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diff --git a/microsoft-edge/progressive-web-apps/how-to/window-controls-overlay-images/hide-title-bar-icon.png b/microsoft-edge/progressive-web-apps/how-to/window-controls-overlay-images/hide-title-bar-icon.png
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diff --git a/microsoft-edge/progressive-web-apps/how-to/window-controls-overlay-images/wco-toggle-button.png b/microsoft-edge/progressive-web-apps/how-to/window-controls-overlay-images/wco-toggle-button.png
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diff --git a/microsoft-edge/progressive-web-apps/how-to/window-controls-overlay.md b/microsoft-edge/progressive-web-apps/how-to/window-controls-overlay.md
index a880a2e6e6..5755eed12d 100644
--- a/microsoft-edge/progressive-web-apps/how-to/window-controls-overlay.md
+++ b/microsoft-edge/progressive-web-apps/how-to/window-controls-overlay.md
@@ -6,7 +6,7 @@ ms.author: msedgedevrel
 ms.topic: article
 ms.service: microsoft-edge
 ms.subservice: pwa
-ms.date: 05/22/2024
+ms.date: 08/04/2026
 ---
 # Display content in the title bar area using Window Controls Overlay
 
@@ -45,20 +45,6 @@ See also:
 * [The web app manifest](https://developer.mozilla.org/docs/Web/Progressive_web_apps/Guides/Making_PWAs_installable#the_web_app_manifest) in _Making PWAs installable_ at MDN > References > Progressive web apps > Guides.
 
 
-<!-- ====================================================================== -->
-## Toggle the title bar
-
-When the Window Controls Overlay feature is enabled, the user can choose to have the title bar or not, by clicking the title bar toggle button:
-
-![Select the title bar toggle button](./window-controls-overlay-images/wco-toggle-button.png)
-
-Your code can't assume that the window controls overlay is displayed, because:
-* The user can choose whether to display the title bar.
-* Your app can also run in a web browser or on a mobile device, as well as running as a desktop app.
-
-Therefore, your code needs to react to title bar geometry changes.  To learn more, see [React to overlay changes](#react-to-overlay-changes).
-
-
 <!-- ====================================================================== -->
 ## Use CSS environment variables to stay clear of the overlay
 
@@ -166,14 +152,11 @@ if ('windowControlsOverlay' in navigator) {
 
    | Icon | Tooltip |
    | --- | --- |
-   | ![The "Hide title bar" icon](./window-controls-overlay-images/hide-title-bar-icon.png) | **Hide title bar** |
    | ![The "Settings and more" icon](./window-controls-overlay-images/settings-and-more-icon.png) | **Settings and more** |
    | ![The "Minimize" icon](./window-controls-overlay-images/minimize-icon.png) | **Minimize** |
    | ![The "Restore" icon](./window-controls-overlay-images/restore-icon.png) | **Restore** |
    | ![The "Close" icon](./window-controls-overlay-images/close-icon.png) | **Close** |
 
-1. In the title bar, click the **Hide title bar** (![The "Hide title bar" icon](./window-controls-overlay-images/hide-title-bar-icon.png)) button.
-
    The app now displays content all the way to the top of the window frame, where the title bar used to be:
 
    ![The top area of the map can be used to move the window](./window-controls-overlay-images/wco-draggable-titlebar.png)
diff --git a/microsoft-edge/toc.yml b/microsoft-edge/toc.yml
index 4ac8802079..4c9fb0e88c 100644
--- a/microsoft-edge/toc.yml
+++ b/microsoft-edge/toc.yml
@@ -34,6 +34,10 @@
           # 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 152
+          href: ./web-platform/release-notes/152.md
+          displayName: Microsoft Edge 152 web platform release notes (Aug. 2026)  # page title
+
         - name: Microsoft Edge 151
           href: ./web-platform/release-notes/151.md
           displayName: Microsoft Edge 151 web platform release notes (Jul. 2026)  # page title
@@ -69,13 +73,13 @@
         - name: Microsoft Edge 143
           href: ./web-platform/release-notes/143.md
           displayName: Microsoft Edge 143 web platform release notes (Dec. 2025)  # page title
-
-        - name: Microsoft Edge 142
-          href: ./web-platform/release-notes/142.md
-          displayName: Microsoft Edge 142 web platform release notes (Oct. 2025)  # page title
         # keep 10 items above
         - name: Archive
           items:
+            - 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
diff --git a/microsoft-edge/web-platform/release-notes/147.md b/microsoft-edge/web-platform/release-notes/147.md
index c529bd4e2f..b4fde697e7 100644
--- a/microsoft-edge/web-platform/release-notes/147.md
+++ b/microsoft-edge/web-platform/release-notes/147.md
@@ -31,7 +31,6 @@ To stay up-to-date and get the latest web platform features, download a preview
 * [Web APIs](#web-apis)
   * [Clear the `window.name` value for cross-site navigations that switch browsing context group](#clear-the-windowname-value-for-cross-site-navigations-that-switch-browsing-context-group)
   * [Device Bound Session Credentials](#device-bound-session-credentials)
-  * [OpaqueRange](#opaquerange)
   * [`<install>` HTML element](#install-html-element)
   * [Connection allowlists](#connection-allowlists)
   * [Autofill event](#autofill-event)
@@ -193,19 +192,6 @@ See also:
 * [Device Bound Session Credentials](https://w3c.github.io/webappsec-dbsc/)
 
 
-<!-- ------------------------------ -->
-#### OpaqueRange
-
-`OpaqueRange` represents a live text range inside text controls such as `<input>` and `<textarea>`.
-
-Use `OpaqueRange` to enable range-based operations, including:
-* Geometry queries.
-* Integration with highlighting workflows.
-
-See also:
-* [Range](https://developer.mozilla.org/docs/Web/API/Range) at MDN.
-
-
 <!-- ------------------------------ -->
 #### `<install>` HTML element
 
diff --git a/microsoft-edge/web-platform/release-notes/149.md b/microsoft-edge/web-platform/release-notes/149.md
index 8ece9d89df..280d19e835 100644
--- a/microsoft-edge/web-platform/release-notes/149.md
+++ b/microsoft-edge/web-platform/release-notes/149.md
@@ -28,7 +28,6 @@ To stay up-to-date and get the latest web platform features, download a preview
   * [User-action pseudo-classes top-layer boundary](#user-action-pseudo-classes-top-layer-boundary)
 * [Web APIs](#web-apis)
   * [Intl.Locale variants](#intllocale-variants)
-  * [`OpaqueRange` for form control text](#opaquerange-for-form-control-text)
   * [Migrate a PWA to a new origin](#migrate-a-pwa-to-a-new-origin)
   * [Distinguish payment handler errors in a payment request](#distinguish-payment-handler-errors-in-a-payment-request)
   * [`Request.isReloadNavigation` attribute](#requestisreloadnavigation-attribute)
@@ -134,7 +133,7 @@ See also:
 <!-- ------------------------------ -->
 #### Scope system accent color to installed web apps
 
-The `accent-color: auto` CSS value for form controls now applies the operating system's accent color only within installed web app contexts.  On regular web pages, form controls use a browser-default accent color instead.
+The `accent-color: auto` CSS value for form controls now applies the operating system's accent color only within installed web app contexts.  On regular webpages, form controls use a browser-default accent color instead.
 
 This change aligns the behavior of `accent-color: auto` with the `AccentColor` and `AccentColorText` CSS system color keywords, which are also scoped to installed web app contexts, to reduce fingerprinting.
 
@@ -184,22 +183,6 @@ See also:
 * [Intl.Locale](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale) at MDN.
 
 
-<!-- ------------------------------ -->
-#### `OpaqueRange` for form control text
-
-Use `OpaqueRange` to represent a live span of text within a form control's value, such as a `<textarea>` or text-based `<input>`.
-
-`OpaqueRange` enables the following for inline suggestions, highlights, and anchored popovers:
-* Operations such as `getBoundingClientRect()` and `getClientRects()`.
-* Integration with the CSS Custom Highlight API.
-
-`OpaqueRange` preserves encapsulation by exposing only value offsets, and returns `null` for `startContainer` and `endContainer`.
-
-See also:
-* [OpaqueRange](https://github.com/MicrosoftEdge/Demos/tree/main/opaque-range) at MicrosoftEdge/Demos.
-* [Try the OpaqueRange API. Stop using mirror divs to measure text positions in inputs!](https://www.youtube.com/watch?v=Sp9C68TZXiE) at YouTube.
-
-
 <!-- ------------------------------ -->
 #### Migrate a PWA to a new origin
 
diff --git a/microsoft-edge/web-platform/release-notes/150.md b/microsoft-edge/web-platform/release-notes/150.md
index 823f358a8a..c4b554da32 100644
--- a/microsoft-edge/web-platform/release-notes/150.md
+++ b/microsoft-edge/web-platform/release-notes/150.md
@@ -27,7 +27,6 @@ To stay up-to-date and get the latest web platform features, download a preview
    * [CSS `light-dark()` with image values](#css-light-dark-with-image-values)
    * [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)
    * [`named-feature()` function for CSS @supports](#named-feature-function-for-css-supports)
    * [`overscroll-behavior: chain`](#overscroll-behavior-chain)
    * [`flex-wrap:balance`](#flex-wrapbalance)
@@ -198,28 +197,6 @@ See also:
 * [Staying within the printable area: the `page-margin-safety` property](https://drafts.csswg.org/css-page-3/#page-margin-safety) in _CSS Paged Media Module Level 3_.
 
 
-<!-- ------------------------------ -->
-#### Media element pseudo-classes
-
-The following CSS pseudo-classes match `<audio>` and `<video>` elements based on their state:
-* `:playing`
-* `:paused`
-* `:seeking`
-* `:buffering`
-* `:stalled`
-* `:muted`
-* `:volume-locked`
-
-See also:
-* [`:playing` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:playing) at MDN.
-* [`:paused` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:paused) at MDN.
-* [`:seeking` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:seeking) at MDN.
-* [`:buffering` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:buffering) at MDN.
-* [`:stalled` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:stalled) at MDN.
-* [`:muted` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:muted) at MDN.
-* [`:volume-locked` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:volume-locked) at MDN.
-
-
 <!-- ------------------------------ -->
 #### `named-feature()` function for CSS `@supports`
 
@@ -468,7 +445,7 @@ For the full list of available origin trials, see [Microsoft Edge Origin Trials]
 | Prompt API sampling parameters | The `topK` and `temperature` sampling parameters let you optimize model behavior per language model session. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/32d0cd0f-611d-411e-b48e-cfd8edfdbf73) |
 | `<install>` HTML element | Declaratively install other websites as web apps by using the `<install>` element. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/b2eb5c7f-7df0-4ad9-950e-2fbd2ebc08ec) |
 | Declarative CSS Module Scripts | Shares declarative stylesheets with shadow roots, including declarative shadow roots, using inline style modules. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/966b04dd-3da4-43f4-a6a0-66a785f129f4) |
-| Gamepad raw input event | Instead of relying on frequent polling via `navigator.getGamepads()`, web pages can listen for `gamepadrawinputchanged` events.  These events are fired whenever changes are detected between input frames from the same device. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4ecdb530-835b-447d-b27e-0b3be8e0412b) |
+| Gamepad raw input event | Instead of relying on frequent polling via `navigator.getGamepads()`, webpages can listen for `gamepadrawinputchanged` events.  These events are fired whenever changes are detected between input frames from the same device. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4ecdb530-835b-447d-b27e-0b3be8e0412b) |
 | Autofill Event | Detects when browser autofill updates form controls, for adapting custom UI and validation. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/43534059-5696-4eaf-8bbd-eba4c4f86e88) |
 | WebAssembly Custom Descriptors V2 | Stores data associated with source-level types more efficiently, in custom descriptor objects. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/9c75e7f3-49cb-43de-9745-7458ff9c3689) |
 | WebMCP | Enables your site to register tools for an in-browser agent to complete tasks on behalf of a user. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/0b76fe60-b266-458e-a285-04e375c0c31a) |
diff --git a/microsoft-edge/web-platform/release-notes/151.md b/microsoft-edge/web-platform/release-notes/151.md
index ef43533e3a..f1a36e89a2 100644
--- a/microsoft-edge/web-platform/release-notes/151.md
+++ b/microsoft-edge/web-platform/release-notes/151.md
@@ -20,11 +20,9 @@ To stay up-to-date and get the latest web platform features, download a preview
 * [CSS features](#css-features)
    * [CSS `ruby-overhang` property](#css-ruby-overhang-property)
    * [Changed the `position-anchor` initial value to `normal`](#changed-the-position-anchor-initial-value-to-normal)
-   * [CSS `alpha()` function](#css-alpha-function)
    * [`animation-trigger` actions no longer auto-rewind](#animation-trigger-actions-no-longer-auto-rewind)
 * [HTML features](#html-features)
    * [`<usermedia>` element](#usermedia-element)
-   * [Reference target](#reference-target)
    * [`aria-actions` attribute](#aria-actions-attribute)
    * [`shadowrootslotassignment` attribute for declarative shadow DOM](#shadowrootslotassignment-attribute-for-declarative-shadow-dom)
 * [Web APIs](#web-apis)
@@ -89,17 +87,6 @@ See also:
 * [`position-area` CSS property](https://developer.mozilla.org/docs/Web/CSS/Reference/Properties/position-area) 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_.
-
-
 <!-- ------------------------------ -->
 #### `animation-trigger` actions no longer auto-rewind
 
@@ -130,30 +117,6 @@ See also:
 * [`<usermedia>` element](https://github.com/WICG/PEPC/blob/main/usermedia_element.md), in the "WICG / PEPC" repo.
 
 
-<!-- ------------------------------ -->
-#### Reference target
-
-The `referenceTarget` property of a `ShadowRoot` object forwards attributes such as `for`, `aria-labelledby`, `popovertarget`, and `commandfor` to elements inside a shadow DOM.  You can use this to, for example, link a `<label>` to its `<input>`, even if the `<input>` is in the shadow DOM of a web component.
-
-When a shadow host specifies an element in its shadow tree to act as its reference target, all ID references that point to the shadow host are forwarded to the reference target element instead.
-
-A reference target can also be set in HTML, by using the `shadowrootreferencetarget` attribute, like in the following example:
-
-```html
-<label for="my-checkbox">Checkbox value</label>
-<custom-checkbox id="my-checkbox">
-  <template shadowrootmode="open" shadowrootreferencetarget="real-checkbox">
-    <input id="real-checkbox" type="checkbox">
-  </template>
-</custom-checkbox>
-```
-
-See also:
-* [`referencetarget`](https://developer.mozilla.org/docs/Web/API/Element/attachShadow#referencetarget), in _Element: `attachShadow()` method_, at MDN.
-* [`Shadowroot.referencetarget`](https://developer.mozilla.org/docs/Web/API/ShadowRoot#shadowroot.referencetarget), in _`ShadowRoot`_, at MDN.
-* [`shadowrootreferencetarget`](https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/template#shadowrootreferencetarget), in _`<template>` HTML content template element_, at MDN.
-
-
 <!-- ------------------------------ -->
 #### `aria-actions` attribute
 
@@ -202,6 +165,23 @@ See also:
 The following new Web API features are included in Microsoft Edge.
 
 
+<!-- ------------------------------ -->
+#### Window Controls Overlay now hides the title bar by default
+
+The `display_override: ["window-controls-overlay"]` web application manifest member hides the default title bar that the browser displays at the top of the window (except the window control buttons), for an installed Progressive Web App.
+
+Before Microsoft Edge 151, installed web apps with `display_override: ["window-controls-overlay"]` initially displayed the default title bar, including a chevron (^ or v) button that users could click to enable the Window Controls Overlay.
+
+Starting with Edge 151:
+* The title bar is hidden by default.
+* The chevron button (the title bar toggle button) has been removed.
+* Installed web apps with `display_override: ["window-controls-overlay"]` can use that space within the title bar immediately (where the chevron button was), without requiring user action.
+
+See also:
+* [Window Controls Overlay API](https://developer.mozilla.org/docs/Web/API/Window_Controls_Overlay_API) at MDN.
+* [Display content in the title bar area using Window Controls Overlay](../../progressive-web-apps/how-to/window-controls-overlay.md).
+
+
 <!-- ------------------------------ -->
 #### Device event permission request API
 
@@ -371,22 +351,22 @@ For the full list of available origin trials, see [Microsoft Edge Origin Trials]
 | Web Install API | Allows a website to install another website as a web app by using `navigator.install()`. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/bcf7d28f-6bdf-45d8-9207-63c97a042407) |
 | `OpaqueRange` | Enables creating live ranges over text inside `<input>` and `<textarea>` elements that automatically update as the user edits.  These ranges support geometry methods such as `getBoundingClientRect()` and the CSS Custom Highlight API, which enables use cases such as caret-positioned popups and inline spell-check highlighting directly on form controls, without cloning elements or exposing internal DOM structure. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/5f4620e8-2969-4579-a5c6-304b8fae7200) |
 | Digital Credentials API - Issuance Support | Triggers issuance of user credentials from a credential issuer server to a digital wallet application. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/89fbbd25-ce49-43b6-a206-dd0909394ed8) |
-| `prerender_until_script` Speculation Rules API action | A Speculation Rules API action that prerenders a page but switches to prefetching when a script executes. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/b7fcdb4e-b3ab-4bbe-ba5a-0d4e655ad690) |
+| `prerender_until_script` Speculation Rules API action | A Speculation Rules API action that prerenders a page, but switches to prefetching when a script executes. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/b7fcdb4e-b3ab-4bbe-ba5a-0d4e655ad690) |
 | CPU Performance API | Exposes information about the user's device capabilities, for use with the Compute Pressure API. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/505dbb22-2d7f-4c91-9a2b-3913345a956e) |
 | Connection allowlists | Restricts connections from a document or worker to a server-distributed allowlist of endpoints. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/a20a4374-39fd-445f-9348-f6c8737a45de) |
 | `focus-without-user-activation` permissions policy | Gives an embedder control over programmatic focus from embedded content via the `focus-without-user-activation` permissions policy.  When the policy is denied for a frame, programmatic focus calls (`element.focus()`, `autofocus`, `window.focus()`, `dialog.showModal()`, and popover focusing) are blocked unless triggered by user activation, or focus is being delegated. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/e5a1d64f-b04b-453f-9550-6d12c1f6bc99) |
-| Enhanced Canvas TextMetrics | Expands the TextMetrics Canvas API with selection rectangles, bounding-box queries, and glyph-cluster operations. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/c4ab8844-e904-46c1-94b6-7e2b5c19bf3e) |
+| Enhanced Canvas TextMetrics | Expands the TextMetrics Canvas API, adding selection rectangles, bounding-box queries, and glyph-cluster operations. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/c4ab8844-e904-46c1-94b6-7e2b5c19bf3e) |
 | WebAudio Configurable Render Quantum | Lets you specify a custom render quantum size when creating an `AudioContext` or `OfflineAudioContext`. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/d5574838-d416-4242-81a8-7833c107b028) |
 | Prerendering cross-origin iframes | Prerenders cross-origin iframes via an opt-in response header, instead of delaying them until page activation. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/46c24517-496a-4a6b-a4d3-604b08620d43) |
 | Container Timing | Monitors when an annotated DOM container is displayed and has finished its initial paint. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/79fd2cd8-2283-4ed8-a472-4a8281a73d86) |
-| Separate style and layout durations in the Long Animation Frame API | Adds `styleDuration`, `forcedStyleDuration`, `layoutDuration`, and `forcedLayoutDuration` properties for deeper CSS performance analysis. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/349e23d8-799a-4ac2-b45a-ffb91e09b4ce) |
-| Prompt API sampling parameters | The `topK` and `temperature` sampling parameters let you optimize model behavior per language model session. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/32d0cd0f-611d-411e-b48e-cfd8edfdbf73) |
+| Separate style and layout durations in the Long Animation Frame API | Adds `styleDuration`, `forcedStyleDuration`, `layoutDuration`, and `forcedLayoutDuration` properties, for deeper CSS performance analysis. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/349e23d8-799a-4ac2-b45a-ffb91e09b4ce) |
+| Prompt API sampling parameters | The `topK` and `temperature` sampling parameters let you optimize model behavior per language-model session. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/32d0cd0f-611d-411e-b48e-cfd8edfdbf73) |
 | `<install>` HTML element | Declaratively install other websites as web apps by using the `<install>` element. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/b2eb5c7f-7df0-4ad9-950e-2fbd2ebc08ec) |
-| Declarative CSS Module Scripts | Shares declarative stylesheets with shadow roots, including declarative shadow roots, using inline style modules. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/966b04dd-3da4-43f4-a6a0-66a785f129f4) |
-| HTML in canvas | Enables rendering HTML in canvas with new drawing methods and the `paint` event. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/a297467e-0030-4c4c-8739-48e130026c03) |
-| Gamepad raw input event | Instead of relying on frequent polling via `navigator.getGamepads()`, web pages can listen for `gamepadrawinputchanged` events.  These events are fired whenever changes are detected between input frames from the same device. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4ecdb530-835b-447d-b27e-0b3be8e0412b) |
+| Declarative CSS Module Scripts | Shares declarative stylesheets with shadow roots, including declarative shadow roots, by using inline style modules. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/966b04dd-3da4-43f4-a6a0-66a785f129f4) |
+| HTML in canvas | Enables rendering HTML in canvas by using new drawing methods and the `paint` event. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/a297467e-0030-4c4c-8739-48e130026c03) |
+| Gamepad raw input event | Instead of relying on frequent polling via `navigator.getGamepads()`, webpages can listen for `gamepadrawinputchanged` events.  These events are fired whenever changes are detected between input frames from the same device. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4ecdb530-835b-447d-b27e-0b3be8e0412b) |
 | Autofill Event | Detects when browser autofill updates form controls, for adapting custom UI and validation. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/43534059-5696-4eaf-8bbd-eba4c4f86e88) |
-| WebAssembly Custom Descriptors V2 | Stores data associated with source-level types more efficiently, in custom descriptor objects. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/9c75e7f3-49cb-43de-9745-7458ff9c3689) |
+| WebAssembly Custom Descriptors V2 | Stores data that's associated with source-level types more efficiently, in custom descriptor objects. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/9c75e7f3-49cb-43de-9745-7458ff9c3689) |
 | Speculative Load measurement | `performance.speculations` exposes data about used and unused preloads, prefetches, and prerenders.  This helps you measure the effectiveness of speculative loading strategies and optimize performance-versus-cost tradeoffs. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/246de200-45d2-4f44-8047-001d385c90c5) |
 | WebMCP | Enables your site to register tools for an in-browser agent to complete tasks on behalf of a user. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/0b76fe60-b266-458e-a285-04e375c0c31a) |
 | Email Verification Protocol | Enables websites to verify email ownership by using cryptographic tokens that are issued by email providers.  This reduces reliance on email one-time passcodes (OTPs), and streamlines sign-up, sign-in, and recovery flows. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/683027d2-a798-460f-9b35-03a95002d9af) |
diff --git a/microsoft-edge/web-platform/release-notes/152.md b/microsoft-edge/web-platform/release-notes/152.md
new file mode 100644
index 0000000000..c9864ce638
--- /dev/null
+++ b/microsoft-edge/web-platform/release-notes/152.md
@@ -0,0 +1,356 @@
+---
+title: Microsoft Edge 152 web platform release notes (Aug. 2026)
+description: Microsoft Edge 152 web platform release notes (Aug. 2026)
+author: MSEdgeTeam
+ms.author: msedgedevrel
+ms.topic: article
+ms.service: microsoft-edge
+ms.date: 08/27/2026
+---
+# Microsoft Edge 152 web platform release notes (Aug. 2026)
+
+The following are the new web platform features and updates in Microsoft Edge 152, which releases on Aug. 27, 2026.
+
+To stay up-to-date and get the latest web platform features, download a preview channel of Microsoft Edge (Beta, Dev, or Canary); go to [Become a Microsoft Edge Insider](https://www.microsoft.com/edge/download/insider).
+
+**Detailed contents:**
+* [Microsoft Edge DevTools](#microsoft-edge-devtools)
+* [WebView2](#webview2)
+* [CSS features](#css-features)
+   * [CSS `alpha()` function](#css-alpha-function)
+   * [CSS `window-drag` property](#css-window-drag-property)
+   * [Media element pseudo-classes](#media-element-pseudo-classes)
+* [HTML features](#html-features)
+   * [`<camera>` and `<microphone>` elements](#camera-and-microphone-elements)
+   * [Reference target](#reference-target)
+   * [`autocorrect` global html attribute](#autocorrect-global-html-attribute)
+* [Web APIs](#web-apis)
+   * [Planned deprecation of the unload event](#planned-deprecation-of-the-unload-event)
+   * [`encryptionScheme` attribute for `navigator.mediaCapabilities.decodingInfo()`](#encryptionscheme-attribute-for-navigatormediacapabilitiesdecodinginfo)
+   * [CPU Performance API](#cpu-performance-api)
+   * [CSSPseudoElement support for `::backdrop`, `::scroll-marker`, and `::view-transitions`](#csspseudoelement-support-for-backdrop-scroll-marker-and-view-transitions)
+   * [Connection allowlists](#connection-allowlists)
+   * [`OpaqueRange` for form control text](#opaquerange-for-form-control-text)
+   * [WebGPU: Subgroup Size Control](#webgpu-subgroup-size-control)
+   * [`audioSelection:preferred` option for `getDisplayMedia()`](#audioselectionpreferred-option-for-getdisplaymedia)
+* [Origin trials](#origin-trials)
+
+
+<!-- ====================================================================== -->
+## Microsoft Edge DevTools
+
+See [What's new in Microsoft Edge DevTools](../../devtools/whats-new/index.md).
+<!-- todo: when exists, use instead:
+See [What's new in DevTools (Microsoft Edge 152)](../../devtools/whats-new/152.md).
+-->
+
+
+<!-- ====================================================================== -->
+## WebView2
+
+See [Release notes for the WebView2 SDK](../../webview2/release-notes/index.md).
+<!-- todo: when exists, use instead:
+See [Release SDK 1.0.nnnn.nn, for Runtime nnn](../../webview2/release-notes/index.md#10nnnnnn) (Aug. 2026) in _Release notes for the WebView2 SDK_.
+-->
+
+
+<!-- ====================================================================== -->
+## CSS features
+
+The following new Cascading Style Sheets (CSS) features are included in Microsoft Edge.
+
+
+<!-- ------------------------------ -->
+#### 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_.
+
+
+<!-- ------------------------------ -->
+#### CSS `window-drag` property
+
+When used in an installed Progressive Web App (PWA), the `window-drag` CSS property defines regions of the web app's UI that behave as draggable window title bar areas.
+
+When applied to an element, a click-and-drag pointer interaction moves the top-level application window.
+
+This is useful for PWAs that are installed on desktop operating systems and apps that use the Window Controls Overlay feature to implement custom title bars and draggable areas when the browser-provided title bar is hidden.
+
+The `window-drag` property standardizes and renames the existing `app-region` property.
+
+See also:
+* [Make a region a drag handle for the window](../../progressive-web-apps/how-to/window-controls-overlay.md#make-a-region-a-drag-handle-for-the-window) in _Display content in the title bar area using Window Controls Overlay_.
+* [Window Controls Overlay API](https://developer.mozilla.org/docs/Web/API/Window_Controls_Overlay_API) at MDN.
+
+
+<!-- ------------------------------ -->
+#### Media element pseudo-classes
+
+The following CSS pseudo-classes match `<audio>` and `<video>` elements based on their state:
+* `:playing`
+* `:paused`
+* `:seeking`
+* `:buffering`
+* `:stalled`
+* `:muted`
+* `:volume-locked`
+
+See also:
+* [`:playing` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:playing) at MDN.
+* [`:paused` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:paused) at MDN.
+* [`:seeking` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:seeking) at MDN.
+* [`:buffering` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:buffering) at MDN.
+* [`:stalled` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:stalled) at MDN.
+* [`:muted` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:muted) at MDN.
+* [`:volume-locked` CSS pseudo-class](https://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:volume-locked) at MDN.
+
+
+<!-- ====================================================================== -->
+## HTML features
+
+The following new HTML features are included in Microsoft Edge.
+
+
+<!-- ------------------------------ -->
+#### `<camera>` and `<microphone>` elements
+
+The `<camera>` and `<microphone>` HTML elements are browser-provided buttons that, upon activation, toggle camera or microphone streams.  If required, the button prompts the user to choose whether to grant the page access to the camera and microphone.
+
+The `<camera>` and `<microphone>` elements share the same underlying mechanism as the `<usermedia>` element, with one key distinction: they are designed to request a single capability:
+* The `<camera>` element specifically requests video capture.
+* The `<microphone>` element specifically requests audio capture.
+
+Like the `<usermedia>` element, the `<camera>` and `<microphone>` elements embed a browser-controlled, strictly styled UI into the page.  This ensures that there's a strong, intentional user signal, before a permission prompt is triggered or a stream is started.
+
+See also:
+* [`<usermedia>` element](./151.md#usermedia-element) in _Microsoft Edge 151 web platform release notes (Jul. 2026)_.
+
+
+<!-- ------------------------------ -->
+#### Reference target
+
+The `referenceTarget` property of a `ShadowRoot` object forwards attributes such as `for`, `aria-labelledby`, `popovertarget`, and `commandfor` to elements inside a shadow DOM.  For example, you can use this to link a `<label>` to its `<input>`, even if the `<input>` is in the shadow DOM of a web component.
+
+When a shadow host specifies an element in its shadow tree to act as its reference target, all ID references that point to the shadow host are forwarded to the reference target element instead.
+
+A reference target can also be set in HTML, by using the `shadowrootreferencetarget` attribute, like in the following example:
+
+```html
+<label for="my-checkbox">Checkbox value</label>
+<custom-checkbox id="my-checkbox">
+  <template shadowrootmode="open" shadowrootreferencetarget="real-checkbox">
+    <input id="real-checkbox" type="checkbox">
+  </template>
+</custom-checkbox>
+```
+
+See also:
+* [`referencetarget`](https://developer.mozilla.org/docs/Web/API/Element/attachShadow#referencetarget), in _Element: `attachShadow()` method_, at MDN.
+* [`Shadowroot.referencetarget`](https://developer.mozilla.org/docs/Web/API/ShadowRoot#shadowroot.referencetarget), in _`ShadowRoot`_, at MDN.
+* [`shadowrootreferencetarget`](https://developer.mozilla.org/docs/Web/HTML/Reference/Elements/template#shadowrootreferencetarget), in _`<template>` HTML content template element_, at MDN.
+
+
+<!-- ------------------------------ -->
+#### `autocorrect` global html attribute
+
+The `autocorrect` global HTML attribute controls whether to automatically correct spelling or punctuation errors for user input in `<input>` and `<textarea>` elements, and in elements with the `contenteditable` attribute.
+
+See also:
+* [autocorrect HTML global attribute](https://developer.mozilla.org/docs/Web/HTML/Reference/Global_attributes/autocorrect) at MDN.
+
+
+<!-- ====================================================================== -->
+## Web APIs
+
+The following new Web API features are included in Microsoft Edge.
+
+
+<!-- ------------------------------ -->
+#### Planned deprecation of the unload event
+<!-- todo: repeat this section in webplatform relnotes 153, 154, 155 -->
+
+<!-- keep top of section sync'd w/ "Deprecate unload event" row of [](../site-impacting-changes.md) -->
+
+Edge 152 will introduce the new `unload` Permission-Policy, to allow creating unload event listeners.  The default value is initially `allow`, but between Edge 152 and Edge 155, the default value will gradually be migrated to `deny`, such that unload handlers stop firing on pages, unless a page explicitly opts in to re-enable them.  To explicitly enable unload event handlers, use the `allow` value.
+
+* Edge 152: Unload handlers will stop firing by default for 60% of page loads, unless the site explicitly enables unload handlers via the `unload` Permission-Policy.
+* Edge 154: Increases to 80% of page loads.
+* Edge 155: Increases to 100% of page loads.
+
+This change is happening in the Chromium project, on which Microsoft Edge is based.
+
+<!-- end of content to sync -->
+
+The unload event isn't a dependable way to do the following, because browsers and operating systems can suspend or terminate pages without firing the unload event:
+* Save data.
+* Perform cleanup.
+* Report the end of a session.
+
+Using the unload event can also prevent pages from using the back/forward cache, which might make back and forward navigation slower.
+
+You should migrate to lifecycle events and APIs that are designed for the above scenarios.  The long-term direction of the web platform is to remove support for the unload event.
+
+See also:
+* [Intent to Deprecate: Deprecate unload event](https://groups.google.com/a/chromium.org/g/blink-dev/c/dvusqw9-IhI/m/SBkm_u1RAQAJ)
+* The **Deprecate unload event** row in [Site compatibility-impacting changes coming to Microsoft Edge](../site-impacting-changes.md).
+
+
+<!-- ------------------------------ -->
+#### `encryptionScheme` attribute for `navigator.mediaCapabilities.decodingInfo()`
+
+In addition to the `contentType` and `robustness` attributes, you can now use the `encryptionScheme` attribute when querying media capabilities by using `navigator.mediaCapabilities.decodingInfo()`.
+
+This allows you to determine whether a specific combination of codec, robustness, and encryption scheme is supported on the user's device, and therefore detect whether your encrypted media will play.
+
+See also:
+* [Encrypted Media Extensions API](https://developer.mozilla.org/docs/Web/API/Encrypted_Media_Extensions_API) at MDN.
+* [MediaCapabilities: decodingInfo() method](https://developer.mozilla.org/docs/Web/API/MediaCapabilities/decodingInfo) at MDN.
+
+
+<!-- ------------------------------ -->
+#### CPU Performance API
+
+The CPU Performance API lets you determine the CPU performance of the user's device.  You can use this information to provide an improved user experience, possibly in combination with the Compute Pressure API.
+
+The Compute Pressure API provides information about the user device's CPU pressure or utilization and allows applications to react to changes in CPU pressure.
+
+See also:
+* [CPU Performance API](https://github.com/WICG/cpu-performance).
+* [Compute Pressure API](https://developer.mozilla.org/docs/Web/API/Compute_Pressure_API) at MDN.
+
+
+<!-- ------------------------------ -->
+#### CSSPseudoElement support for `::backdrop`, `::scroll-marker`, and `::view-transitions`
+
+The `CSSPseudoElement` interface represents a CSS pseudo-element, and can be obtained by calling `Element.pseudo()` or `CSSPseudoElement.pseudo()`.
+
+The `CSSPseudoElement` interface now supports the `::backdrop`, `::scroll-marker`, and `::view-transitions` pseudo-elements, in addition to the `::after`, `::before`, and `::marker` pseudo-elements.
+
+Using the `CSSPseudoElement` interface with these new pseudo-elements enables you to do the following:
+
+* `::backdrop`: Useful for closing a dialog when the backdrop is clicked, without interfering with clicks inside the dialog's content. This eliminates the need for complex intersection logic to determine where the click occurred.
+
+* `::scroll-marker`: Useful for collecting click statistics.
+
+* `::view-transitions`: Allows you to intercept a view transition mid-flight to start a new view transition, utilizing the coordinates of the currently animating element to avoid sudden visual jumps.
+
+See also:
+* [CSSPseudoElement](https://developer.mozilla.org/docs/Web/API/CSSPseudoElement) at MDN.
+* [Element: pseudo() method](https://developer.mozilla.org/docs/Web/API/Element/pseudo) at MDN.
+* [CSSPseudoElement: pseudo() method](https://developer.mozilla.org/docs/Web/API/CSSPseudoElement/pseudo) at MDN.
+
+
+<!-- ------------------------------ -->
+#### Connection allowlists
+
+Connection allowlists let you declare and enforce explicit allowlists for network endpoints that can be reached by networking APIs such as the Fetch API.  This improves outbound network control, and reduces the risk of unintended connections.
+
+The list of authorized endpoints is distributed from the server through the `Connection-Allowlist` HTTP response header.  Before connecting to a server, the browser evaluates the destination against this allowlist.  Connections to verified endpoints are permitted, but destinations that fail to match entries in the allowlist are blocked.
+
+See also:
+* [Connection Allowlists](https://github.com/WICG/connection-allowlists)
+* [Fetch API](https://developer.mozilla.org/docs/Web/API/Fetch_API) at MDN.
+
+
+<!-- todo: wait for confirmation from the PWA team that this applies to Edge too; check "detailed contents"
+<!-- ------------------------------
+#### Notification attribution for PWAs on macOS
+
+When a Progressive Web App (PWA) is installed on macOS, the notifications that are sent by the PWA are now attributed to the PWA instead of to Microsoft Edge.  The notification now shows the PWA name and icon in the Notification Center, instead of showing the Microsoft Edge name and icon.
+
+To better match native macOS notifications, the following changes were also made:
+
+* Microsoft Edge no longer supports the `requireInteraction` field for notifications.  On macOS, the user controls whether the notification is temporary or persistent, on a per-app basis.
+* The Badging API now requires notifications permissions for the app badge to be displayed.  If the user doesn't grant notifications permission, the API will do nothing.
+
+See also:
+* [Notifications API](https://developer.mozilla.org/docs/Web/API/Notifications_API) at MDN.
+* [Notification: requireInteraction property](https://developer.mozilla.org/docs/Web/API/Notification/requireInteraction) at MDN.
+* [Badging API](https://developer.mozilla.org/docs/Web/API/Badging_API) at MDN.
+-->
+
+
+<!-- ------------------------------ -->
+#### `OpaqueRange` for form control text
+
+Use `OpaqueRange` to represent a live span of text within a form control's value, such as a `<textarea>` or text-based `<input>`.
+
+`OpaqueRange` enables to do the following with ranges of text:
+* Operations such as `getBoundingClientRect()` and `getClientRects()`.
+* Integration with the CSS Custom Highlight API.
+
+This enables scenarios such as inline suggestions, highlights, and anchored popovers.
+
+`OpaqueRange` preserves encapsulation by exposing only value offsets, and returns `null` for `startContainer` and `endContainer`.
+
+See also:
+* [OpaqueRange](https://github.com/MicrosoftEdge/Demos/tree/main/opaque-range) at MicrosoftEdge/Demos.
+* [Try the OpaqueRange API. Stop using mirror divs to measure text positions in inputs!](https://www.youtube.com/watch?v=Sp9C68TZXiE) at YouTube.
+* [Range](https://developer.mozilla.org/docs/Web/API/Range) at MDN.
+
+
+<!-- ------------------------------ -->
+#### WebGPU: subgroup size control
+
+The GPU `subgroup-size-control` feature allows you to explicitly set the subgroup size in a compute shader.
+
+This is useful when you need to optimize the performance of a compute shader on certain platforms, such as for AI workloads.
+
+See also:
+* [WebGPU API](https://developer.mozilla.org/docs/Web/API/WebGPU_API) at MDN.
+* [subgroups](https://gpuweb.github.io/gpuweb/#subgroups) in the WebGPU specification.
+
+
+<!-- ------------------------------ -->
+#### `audioSelection:preferred` option for `getDisplayMedia()`
+
+The `getDisplayMedia()` method now supports the `audioSelection:preferred` option.
+
+This option allows you to indicate to the browser that you prefer audio sharing along with video.
+
+See also:
+* [MediaDevices: getDisplayMedia() method](https://developer.mozilla.org/docs/Web/API/MediaDevices/getDisplayMedia) at MDN.
+
+
+<!-- ====================================================================== -->
+## Origin trials
+
+The following are origin trials for new experimental APIs that are available in Microsoft Edge.
+
+Origin trials let you try experimental APIs on your own live website for a limited time.  To learn more about origin trials, see [Use origin trials in Microsoft Edge](../../origin-trials/index.md).
+
+For the full list of available origin trials, see [Microsoft Edge Origin Trials](https://developer.microsoft.com/microsoft-edge/origin-trials/).
+
+| Name | Description | Register |
+|---|---|---|
+| Soft navigation heuristics | Exposes soft-navigation heuristics for collecting performance metrics in single-page apps. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/ec952482-49f0-4980-a451-13ea3f9a7220) |
+| URL and eval hashes in CSP script-src | Introduces url- and eval- hashes for `script-src` CSP directives, replacing hostname-based allowlists and `unsafe-eval`. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/6bd50a0d-6f30-425f-beba-034be41bb013) |
+| `<install>` HTML element | Declaratively install other websites as web apps by using the `<install>` element. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/b2eb5c7f-7df0-4ad9-950e-2fbd2ebc08ec) |
+| `focus-without-user-activation` permissions policy | Gives an embedder control over programmatic focus from embedded content via the `focus-without-user-activation` permissions policy.  When the policy is denied for a frame, programmatic focus calls (`element.focus()`, `autofocus`, `window.focus()`, `dialog.showModal()`, and popover focusing) are blocked unless triggered by user activation, or focus is being delegated. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/e5a1d64f-b04b-453f-9550-6d12c1f6bc99) |
+| Enhanced Canvas TextMetrics | Expands the TextMetrics Canvas API, adding selection rectangles, bounding-box queries, and glyph-cluster operations. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/c4ab8844-e904-46c1-94b6-7e2b5c19bf3e) |
+| WebAudio Configurable Render Quantum | Lets you specify a custom render quantum size when creating an `AudioContext` or `OfflineAudioContext`. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/d5574838-d416-4242-81a8-7833c107b028) |
+| Container Timing | Monitors when an annotated DOM container is displayed and has finished its initial paint. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/79fd2cd8-2283-4ed8-a472-4a8281a73d86) |
+| Separate style and layout durations in the Long Animation Frame API | Adds `styleDuration`, `forcedStyleDuration`, `layoutDuration`, and `forcedLayoutDuration` properties, for deeper CSS performance analysis. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/349e23d8-799a-4ac2-b45a-ffb91e09b4ce) |
+| Prompt API sampling parameters | The `topK` and `temperature` sampling parameters let you optimize model behavior per language-model session. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/32d0cd0f-611d-411e-b48e-cfd8edfdbf73) |
+| Declarative CSS Module Scripts | Shares declarative stylesheets with shadow roots, including declarative shadow roots, by using inline style modules. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/966b04dd-3da4-43f4-a6a0-66a785f129f4) |
+| Digital Credentials API - Issuance Support | Triggers issuance of user credentials from a credential issuer server to a digital wallet application. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/89fbbd25-ce49-43b6-a206-dd0909394ed8) |
+| `prerender_until_script` Speculation Rules API action | A Speculation Rules API action that prerenders a page, but switches to prefetching when a script executes. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/b7fcdb4e-b3ab-4bbe-ba5a-0d4e655ad690) |
+| HTML in canvas | Enables rendering HTML in a canvas by using new drawing methods and the `paint` event. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/a297467e-0030-4c4c-8739-48e130026c03) |
+| Gamepad raw input event | Instead of relying on frequent polling via `navigator.getGamepads()`, webpages can listen for `gamepadrawinputchanged` events.  These events are fired whenever changes are detected between input frames from the same device. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4ecdb530-835b-447d-b27e-0b3be8e0412b) |
+| WebMCP | Enables your site to register tools for an in-browser agent to complete tasks on behalf of a user. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/0b76fe60-b266-458e-a285-04e375c0c31a) |
+| Autofill Event | Detects when browser autofill updates form controls, for adapting custom UI and validation. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/43534059-5696-4eaf-8bbd-eba4c4f86e88) |
+| Email Verification Protocol | Enables websites to verify email ownership by using cryptographic tokens that are issued by email providers.  This reduces reliance on email one-time passcodes (OTPs), and streamlines sign-up, sign-in, and recovery flows. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/683027d2-a798-460f-9b35-03a95002d9af) |
+| Prerendering cross-origin iframes | Prerenders cross-origin iframes via an opt-in response header, instead of delaying them until page activation. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/46c24517-496a-4a6b-a4d3-604b08620d43) |
+| WebAssembly Custom Descriptors V2 | Stores data that's associated with source-level types more efficiently, in custom descriptor objects. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/9c75e7f3-49cb-43de-9745-7458ff9c3689) |
+| Speculative Load measurement | `performance.speculations` exposes data about used and unused preloads, prefetches, and prerenders.  This helps you measure the effectiveness of speculative loading strategies and optimize performance-versus-cost tradeoffs. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/246de200-45d2-4f44-8047-001d385c90c5) |
+| Additional WebCrypto algorithms | Enables usage of additional WebCrypto algorithms, including a few PQ algorithms.  Algorithms enabled: ChaCha20-Poly1305, ML-DSA-44, ML-DSA-65, ML-DSA-87, ML-KEM-768, ML-KEM-1024, MLKEM768-X25519. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/f5dbdb03-9776-4ee2-9560-4d68733c7531) |
+| WebRTC Data Channel: SCTP Negotiation Acceleration Protocol (SNAP) | SNAP reduces WebRTC data channel startup latency by embedding SCTP connection setup parameters in the SDP offer/answer exchange.  Because WebRTC already uses DTLS to establish a secure channel, the separate SCTP handshake can be avoided, saving up to two network round trips and enabling faster data channel establishment. | [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/fd803c89-97ff-4d0d-bc23-641b6041cb12) |
+
+
+<!-- ====================================================================== -->
+> [!NOTE]
+> Portions of this page are modifications based on work created and shared by Chromium.org and used according to terms described in the [Creative Commons Attribution 4.0 International License](https://creativecommons.org/licenses/by/4.0).
diff --git a/microsoft-edge/web-platform/release-notes/index.md b/microsoft-edge/web-platform/release-notes/index.md
index f55c8bc058..12132593fc 100644
--- a/microsoft-edge/web-platform/release-notes/index.md
+++ b/microsoft-edge/web-platform/release-notes/index.md
@@ -16,6 +16,7 @@ To stay up-to-date and get the latest web platform features, download a preview
 <!-- 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 -->
+* [Microsoft Edge 152 web platform release notes (Aug. 2026)](./152.md)
 * [Microsoft Edge 151 web platform release notes (Jul. 2026)](./151.md)
 * [Microsoft Edge 150 web platform release notes (Jul. 2026)](./150.md)
 * [Microsoft Edge 149 web platform release notes (Jun. 2026)](./149.md)
@@ -25,7 +26,6 @@ toc.yml - add new relnotes page, move a relnotes page to archive
 * [Microsoft Edge 145 web platform release notes (Feb. 2026)](./145.md)
 * [Microsoft Edge 144 web platform release notes (Jan. 2026)](./144.md)
 * [Microsoft Edge 143 web platform release notes (Dec. 2025)](./143.md)
-* [Microsoft Edge 142 web platform release notes (Oct. 2025)](./142.md)
 
 For earlier release notes, see **Archive** in the table of contents.
 
diff --git a/microsoft-edge/web-platform/site-impacting-changes.md b/microsoft-edge/web-platform/site-impacting-changes.md
index 0d34df6f87..a629fa063d 100644
--- a/microsoft-edge/web-platform/site-impacting-changes.md
+++ b/microsoft-edge/web-platform/site-impacting-changes.md
@@ -35,8 +35,8 @@ This table lists high-impact changes which the Microsoft Edge team is tracking c
 | Change | Release | Description |
 | --- | --- | --- |
 | Insecure downloads over HTTP | Future release (TBD) | When a user tries to download potentially dangerous content from an HTTP site, the user will receive a UI warning, such as "Insecure download blocked."  The user will still have an option to proceed and download the item.  Admins can use the `InsecureContentAllowedForUrls` policy to specify HTTP sites for which the warning will be suppressed.  Admins can use the `InsecureDownloadWarnings` feature flag to test the impact of this upcoming feature. |
-| Deprecate unload event | Future release (TBD) | Introduces a new Permission-Policy to allow creating unload event listeners. The default policy is `allow`, but the default policy will gradually be migrated to `deny`, such that unload handlers stop firing on pages, unless a page explicitly opts in to re-enable them.  This change is happening in the Chromium project, on which Microsoft Edge is based.  For more information, see [Intent to Deprecate: Deprecate unload event](https://groups.google.com/a/chromium.org/g/blink-dev/c/dvusqw9-IhI/m/SBkm_u1RAQAJ). |
 | Deprecation of XSLT | Future release (TBD) | XSLT support represents a disproportionate attack surface, and the Chromium project which Microsoft Edge is based on has announced plans to disable and ultimately remove XSLT in a future release. See [Removing XSLT for a more secure browser](https://developer.chrome.com/docs/web-platform/deprecating-xslt). As a result, you should treat reliance on client‑side XSLT as technical debt and plan migration accordingly. Microsoft Edge version 147 introduces the XSLTEnabled feature policy to support testing and transition scenarios while the Chromium project works toward deprecating and removing XSLT support. We encourage organizations to proactively test setting `XSLTEnabled = Disabled` to identify application dependencies and remediation requirements ahead of any future default changes or removal of the feature. |
+| Deprecate unload event | v152-v155 | Edge 152 will introduce the new `unload` Permission-Policy, to allow creating unload event listeners.  The default value is initially `allow`, but between Edge 152 and Edge 155, the default value will gradually be migrated to `deny`, such that unload handlers stop firing on pages, unless a page explicitly opts in to re-enable them.  To explicitly enable unload event handlers, use the `allow` value.  <br/>Edge 152: Unload handlers will stop firing by default for 60% of page loads, unless the site explicitly enables unload handlers via the `unload` Permission-Policy.  <br/>Edge 154: Increases to 80% of page loads.  <br/>Edge 155: Increases to 100% of page loads.  <br/>This change is happening in the Chromium project, on which Microsoft Edge is based.  See [Planned deprecation of the unload event](./release-notes/152.md#planned-deprecation-of-the-unload-event) in _Microsoft Edge 152 web platform release notes (Aug. 2026)_, and [Intent to Deprecate: Deprecate unload event](https://groups.google.com/a/chromium.org/g/blink-dev/c/dvusqw9-IhI/m/SBkm_u1RAQAJ). |
 | Remove inline XSLT for production of SVG | v147 | Support for using XSLT stylesheets to transform XML data into SVG files has been removed.  See [Remove inline XSLT for production of SVG](./release-notes/147.md#remove-inline-xslt-for-production-of-svg) in _Microsoft Edge 147 web platform release notes (Apr. 2026)_. |
 | JPEG or PNG embedded in BMP | v145 | Support for embedding JPEG or PNG image data in a Bitmap image format is nonstandard, and has been removed.  See [Remove support for Bitmap extension to embed JPEG or PNG](./release-notes/145.md#remove-support-for-bitmap-extension-to-embed-jpeg-or-png) in _Microsoft Edge 145 web platform release notes (Feb. 2026)_. |
 | Externally loaded entities in XML parsing | v144 | Synchronous fetching of external XML entities/DTDs, which are then used when parsing under specific circumstances, has been removed. See [Externally loaded entities in XML parsing](./release-notes/144.md#externally-loaded-entities-in-xml-parsing), in _Microsoft Edge 144 web platform release notes (Jan. 2025)_. |
diff --git a/microsoft-edge/webview2/release-notes/index.md b/microsoft-edge/webview2/release-notes/index.md
index 1cbf8eae3e..52ebe399f0 100644
--- a/microsoft-edge/webview2/release-notes/index.md
+++ b/microsoft-edge/webview2/release-notes/index.md
@@ -1811,7 +1811,7 @@ See also [Control whether WebView Script APIs are enabled for service workers](#
 <!-- ---------- -->
 ###### Local Network Access (LNA) in WebView2
 
-The Chromium browser engine has introduced Local Network Access (LNA).  LNA is a security feature that prevents web pages from making requests to private or local network resources, unless the webpage has explicit permission to access the private or local network resources.  Examples of such resources are `localhost`, `192.168.*`, or `10.*`.
+The Chromium browser engine has introduced Local Network Access (LNA).  LNA is a security feature that prevents webpages from making requests to private or local network resources, unless the webpage has explicit permission to access the private or local network resources.  Examples of such resources are `localhost`, `192.168.*`, or `10.*`.
 
 LNA is currently disabled by default for WebView2 apps, but you can enable LNA support via the `msWebViewAllowLocalNetworkAccessChecks` flag.  For WebView2 apps, no action is required at this time.  For information about the flag, see [Available WebView2 browser flags](../concepts/webview-features-flags.md#available-webview2-browser-flags) in _WebView2 browser flags_.