Edge 138 web platform release notes (#3457)

* 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

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

---------

Co-authored-by: captainbrosset <captainbrosset@users.noreply.github.com>
Co-authored-by: Michael S. Hoffman <v-mihoffman@microsoft.com>

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 138
+          href: ./web-platform/release-notes/138.md
+          displayName: Microsoft Edge 137 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

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

@@ -38,7 +38,6 @@ To stay up-to-date and get the latest web platform features, download a preview
     * [Language support for `CanvasTextDrawingStyles`](#language-support-for-canvastextdrawingstyles)
     * [Permissions Policy reports for iframes](#permissions-policy-reports-for-iframes)
     * [Predictable reported storage quota](#predictable-reported-storage-quota)
-    * [Strict Same-origin policy for Storage Access API](#strict-same-origin-policy-for-storage-access-api)
     * [Use the `double` type for ProgressEvent's `loaded` and `total` attributes](#use-the-double-type-for-progressevents-loaded-and-total-attributes)
     * [`getCharNumAtPosition`, `isPointInFill`, and `isPointInStroke` now use `DOMPoint` objects](#getcharnumatposition-ispointinfill-and-ispointinstroke-now-use-dompoint-objects)
     * [Web Authentication Conditional Create](#web-authentication-conditional-create)
@@ -66,7 +65,7 @@ See [What's New in DevTools (Microsoft Edge 136)](../../devtools-guide-chromium/
 <!-- ====================================================================== -->
 ## WebView2
 
-For WebView2, see [1.0.3240.44](../../webview2/release-notes/index.md#10324044) in _Release Notes for the WebView2 SDK_ (May 2025).
+See [1.0.3240.44](../../webview2/release-notes/index.md#10324044) in _Release Notes for the WebView2 SDK_ (May 2025).
 
 
 <!-- ====================================================================== -->
@@ -271,16 +270,6 @@ Sites with unlimited storage permissions and enforced quotas are unaffected.
 See [Storage quotas and eviction criteria](https://developer.mozilla.org/docs/Web/API/Storage_API/Storage_quotas_and_eviction_criteria) 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 [Storage Access API](https://developer.mozilla.org/docs/Web/API/Storage_Access_API) at MDN.
-
-
 <!-- ---------- -->
 ###### Use the `double` type for ProgressEvent's `loaded` and `total` attributes
 

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

@@ -33,7 +33,6 @@ To stay up-to-date and get the latest web platform features, download a preview
     * [Blob URL partitioning](#blob-url-partitioning)
     * [Call stacks in crash reports from unresponsive web pages](#call-stacks-in-crash-reports-from-unresponsive-web-pages)
     * [Floating point color types in `<canvas>`](#floating-point-color-types-in-canvas)
-    * [Disallow plain text pre-rendering over HTTP](#disallow-plain-text-pre-rendering-over-http)
     * [Document isolation policies](#document-isolation-policies)
     * [Ed25519 signature algorithm support in Web Cryptography API](#ed25519-signature-algorithm-support-in-web-cryptography-api)
     * [JavaScript Promise Integration (JSPI) in WebAssembly](#javascript-promise-integration-jspi-in-webassembly)
@@ -294,16 +293,6 @@ This change enables high-precision applications, such as:
 See [Canvas Floating Point Color Values](https://github.com/w3c/ColorWeb-CG/blob/main/canvas_float.md).
 
 
-<!-- ---------- -->
-###### Disallow plain text pre-rendering over HTTP
-
-Previously, plain text pre-rendering was permitted over both HTTP and HTTPS connections.
-
-To make pre-rendering consistent with pre-fetch, plain text pre-rendering now only works over HTTPS.
-
-See [Navigation fetch changes](https://wicg.github.io/nav-speculation/prerendering.html#navigate-fetch-patch) in _Prerendering Revamped_.
-
-
 <!-- ---------- -->
 ###### Document isolation policies