [WebXR Plane Detection](#webxr-plane-detection)
-  * [XML parsing in Rust for non-XSLT scenarios](#xml-parsing-in-rust-for-non-xslt-scenarios)
 * [Deprecated or removed features](#deprecated-or-removed-features)
   * [Remove inline XSLT for production of SVG](#remove-inline-xslt-for-production-of-svg)
 * [Origin trials](#origin-trials)
@@ -427,20 +426,6 @@ See also:
 * [WebXR Device API](https://developer.mozilla.org/docs/Web/API/WebXR_Device_API) at MDN.
 
 
-<!-- ------------------------------ -->
-#### XML parsing in Rust for non-XSLT scenarios
-
-Microsoft Edge now uses a Rust-based XML parser, in scenarios where XSLT processing isn't required.
-
-The Rust XML parser improves security by eliminating memory-corruption bugs in XML parsing.  This applies to:
-* The DOMParser Web API.
-* `responseXML` of `XMLHttpRequest`.
-* SVG documents.
-
-See also:
-* [DOMParser](https://developer.mozilla.org/docs/Web/API/DOMParser) at MDN.
-
-
 <!-- ====================================================================== -->
 ## Deprecated or removed features
 

microsoft-edge/web-platform/release-notes/150.md

@@ -28,7 +28,6 @@ To stay up-to-date and get the latest web platform features, download a preview
    * [Comma-separated container queries](#comma-separated-container-queries)
    * [Expose unprintable areas via CSS](#expose-unprintable-areas-via-css)
    * [Media element pseudo-classes](#media-element-pseudo-classes)
-   * [CSS `alpha()` function](#css-alpha-function)
    * [`named-feature()` function for CSS @supports](#named-feature-function-for-css-supports)
    * [`overscroll-behavior: chain`](#overscroll-behavior-chain)
    * [`flex-wrap:balance`](#flex-wrapbalance)
@@ -38,7 +37,6 @@ To stay up-to-date and get the latest web platform features, download a preview
    * [Updating all `<selectedcontent>` element in a customizable `<select>`](#updating-all-selectedcontent-element-in-a-customizable-select)
    * [Streaming out-of-order HTML](#streaming-out-of-order-html)
 * [Web APIs](#web-apis)
-   * [Expose the `FontFaceSet` interface globally](#expose-the-fontfaceset-interface-globally)
    * [Disable SVG filters on cross-origin iframes and plugins](#disable-svg-filters-on-cross-origin-iframes-and-plugins)
    * [`MediaStreamTrackProcessor` frame counters](#mediastreamtrackprocessor-frame-counters)
    * [Opaque origin for `data:` URLs](#opaque-origin-for-data-urls)
@@ -228,17 +226,6 @@ See also:
 * [`:volume-locked` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:volume-locked) at MDN.
 
 
-<!-- ------------------------------ -->
-#### CSS `alpha()` function
-
-The CSS `alpha()` function creates a new color by applying a specified alpha value to an existing color.
-
-For example, `alpha(from red / 0.5)` creates a semi-transparent red color with 50% opacity.
-
-See also:
-* [Relative Alpha Colors](https://drafts.csswg.org/css-color-5/#relative-alpha) in _CSS Color Module Level 5_.
-
-
 <!-- ------------------------------ -->
 #### `named-feature()` function for CSS `@supports`
 
@@ -357,17 +344,6 @@ See also:
 The following new Web API features are included in Microsoft Edge.
 
 
-<!-- ------------------------------ -->
-#### Expose the `FontFaceSet` interface globally
-
-Previously, the `FontFaceSet` interface was not exposed as a global property.  Chromium's interface definition language (IDL) for `FontFaceSet` previously incorrectly applied `LegacyNoInterfaceObject` to `FontFaceSet`, hiding it as a global property.
-
-This change aligns Chromium with the CSS Font Loading spec, and with Safari and Firefox.
-
-See also:
-* [FontFaceSet](https://developer.mozilla.org/docs/Web/API/FontFaceSet) at MDN.
-
-
 <!-- ------------------------------ -->
 #### Disable SVG filters on cross-origin iframes and plugins