Microsoft Edge 149 web platform release notes (Jun. 2026)

microsoft-edge/toc.yml

@@ -30,6 +30,10 @@
           href: ./web-platform/release-notes/index.md
           displayName: what's new, announcements
 
+        - name: Microsoft Edge 149
+          href: ./web-platform/release-notes/149.md
+          displayName: Microsoft Edge 149 web platform release notes (Jun. 2026)  # page title
+
         - name: Microsoft Edge 148
           href: ./web-platform/release-notes/148.md
           displayName: Microsoft Edge 148 web platform release notes (May 2026)  # page title
@@ -66,13 +70,13 @@
           href: ./web-platform/release-notes/140.md
           displayName: Microsoft Edge 140 web platform release notes (Sep. 2025)  # page title
 
-        - name: Microsoft Edge 139
-          href: ./web-platform/release-notes/139.md
-          displayName: Microsoft Edge 139 web platform release notes (Aug. 2025)  # page title
-
         # keep 10 items above
         - name: Archive
           items:
+            - name: Microsoft Edge 139
+              href: ./web-platform/release-notes/139.md
+              displayName: Microsoft Edge 139 web platform release notes (Aug. 2025)  # page title
+
             - name: Microsoft Edge 138
               href: ./web-platform/release-notes/138.md
               displayName: Microsoft Edge 138 web platform release notes (Jun. 2025)  # page title

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

@@ -76,10 +76,7 @@ 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/index.md).
-<!-- todo: when exists, use instead:
 See [What's new in DevTools (Microsoft Edge 147)](../../devtools/whats-new/147.md).
--->
 
 
 <!-- ====================================================================== -->

microsoft-edge/web-platform/release-notes/148.md

@@ -36,7 +36,6 @@ To stay up-to-date and get the latest web platform features, download a preview
   * [Detect language and translate text](#detect-language-and-translate-text)
   * [Web Authentication Immediate UI mode](#web-authentication-immediate-ui-mode)
   * [WebGPU `linear_indexing` feature](#webgpu-linear_indexing-feature)
-  * [WebSocket disconnection on bfcache entry](#websocket-disconnection-on-bfcache-entry)
   * [Always negotiate data channels in WebRTC](#always-negotiate-data-channels-in-webrtc)
 * [Origin trials](#origin-trials)
   * [Writer API](#writer-api)
@@ -345,20 +344,6 @@ See also:
 * [WebGPU API](https://developer.mozilla.org/docs/Web/API/WebGPU_API) at MDN.
 
 
-<!-- ------------------------------ -->
-#### WebSocket disconnection on bfcache entry
-
-Open WebSocket connections are now closed when a page enters the back/forward cache (bfcache), instead of preventing the page from being cached.
-
-Previously, a page with an active WebSocket connection couldn't be stored in the bfcache.  With this change, more pages benefit from instant backward and forward navigation.
-
-Your page receives a `close` event on each affected `WebSocket` when the page enters the bfcache.  Listen for the `pageshow` event, and then reconnect when `event.persisted` is `true`.
-
-See also:
-* [WebSocket](https://developer.mozilla.org/docs/Web/API/WebSocket) at MDN.
-* [Working with the bfcache](https://developer.mozilla.org/docs/Web/API/WebSockets_API/Writing_WebSocket_client_applications#working_with_the_bfcache) at MDN.
-
-
 <!-- ------------------------------ -->
 #### Always negotiate data channels in WebRTC