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microsoft-edge/toc.yml

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href: ./web-platform/release-notes/index.md
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displayName: what's new, announcements
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- name: Microsoft Edge 135
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href: ./web-platform/release-notes/135.md
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displayName: Microsoft Edge 135 web platform release notes (Apr. 2025) # page title
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- name: Microsoft Edge 134
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href: ./web-platform/release-notes/134.md
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displayName: Microsoft Edge 134 web platform release notes (Mar. 2025) # page title

microsoft-edge/web-platform/release-notes/133.md

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<!-- ====================================================================== -->
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## Edge DevTools
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For Edge DevTools, see [What's New in DevTools (Microsoft Edge 133)](../../devtools-guide-chromium/whats-new/2025/02/devtools-133.md).
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See [What's New in DevTools (Microsoft Edge 133)](../../devtools-guide-chromium/whats-new/2025/02/devtools-133.md).
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<!-- ====================================================================== -->
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## WebView2
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For WebView2, see [Release Notes for the WebView2 SDK](../../webview2/release-notes/index.md).
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See [1.0.3065.39](../../webview2/release-notes/index.md#10306539) in _Release Notes for the WebView2 SDK_ (Feb. 2025).
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Expires on June 14, 2025.
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Granular per-document and per-element control over which content should allow or disallow handwriting input.
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The `handwriting` attribute provides a per-document and per-element way to control where handwriting input, such as when using a stylus, is allowed.
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* [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Handwriting/explainer.md)
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* [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=Handwriting,OriginTrialFeedback&amp;title=%5BHandwriting%5D+Feedback)

microsoft-edge/web-platform/release-notes/134.md

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* [Private Aggregation API: per-context contribution limits for Shared Storage callers](#private-aggregation-api-per-context-contribution-limits-for-shared-storage-callers)
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* [Support `imageSmoothingQuality` in CSS Painting API](#support-imagesmoothingquality-in-css-painting-api)
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* [WebGPU Subgroups](#webgpu-subgroups)
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* [`fetchLater()`](#fetchlater)
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* [Support Web Locks API in Shared Storage](#support-web-locks-api-in-shared-storage)
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* [Origin trials](#origin-trials)
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* [Microsoft Edge-only origin trials](#microsoft-edge-only-origin-trials)
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* [Digital Goods API](#digital-goods-api)
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* [Web App `LocalFolder` Access](#web-app-localfolder-access)
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* [HTML+IDL handwriting attribute](#htmlidl-handwriting-attribute)
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* [Acquisition Info API](#acquisition-info-api)
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* [New Chromium origin trials](#new-chromium-origin-trials)
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* [SelectParserRelaxation](#selectparserrelaxation)
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<!-- ====================================================================== -->
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## Edge DevTools
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For Edge DevTools, see [What's New in Microsoft Edge DevTools](../../devtools-guide-chromium/whats-new/whats-new.md).
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See [What's New in DevTools (Microsoft Edge 134)](../../devtools-guide-chromium/whats-new/2025/03/devtools-134.md).
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<!-- ====================================================================== -->
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## WebView2
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For WebView2, see [Release Notes for the WebView2 SDK](../../webview2/release-notes/index.md).
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See [1.0.3124.44](../../webview2/release-notes/index.md#10312444) in _Release Notes for the WebView2 SDK_ (March 2025).
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<!-- ====================================================================== -->
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###### Customizable `<select>` element
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The customizable `<select>` element allows developers to take complete control of the rendering of the element, by adding the `appearance: base-select` CSS declaration.
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The customizable `<select>` element allows you to take complete control of the rendering of the element, by adding the `appearance: base-select` CSS declaration.
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This feature currently relies on the `SelectParserRelaxation` flag, which changes the HTML parser to allow more tags within the `<select>` tag. Sites which include additional tags inside `<select>` which were getting removed before, such as `<span>` elements, or are including an extremely large number of `<option>` elements may be affected by `SelectParserRelaxation`.
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<!-- ---------- -->
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###### `application-title` meta tag for installed web apps
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The `<meta name="application-title">` element allows developers of installed web applications to set the text that appears in the title bar of the installed application window. By default, if the `application-title` meta name is missing, the text that's contained in the HTML `<title>` element is used instead.
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The `<meta name="application-title">` element allows an installed web application to set the text that appears in the title bar of the installed application window. By default, if the `application-title` meta name is missing, the text that's contained in the HTML `<title>` element is used instead.
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See [Other names](https://developer.mozilla.org/docs/Web/HTML/Element/meta/name#other_names), in _Standard metadata names_, at MDN.
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###### Explicit resource management
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This feature introduces the `using` keyword to JavaScript, which allows developers to explicitly manage resources. The `using` keyword is used to define a block of code that uses a resource, and ensures that the resource is disposed of when the block is exited. This feature addresses a common pattern in software development regarding the lifetime and management of various resources (such as memory or I/O). This pattern supports resource allocation and explicitly releasing critical resources.
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This feature introduces the `using` keyword to JavaScript, which allows you to explicitly manage resources. The `using` keyword is used to define a block of code that uses a resource, and ensures that the resource is disposed of when the block is exited. This feature addresses a common pattern in software development regarding the lifetime and management of various resources (such as memory or I/O). This pattern supports resource allocation and explicitly releasing critical resources.
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See [ECMAScript Explicit Resource Management](https://github.com/tc39/proposal-explicit-resource-management).
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See [WebGPU API](https://developer.mozilla.org/docs/Web/API/WebGPU_API) at MDN.
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###### `fetchLater()`
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The `fetchLater()` JavaScript method requests a deferred fetch. After this method is called, the network request is queued by the browser, and is then invoked either:
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* When the document is destroyed.
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* After a certain time.<!-- todo: after a specified duration? -->
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The method returns a `FetchLaterResult` that contains a boolean field. The value of the boolean field is updated when the deferred request has been sent. When the request is successfully sent, the response is ignored by browser, including its body and headers.
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See [Window: fetch() method](https://developer.mozilla.org/docs/Web/API/Window/fetch) at MDN.
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###### Support Web Locks API in Shared Storage
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Granular per-document and per-element control over which content should allow or disallow handwriting input.
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The `handwriting` attribute provides a per-document and per-element way to control where handwriting input, such as when using a stylus, is allowed.
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* [Explainer](https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Handwriting/explainer.md)
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* [Feedback](https://github.com/MicrosoftEdge/MSEdgeExplainers/issues/new?labels=Handwriting,OriginTrialFeedback&amp;title=%5BHandwriting%5D+Feedback)
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* [Register](https://developer.microsoft.com/microsoft-edge/origin-trials/trials/4013a45f-3f48-4341-81ea-1bc13bf90c83)
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<!-- ------------------------------ -->
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#### New Chromium origin trials
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###### SelectParserRelaxation
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Expires on November 11, 2025.
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This is a deprecation origin trial, which re-enables the old parser behavior for parsing `<select>` tags. Under that old behavior, non-supported content is silently discarded and not included in the DOM content underneath the `<select>`. This trial can be used in case the new behavior that's described in [Customizable `<select>` element](#customizable-select-element) (above) breaks a site.
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* [Explainer](https://chromestatus.com/feature/5145948356083712)
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* [Feedback](https://crbug.com/new)
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* [Register](https://developer.chrome.com/origintrials/#/register_trial/182958734861926401)
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<!-- ====================================================================== -->
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> [!NOTE]
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> 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).

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