From ce98739d27a1db060a03e1b1954c51daa7f586d5 Mon Sep 17 00:00:00 2001
From: Michael Hoffman <45407486+mikehoffms@users.noreply.github.com>
Date: Mon, 14 Sep 2026 08:48:27 -0700
Subject: [PATCH 1/7] template

---
 microsoft-edge/toc.yml                        |  5 +-
 .../web-platform/release-notes/154.md         |  2 +-
 .../webview2/release-notes/runtime/154.md     | 15 ++----
 .../webview2/release-notes/runtime/155.md     | 48 +++++++++++++++++++
 .../webview2/release-notes/runtime/index.md   |  3 +-
 .../release-notes/sdk/1-0-4255-prerelease.md  |  4 +-
 6 files changed, 60 insertions(+), 17 deletions(-)
 create mode 100644 microsoft-edge/webview2/release-notes/runtime/155.md

diff --git a/microsoft-edge/toc.yml b/microsoft-edge/toc.yml
index 3c8470ef7f..5c8a1785ec 100644
--- a/microsoft-edge/toc.yml
+++ b/microsoft-edge/toc.yml
@@ -1511,7 +1511,10 @@
                 - name: Release notes for the WebView2 Runtime
                   href: ./webview2/release-notes/runtime/index.md
 
-                - name: Preview Runtime 154.0.4258.9 (Sep. 10, 2026)
+                - name: Preview Runtime 155.0.nnnn.nn (Sep. nn, 2026)
+                  href: ./webview2/release-notes/runtime/155.md
+
+                - name: Runtime 154.0.nnnn.nn (Sep. nn, 2026)
                   href: ./webview2/release-notes/runtime/154.md
 
                 - name: Runtime 153.0.4234.32 (Sep. 11, 2026)
diff --git a/microsoft-edge/web-platform/release-notes/154.md b/microsoft-edge/web-platform/release-notes/154.md
index b215c37698..c1bcfd69dc 100644
--- a/microsoft-edge/web-platform/release-notes/154.md
+++ b/microsoft-edge/web-platform/release-notes/154.md
@@ -49,7 +49,7 @@ See [What's new in DevTools (Microsoft Edge 154)](../../devtools/whats-new/154.m
 ## WebView2
 
 See:
-* [Preview Runtime 154.0.4258.9 (Sep. 10, 2026)](../../webview2/release-notes/runtime/154.md)
+* [Runtime 154.0.nnnn.nn (Sep. nn, 2026)](../../webview2/release-notes/runtime/154.md)
 
 
 <!-- ====================================================================== -->
diff --git a/microsoft-edge/webview2/release-notes/runtime/154.md b/microsoft-edge/webview2/release-notes/runtime/154.md
index d586832a3b..90beb584ab 100644
--- a/microsoft-edge/webview2/release-notes/runtime/154.md
+++ b/microsoft-edge/webview2/release-notes/runtime/154.md
@@ -1,5 +1,5 @@
 ---
-title: Preview Runtime 154.0.4258.9 (Sep. 10, 2026)
+title: Runtime 154.0.nnnn.nn (Sep. nn, 2026)
 description: Release notes for Microsoft Edge WebView2 Preview Runtime 154.0.4258.9.
 author: MSEdgeTeam
 ms.author: msedgedevrel
@@ -8,7 +8,7 @@ ms.service: microsoft-edge
 ms.subservice: webview
 ms.date: 09/10/2026
 ---
-# Preview Runtime 154.0.4258.9 (Sep. 10, 2026)
+# Runtime 154.0.nnnn.nn (Sep. nn, 2026)
 
 <!-- todo: when this runtime gets released as a stable runtime, follow /release-notes/includes/runtime-template.md:
 remove "preview" from title
@@ -18,16 +18,7 @@ update lead-in sentence
 del See Also link [Prerelease testing using preview channels of Microsoft Edge]
 -->
 
-Release notes for Microsoft Edge WebView2 Preview Runtime, release date: Sep. 10, 2026.
-
-<!-- todo: remove paragraphs when this runtime gets released as a stable runtime -->
-This is a Preview Runtime, for early testing.  Prerelease testing of WebView2 SDKs uses a preview channel of Microsoft Edge (Beta, Dev, or Canary), which includes the WebView2 Preview Runtime.
-
-These release notes are for the WebView2 Preview Runtime, which corresponds to the Beta preview channel of Microsoft Edge.  We recommend testing your app using the Beta preview channel of Microsoft Edge, before these changes are promoted to Stable.  If you want to test even earlier, you can test against Edge Dev or Edge Canary.
-
-See [Prerelease testing using preview channels of Microsoft Edge](../../how-to/prerelease-testing.md).
-
-<!-- / end of remove paragraphs -->
+Release notes for Microsoft Edge WebView2 Runtime, release date: Sep. nn, 2026.
 
 In addition to the following WebView2 Runtime improvements, you can also use the new web platform features from Microsoft Edge 154; see [Microsoft Edge 154 web platform release notes (Sep. 2026)](../../../web-platform/release-notes/154.md).
 
diff --git a/microsoft-edge/webview2/release-notes/runtime/155.md b/microsoft-edge/webview2/release-notes/runtime/155.md
new file mode 100644
index 0000000000..7948f8af8d
--- /dev/null
+++ b/microsoft-edge/webview2/release-notes/runtime/155.md
@@ -0,0 +1,48 @@
+---
+title: Preview Runtime 155.n.nnnn.nn (Mmm. dd, yyyy)
+description: Release notes for Microsoft Edge WebView2 Preview Runtime nnn.n.nnnn.nn.
+author: MSEdgeTeam
+ms.author: msedgedevrel
+ms.topic: article
+ms.service: microsoft-edge
+ms.subservice: webview
+ms.date: 01/01/2026
+---
+# Preview Runtime 155.n.nnnn.nn (Mmm. dd, yyyy)
+<!-- todo: when this runtime gets released as a stable runtime, follow /release-notes/includes/runtime-template.md:
+remove "preview" from title
+update version number
+update date
+update lead-in sentence
+del See Also link [Prerelease testing using preview channels of Microsoft Edge]
+-->
+
+Release notes for Microsoft Edge WebView2 Preview Runtime, release date: Mmm. dd, yyyy.
+
+<!-- todo: remove paragraphs when this runtime gets released as a stable runtime -->
+This is a Preview Runtime, for early testing.  Prerelease testing of WebView2 SDKs uses a preview channel of Microsoft Edge (Beta, Dev, or Canary), which includes the WebView2 Preview Runtime.
+
+These release notes are for the WebView2 Preview Runtime, which corresponds to the Beta preview channel of Microsoft Edge.  We recommend testing your app using the Beta preview channel of Microsoft Edge, before these changes are promoted to Stable.  If you want to test even earlier, you can test against Edge Dev or Edge Canary.
+
+See [Prerelease testing using preview channels of Microsoft Edge](../../how-to/prerelease-testing.md).
+
+<!-- / end of remove paragraphs -->
+
+In addition to the following WebView2 Runtime improvements, you can also use the new web platform features from Microsoft Edge nnn; see [Microsoft Edge nnn web platform release notes (Mmm. yyyy)] (../../../web-platform/release-notes/nnn.md).
+
+
+<!-- ====================================================================== -->
+#### Bug fixes
+
+* Fixed behavior.  ([Issue #] ())
+
+
+<!-- ====================================================================== -->
+## See also
+
+* [SDK n.n.nnnn-prerelease, for Runtime nnn (Mmm. dd, yyyy)] (../sdk/n-n-nnnn-prerelease.md)
+* [Release notes for WebView2](../index.md)
+   * [Release notes for the WebView2 Runtime](./index.md)
+   * [Release notes for WebView2 SDKs](../sdk/index.md)
+* [Prerelease testing using preview channels of Microsoft Edge](../../how-to/prerelease-testing.md)
+* [Microsoft Edge nnn web platform release notes (Mmm. yyyy)] (../../../web-platform/release-notes/nnn.md)
diff --git a/microsoft-edge/webview2/release-notes/runtime/index.md b/microsoft-edge/webview2/release-notes/runtime/index.md
index edb6ac8cc0..27df3b8090 100644
--- a/microsoft-edge/webview2/release-notes/runtime/index.md
+++ b/microsoft-edge/webview2/release-notes/runtime/index.md
@@ -15,7 +15,8 @@ list past 10 releases (runtimes)
 in toc.yml, add new relnotes pages, move relnotes pages to archive
 in /webview2/release-notes/runtime/index.md, add new relnotes link, remove earliest relnotes link -->
 Release notes for recent Runtimes:
-* [Preview Runtime 154.0.4258.9 (Sep. 10, 2026)](./154.md)
+* [Preview Runtime 155.n.nnnn.nn (Mmm. dd, yyyy)](./155.md)
+* [Runtime 154.0.nnnn.nn (Sep. nn, 2026)](./154.md)
 * [Runtime 153.0.4234.32 (Sep. 11, 2026)](./153.md)
 * [Runtime 152.0.4191.53 (Aug. 28, 2026)](./152.md)
 * [Runtime 151.0.4129.50 (Aug. 3, 2026)](./151.md)
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md
index cbfec17e82..f67ca63084 100644
--- a/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md
+++ b/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md
@@ -14,7 +14,7 @@ Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Sep. 3,
 
 [NuGet package for WebView2 SDK 1.0.4255-prerelease](https://www.nuget.org/packages/Microsoft.Web.WebView2/1.0.4255-prerelease)
 
-For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 154.0.4255.0 or later; see [Preview Runtime 154.0.4258.9 (Sep. 10, 2026)](../runtime/154.md).
+For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 154.0.4255.0 or later; see [Runtime 154.0.nnnn.nn (Sep. nn, 2026)](../runtime/154.md).
 
 **Detailed contents:**
 * [Experimental APIs (Phase 1: Experimental in Prerelease)](#experimental-apis-phase-1-experimental-in-prerelease)
@@ -205,7 +205,7 @@ See the [Shared WebView2 Cluster Environment](https://github.com/MicrosoftEdge/W
 <!-- ====================================================================== -->
 ## See also
 
-* [Preview Runtime 154.0.4258.9 (Sep. 10, 2026)](../runtime/154.md)
+* [Runtime 154.0.nnnn.nn (Sep. nn, 2026)](../runtime/154.md)
 * [Release notes for WebView2](../index.md)
    * [Release notes for the WebView2 Runtime](../runtime/index.md)
    * [Release notes for WebView2 SDKs](./index.md)

From d21a3929ac628332bc44d9eee4cec6f098aae0de Mon Sep 17 00:00:00 2001
From: Michael Hoffman <45407486+mikehoffms@users.noreply.github.com>
Date: Mon, 14 Sep 2026 15:47:54 -0700
Subject: [PATCH 2/7] link Overview APIs

---
 microsoft-edge/toc.yml                        | 12 ++-
 .../webview2/release-notes/sdk/1-0-4022-49.md |  3 +
 .../webview2/release-notes/sdk/1-0-4999-nn.md | 72 ++++++++++++++
 .../release-notes/sdk/1-0-4999-prerelease.md  | 93 +++++++++++++++++++
 .../webview2/release-notes/sdk/index.md       |  2 +
 5 files changed, 179 insertions(+), 3 deletions(-)
 create mode 100644 microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md
 create mode 100644 microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md

diff --git a/microsoft-edge/toc.yml b/microsoft-edge/toc.yml
index 5c8a1785ec..2d4ff329f7 100644
--- a/microsoft-edge/toc.yml
+++ b/microsoft-edge/toc.yml
@@ -1544,11 +1544,11 @@
                 - name: Runtime 145.0.3800.47 (Feb. 16, 2026)
                   href: ./webview2/release-notes/runtime/145.md
 
-                - name: Runtime 144.0.3719.77 (Jan. 27, 2026)
-                  href: ./webview2/release-notes/runtime/144.md
-
                 - name: Archive
                   items:
+                    - name: Runtime 144.0.3719.77 (Jan. 27, 2026)
+                      href: ./webview2/release-notes/runtime/144.md
+
                     - name: Runtime 143.0.3650.58 (Dec. 8, 2025)
                       href: ./webview2/release-notes/runtime/143.md
 
@@ -1759,6 +1759,12 @@
                 - name: Release notes for WebView2 SDKs
                   href: ./webview2/release-notes/sdk/index.md
 
+                - name: SDK n.n.nnnn-prerelease, for Runtime 155 (Mmm. dd, yyyy)
+                  href: ./webview2/release-notes/sdk/1-0-4999-prerelease.md
+
+                - name: SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)
+                  href: ./webview2/release-notes/sdk/1-0-4999-nn.md
+
                 - name: SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)
                   href: ./webview2/release-notes/sdk/1-0-4255-prerelease.md
 
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4022-49.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4022-49.md
index 6e09aceed4..a512465d08 100644
--- a/microsoft-edge/webview2/release-notes/sdk/1-0-4022-49.md
+++ b/microsoft-edge/webview2/release-notes/sdk/1-0-4022-49.md
@@ -43,6 +43,9 @@ These APIs provide:
 
 Previous phase: [Enable background processing and offline support (WebView2 Worker APIs)](./1-0-4015-prerelease.md#enable-background-processing-and-offline-support-webview2-worker-apis) in _SDK 1.0.4015-prerelease, for Runtime 149 (May 11, 2026)_.
 
+See also:
+* [Enable background processing and offline support (WebView2 Worker APIs)](../../concepts/overview-features-apis.md?#enable-background-processing-and-offline-support-webview2-worker-apis) in _Overview of WebView2 APIs_.
+
 ##### [.NET/C#](#tab/dotnetcsharp)
 
 <!-- 1 -->
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md
new file mode 100644
index 0000000000..ba8434f537
--- /dev/null
+++ b/microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md
@@ -0,0 +1,72 @@
+---
+title: SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)
+description: Release notes for Microsoft Edge WebView2, for Release SDK n.n.nnnn.nn.
+author: MSEdgeTeam
+ms.author: msedgedevrel
+ms.topic: article
+ms.service: microsoft-edge
+ms.subservice: webview
+ms.date: 01/01/2026
+---
+# SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)
+
+Release notes for Microsoft Edge WebView2 SDK, release date: Mmm. dd, yyyy.
+
+[NuGet package for WebView2 SDK n.n.nnnn.nn] (`https://www.nuget.org/packages/Microsoft.Web.WebView2/n.n.nnnn.nn`)
+
+For full API compatibility, this Release version of the WebView2 SDK requires WebView2 [Runtime nnn.n.nnnn.nn (Mmm. dd, yyyy)] (../runtime/nnn.md) or later.
+
+<!-- if a section is empty, omit the section heading -->
+
+
+<!-- ====================================================================== -->
+## Breaking changes
+
+
+<!-- ------------------------------ -->
+#### heading
+
+
+<!-- ====================================================================== -->
+## General changes
+
+
+<!-- ------------------------------ -->
+#### heading
+
+
+<!-- ====================================================================== -->
+## Promotions to Phase 3 (Stable in Release)
+
+The following APIs have been promoted from Phase 2: Stable in Prerelease, to Phase 3: Stable in Release, and are now included in this Release SDK.
+
+
+<!-- ------------------------------ -->
+#### heading
+
+description
+
+Previous phase: [~] (./~.md#~) in _~_.
+
+##### [.NET/C#](#tab/dotnetcsharp)
+
+##### [WinRT/C#](#tab/winrtcsharp)
+
+##### [Win32/C++](#tab/win32cpp)
+
+---
+
+
+<!-- ====================================================================== -->
+## Bug fixes
+
+* Fixed behavior.  ([Issue #] ())
+
+
+<!-- ====================================================================== -->
+## See also
+
+* [Runtime nnn.n.nnnn.nn (Mmm. dd, yyyy)] (../runtime/nnn.md)
+* [Release notes for WebView2](../index.md)
+   * [Release notes for the WebView2 Runtime](../runtime/index.md)
+   * [Release notes for WebView2 SDKs](./index.md)
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md
new file mode 100644
index 0000000000..6f3d14f7d5
--- /dev/null
+++ b/microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md
@@ -0,0 +1,93 @@
+---
+title: SDK n.n.nnnn-prerelease, for Runtime 155 (Mmm. dd, yyyy)
+description: Release notes for Microsoft Edge WebView2 SDK n.n.nnnn-prerelease.
+author: MSEdgeTeam
+ms.author: msedgedevrel
+ms.topic: article
+ms.service: microsoft-edge
+ms.subservice: webview
+ms.date: 01/01/2026
+---
+# SDK n.n.nnnn-prerelease, for Runtime 155 (Mmm. dd, yyyy)
+
+Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Mmm. dd, yyyy.
+
+[NuGet package for WebView2 SDK n.n.nnnn-prerelease] (`https://www.nuget.org/packages/Microsoft.Web.WebView2/n.n.nnnn-prerelease`)
+
+For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version nnn.n.nnnn.n or later; see [Runtime nnn.n.nnnn.nn (Mmm. dd, yyyy)] (../runtime/nnn.md).
+
+<!-- if a section is empty, omit the section heading -->
+
+
+<!-- ====================================================================== -->
+## Breaking changes
+
+
+<!-- ------------------------------ -->
+#### heading
+
+
+<!-- ====================================================================== -->
+## General changes
+
+
+<!-- ------------------------------ -->
+#### heading
+
+
+<!-- ====================================================================== -->
+## Experimental APIs (Phase 1: Experimental in Prerelease)
+
+The following APIs are in Phase 1: Experimental in Prerelease, and have been added in this Prerelease SDK.
+
+
+<!-- ------------------------------ -->
+#### heading
+
+description
+
+##### [.NET/C#](#tab/dotnetcsharp)
+
+##### [WinRT/C#](#tab/winrtcsharp)
+
+##### [Win32/C++](#tab/win32cpp)
+
+---
+
+
+<!-- ====================================================================== -->
+## Promotions to Phase 2 (Stable in Prerelease)
+
+The following APIs have been promoted from Phase 1: Experimental in Prerelease, to Phase 2: Stable in Prerelease, and are included in this Prerelease SDK.
+The following APIs skipped Phase 1: Experimental in Prerelease, and have been directly added to Phase 2: Stable in Prerelease, and are included in this Prerelease SDK.
+
+
+<!-- ------------------------------ -->
+#### heading
+
+description
+
+Previous phase: [~] (./~.md#~) in _~_.
+
+##### [.NET/C#](#tab/dotnetcsharp)
+
+##### [WinRT/C#](#tab/winrtcsharp)
+
+##### [Win32/C++](#tab/win32cpp)
+
+---
+
+
+<!-- ====================================================================== -->
+## Bug fixes
+
+* Fixed behavior.  ([Issue #] ())
+
+
+<!-- ====================================================================== -->
+## See also
+
+* [Runtime nnn.n.nnnn.nn (Mmm. dd, yyyy)] (../runtime/nnn.md)
+* [Release notes for WebView2](../index.md)
+   * [Release notes for the WebView2 Runtime](../runtime/index.md)
+   * [Release notes for WebView2 SDKs](./index.md)
diff --git a/microsoft-edge/webview2/release-notes/sdk/index.md b/microsoft-edge/webview2/release-notes/sdk/index.md
index d06d1c294b..8ccf049c7c 100644
--- a/microsoft-edge/webview2/release-notes/sdk/index.md
+++ b/microsoft-edge/webview2/release-notes/sdk/index.md
@@ -15,6 +15,8 @@ list past 10 releases
 in toc.yml, add new relnotes pages, move relnotes pages to archive
 in /webview2/release-notes/sdk/index.md, add new relnotes links, remove earliest relnotes links -->
 Release notes for recent SDKs:
+* [SDK n.n.nnnn-prerelease, for Runtime 155 (Mmm. dd, yyyy)](./1-0-4999-prerelease.md)
+* [SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)](./1-0-4999-nn.md)
 * [SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)](./1-0-4255-prerelease.md)
 * [SDK 1.0.4191.47, for Runtime 152 (Aug. 28, 2026)](./1-0-4191-47.md)
 * [SDK 1.0.4181-prerelease, for Runtime 152 (Aug. 3, 2026)](./1-0-4181-prerelease.md)

From 732c59902cf0bdd2fe5b70bbcc36b6f2c79c1447 Mon Sep 17 00:00:00 2001
From: Michael Hoffman <45407486+mikehoffms@users.noreply.github.com>
Date: Fri, 25 Sep 2026 08:32:53 -0700
Subject: [PATCH 3/7] apply script output

---
 microsoft-edge/toc.yml                        |  4 ++--
 .../webview2/release-notes/runtime/155.md     | 19 ++++++++++---------
 .../webview2/release-notes/runtime/index.md   |  2 +-
 .../release-notes/sdk/1-0-4999-prerelease.md  | 18 ++++++++++--------
 .../webview2/release-notes/sdk/index.md       |  2 +-
 5 files changed, 24 insertions(+), 21 deletions(-)

diff --git a/microsoft-edge/toc.yml b/microsoft-edge/toc.yml
index 015f45c940..b20bad3268 100644
--- a/microsoft-edge/toc.yml
+++ b/microsoft-edge/toc.yml
@@ -1519,7 +1519,7 @@
                 - name: Release notes for the WebView2 Runtime
                   href: ./webview2/release-notes/runtime/index.md
 
-                - name: Preview Runtime 155.0.nnnn.nn (Sep. nn, 2026)
+                - name: Preview Runtime 155.0.4283.13 (Sep. 24, 2026)
                   href: ./webview2/release-notes/runtime/155.md
 
                 - name: Runtime 154.0.nnnn.nn (Sep. nn, 2026)
@@ -1767,7 +1767,7 @@
                 - name: Release notes for WebView2 SDKs
                   href: ./webview2/release-notes/sdk/index.md
 
-                - name: SDK n.n.nnnn-prerelease, for Runtime 155 (Mmm. dd, yyyy)
+                - name: SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)
                   href: ./webview2/release-notes/sdk/1-0-4999-prerelease.md
 
                 - name: SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)
diff --git a/microsoft-edge/webview2/release-notes/runtime/155.md b/microsoft-edge/webview2/release-notes/runtime/155.md
index 7948f8af8d..0e5cb04b9e 100644
--- a/microsoft-edge/webview2/release-notes/runtime/155.md
+++ b/microsoft-edge/webview2/release-notes/runtime/155.md
@@ -1,14 +1,14 @@
 ---
-title: Preview Runtime 155.n.nnnn.nn (Mmm. dd, yyyy)
-description: Release notes for Microsoft Edge WebView2 Preview Runtime nnn.n.nnnn.nn.
+title: Preview Runtime 155.0.4283.13 (Sep. 24, 2026)
+description: Release notes for Microsoft Edge WebView2 Preview Runtime 155.0.4283.13.
 author: MSEdgeTeam
 ms.author: msedgedevrel
 ms.topic: article
 ms.service: microsoft-edge
 ms.subservice: webview
-ms.date: 01/01/2026
+ms.date: 09/24/2026
 ---
-# Preview Runtime 155.n.nnnn.nn (Mmm. dd, yyyy)
+# Preview Runtime 155.0.4283.13 (Sep. 24, 2026)
 <!-- todo: when this runtime gets released as a stable runtime, follow /release-notes/includes/runtime-template.md:
 remove "preview" from title
 update version number
@@ -17,7 +17,7 @@ update lead-in sentence
 del See Also link [Prerelease testing using preview channels of Microsoft Edge]
 -->
 
-Release notes for Microsoft Edge WebView2 Preview Runtime, release date: Mmm. dd, yyyy.
+Release notes for Microsoft Edge WebView2 Preview Runtime, release date: Sep. 24, 2026.
 
 <!-- todo: remove paragraphs when this runtime gets released as a stable runtime -->
 This is a Preview Runtime, for early testing.  Prerelease testing of WebView2 SDKs uses a preview channel of Microsoft Edge (Beta, Dev, or Canary), which includes the WebView2 Preview Runtime.
@@ -28,21 +28,22 @@ See [Prerelease testing using preview channels of Microsoft Edge](../../how-to/p
 
 <!-- / end of remove paragraphs -->
 
-In addition to the following WebView2 Runtime improvements, you can also use the new web platform features from Microsoft Edge nnn; see [Microsoft Edge nnn web platform release notes (Mmm. yyyy)] (../../../web-platform/release-notes/nnn.md).
+In addition to the following WebView2 Runtime improvements, you can also use the new web platform features from Microsoft Edge nnn; see [Microsoft Edge 155 web platform release notes (Oct. 8, 2026)](../../../web-platform/release-notes/155.md).
 
 
 <!-- ====================================================================== -->
 #### Bug fixes
 
-* Fixed behavior.  ([Issue #] ())
+* Fixed incorrect viewport in minimal mode.
+* Fixed JAWS support in minimal window.
 
 
 <!-- ====================================================================== -->
 ## See also
 
-* [SDK n.n.nnnn-prerelease, for Runtime nnn (Mmm. dd, yyyy)] (../sdk/n-n-nnnn-prerelease.md)
+* [SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)](./1-0-4999-prerelease.md)
 * [Release notes for WebView2](../index.md)
    * [Release notes for the WebView2 Runtime](./index.md)
    * [Release notes for WebView2 SDKs](../sdk/index.md)
 * [Prerelease testing using preview channels of Microsoft Edge](../../how-to/prerelease-testing.md)
-* [Microsoft Edge nnn web platform release notes (Mmm. yyyy)] (../../../web-platform/release-notes/nnn.md)
+* [Microsoft Edge 155 web platform release notes (Oct. 8, 2026)](../../../web-platform/release-notes/155.md)
diff --git a/microsoft-edge/webview2/release-notes/runtime/index.md b/microsoft-edge/webview2/release-notes/runtime/index.md
index 27df3b8090..51a3dd5213 100644
--- a/microsoft-edge/webview2/release-notes/runtime/index.md
+++ b/microsoft-edge/webview2/release-notes/runtime/index.md
@@ -15,7 +15,7 @@ list past 10 releases (runtimes)
 in toc.yml, add new relnotes pages, move relnotes pages to archive
 in /webview2/release-notes/runtime/index.md, add new relnotes link, remove earliest relnotes link -->
 Release notes for recent Runtimes:
-* [Preview Runtime 155.n.nnnn.nn (Mmm. dd, yyyy)](./155.md)
+* [Preview Runtime 155.0.4283.13 (Sep. 24, 2026)](./155.md)
 * [Runtime 154.0.nnnn.nn (Sep. nn, 2026)](./154.md)
 * [Runtime 153.0.4234.32 (Sep. 11, 2026)](./153.md)
 * [Runtime 152.0.4191.53 (Aug. 28, 2026)](./152.md)
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md
index 6f3d14f7d5..e82140aa33 100644
--- a/microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md
+++ b/microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md
@@ -1,20 +1,22 @@
 ---
-title: SDK n.n.nnnn-prerelease, for Runtime 155 (Mmm. dd, yyyy)
-description: Release notes for Microsoft Edge WebView2 SDK n.n.nnnn-prerelease.
+title: SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)
+description: Release notes for Microsoft Edge WebView2 SDK 1.0.4283-prerelease.
 author: MSEdgeTeam
 ms.author: msedgedevrel
 ms.topic: article
 ms.service: microsoft-edge
 ms.subservice: webview
-ms.date: 01/01/2026
+ms.date: 09/24/2026
 ---
-# SDK n.n.nnnn-prerelease, for Runtime 155 (Mmm. dd, yyyy)
+# SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)
 
-Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Mmm. dd, yyyy.
+_todo: expect to delete this placeholder page_
 
-[NuGet package for WebView2 SDK n.n.nnnn-prerelease] (`https://www.nuget.org/packages/Microsoft.Web.WebView2/n.n.nnnn-prerelease`)
+Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Sep. 24, 2026.
 
-For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version nnn.n.nnnn.n or later; see [Runtime nnn.n.nnnn.nn (Mmm. dd, yyyy)] (../runtime/nnn.md).
+[NuGet package for WebView2 SDK 1.0.4283-prerelease](https://www.nuget.org/packages/Microsoft.Web.WebView2/1.0.4283-prerelease)
+
+For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 155.0.4283.0<!-- todo: update last # --> or later; see [Preview Runtime 155.0.4283.13 (Sep. 24, 2026)](../runtime/155.md).
 
 <!-- if a section is empty, omit the section heading -->
 
@@ -87,7 +89,7 @@ Previous phase: [~] (./~.md#~) in _~_.
 <!-- ====================================================================== -->
 ## See also
 
-* [Runtime nnn.n.nnnn.nn (Mmm. dd, yyyy)] (../runtime/nnn.md)
+* [Preview Runtime 155.0.4283.13 (Sep. 24, 2026)](../runtime/155.md)
 * [Release notes for WebView2](../index.md)
    * [Release notes for the WebView2 Runtime](../runtime/index.md)
    * [Release notes for WebView2 SDKs](./index.md)
diff --git a/microsoft-edge/webview2/release-notes/sdk/index.md b/microsoft-edge/webview2/release-notes/sdk/index.md
index 8ccf049c7c..bba93db6a6 100644
--- a/microsoft-edge/webview2/release-notes/sdk/index.md
+++ b/microsoft-edge/webview2/release-notes/sdk/index.md
@@ -15,7 +15,7 @@ list past 10 releases
 in toc.yml, add new relnotes pages, move relnotes pages to archive
 in /webview2/release-notes/sdk/index.md, add new relnotes links, remove earliest relnotes links -->
 Release notes for recent SDKs:
-* [SDK n.n.nnnn-prerelease, for Runtime 155 (Mmm. dd, yyyy)](./1-0-4999-prerelease.md)
+* [SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)](./1-0-4999-prerelease.md)
 * [SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)](./1-0-4999-nn.md)
 * [SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)](./1-0-4255-prerelease.md)
 * [SDK 1.0.4191.47, for Runtime 152 (Aug. 28, 2026)](./1-0-4191-47.md)

From 0042460336aedf1a9d84d911355a2db003ac0099 Mon Sep 17 00:00:00 2001
From: Michael Hoffman <45407486+mikehoffms@users.noreply.github.com>
Date: Fri, 25 Sep 2026 08:39:47 -0700
Subject: [PATCH 4/7] real filename

---
 microsoft-edge/toc.yml                                        | 2 +-
 microsoft-edge/webview2/release-notes/runtime/155.md          | 2 +-
 microsoft-edge/webview2/release-notes/runtime/index.md        | 2 +-
 .../sdk/{1-0-4999-prerelease.md => 1-0-4283-prerelease.md}    | 0
 microsoft-edge/webview2/release-notes/sdk/index.md            | 4 ++--
 5 files changed, 5 insertions(+), 5 deletions(-)
 rename microsoft-edge/webview2/release-notes/sdk/{1-0-4999-prerelease.md => 1-0-4283-prerelease.md} (100%)

diff --git a/microsoft-edge/toc.yml b/microsoft-edge/toc.yml
index b20bad3268..2e85f67c33 100644
--- a/microsoft-edge/toc.yml
+++ b/microsoft-edge/toc.yml
@@ -1768,7 +1768,7 @@
                   href: ./webview2/release-notes/sdk/index.md
 
                 - name: SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)
-                  href: ./webview2/release-notes/sdk/1-0-4999-prerelease.md
+                  href: ./webview2/release-notes/sdk/1-0-4283-prerelease.md
 
                 - name: SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)
                   href: ./webview2/release-notes/sdk/1-0-4999-nn.md
diff --git a/microsoft-edge/webview2/release-notes/runtime/155.md b/microsoft-edge/webview2/release-notes/runtime/155.md
index 0e5cb04b9e..386331c00e 100644
--- a/microsoft-edge/webview2/release-notes/runtime/155.md
+++ b/microsoft-edge/webview2/release-notes/runtime/155.md
@@ -41,7 +41,7 @@ In addition to the following WebView2 Runtime improvements, you can also use the
 <!-- ====================================================================== -->
 ## See also
 
-* [SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)](./1-0-4999-prerelease.md)
+* [SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)](../sdk/1-0-4283-prerelease.md)
 * [Release notes for WebView2](../index.md)
    * [Release notes for the WebView2 Runtime](./index.md)
    * [Release notes for WebView2 SDKs](../sdk/index.md)
diff --git a/microsoft-edge/webview2/release-notes/runtime/index.md b/microsoft-edge/webview2/release-notes/runtime/index.md
index 51a3dd5213..e9f9a154f7 100644
--- a/microsoft-edge/webview2/release-notes/runtime/index.md
+++ b/microsoft-edge/webview2/release-notes/runtime/index.md
@@ -6,7 +6,7 @@ ms.author: msedgedevrel
 ms.topic: article
 ms.service: microsoft-edge
 ms.subservice: webview
-ms.date: 09/11/2026
+ms.date: 09/24/2026
 ---
 # Release notes for the WebView2 Runtime
 
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4283-prerelease.md
similarity index 100%
rename from microsoft-edge/webview2/release-notes/sdk/1-0-4999-prerelease.md
rename to microsoft-edge/webview2/release-notes/sdk/1-0-4283-prerelease.md
diff --git a/microsoft-edge/webview2/release-notes/sdk/index.md b/microsoft-edge/webview2/release-notes/sdk/index.md
index bba93db6a6..85fafb2401 100644
--- a/microsoft-edge/webview2/release-notes/sdk/index.md
+++ b/microsoft-edge/webview2/release-notes/sdk/index.md
@@ -6,7 +6,7 @@ ms.author: msedgedevrel
 ms.topic: article
 ms.service: microsoft-edge
 ms.subservice: webview
-ms.date: 09/11/2026
+ms.date: 09/24/2026
 ---
 # Release notes for WebView2 SDKs
 
@@ -15,7 +15,7 @@ list past 10 releases
 in toc.yml, add new relnotes pages, move relnotes pages to archive
 in /webview2/release-notes/sdk/index.md, add new relnotes links, remove earliest relnotes links -->
 Release notes for recent SDKs:
-* [SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)](./1-0-4999-prerelease.md)
+* [SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)](./1-0-4283-prerelease.md)
 * [SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)](./1-0-4999-nn.md)
 * [SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)](./1-0-4255-prerelease.md)
 * [SDK 1.0.4191.47, for Runtime 152 (Aug. 28, 2026)](./1-0-4191-47.md)

From a96c1ef46a6fa9a3b48e2f01211b70d483216919 Mon Sep 17 00:00:00 2001
From: Michael Hoffman <45407486+mikehoffms@users.noreply.github.com>
Date: Mon, 28 Sep 2026 11:26:37 -0700
Subject: [PATCH 5/7] inc script output StaRuntime 154, relSDK 154

---
 microsoft-edge/toc.yml                        | 39 ++++----
 .../web-platform/release-notes/153.md         |  1 -
 .../web-platform/release-notes/154.md         |  2 +-
 .../web-platform/release-notes/155.md         |  8 +-
 .../webview2/release-notes/runtime/153.md     |  4 +-
 .../webview2/release-notes/runtime/154.md     | 24 ++---
 .../webview2/release-notes/runtime/155.md     |  1 -
 .../webview2/release-notes/runtime/index.md   |  8 +-
 .../release-notes/sdk/1-0-4255-prerelease.md  |  6 +-
 .../webview2/release-notes/sdk/1-0-4258-31.md | 26 +++++
 .../release-notes/sdk/1-0-4283-prerelease.md  | 95 -------------------
 .../webview2/release-notes/sdk/1-0-4999-nn.md | 72 --------------
 .../webview2/release-notes/sdk/index.md       | 11 +--
 13 files changed, 66 insertions(+), 231 deletions(-)
 create mode 100644 microsoft-edge/webview2/release-notes/sdk/1-0-4258-31.md
 delete mode 100644 microsoft-edge/webview2/release-notes/sdk/1-0-4283-prerelease.md
 delete mode 100644 microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md

diff --git a/microsoft-edge/toc.yml b/microsoft-edge/toc.yml
index 2e85f67c33..5c68df3c22 100644
--- a/microsoft-edge/toc.yml
+++ b/microsoft-edge/toc.yml
@@ -1511,7 +1511,7 @@
               href: ./webview2/release-notes/index.md
 
               # maint:
-              # list past 10 releases (runtimes)
+              # list past 10 releases eg 155-146
               # in toc.yml, add new relnotes pages, move relnotes pages to archive
               # in /webview2/release-notes/runtime/index.md, add new relnotes link, remove earliest relnotes link
             - name: Runtime release notes
@@ -1522,7 +1522,7 @@
                 - name: Preview Runtime 155.0.4283.13 (Sep. 24, 2026)
                   href: ./webview2/release-notes/runtime/155.md
 
-                - name: Runtime 154.0.nnnn.nn (Sep. nn, 2026)
+                - name: Runtime 154.0.4258.37 (Sep. 28, 2026)
                   href: ./webview2/release-notes/runtime/154.md
 
                 - name: Runtime 153.0.4234.32 (Sep. 11, 2026)
@@ -1549,11 +1549,11 @@
                 - name: Runtime 146.0.3856.49 (Mar. 16, 2026)
                   href: ./webview2/release-notes/runtime/146.md
 
-                - name: Runtime 145.0.3800.47 (Feb. 16, 2026)
-                  href: ./webview2/release-notes/runtime/145.md
-
                 - name: Archive
                   items:
+                    - name: Runtime 145.0.3800.47 (Feb. 16, 2026)
+                      href: ./webview2/release-notes/runtime/145.md
+
                     - name: Runtime 144.0.3719.77 (Jan. 27, 2026)
                       href: ./webview2/release-notes/runtime/144.md
 
@@ -1758,7 +1758,7 @@
                       href: ./webview2/release-notes/runtime/76.md
 
               # maint:
-              # list past 10 releases
+              # list past 10 potential releases eg 154-145
               # in toc.yml, add new relnotes pages, move relnotes pages to archive
               # in /webview2/release-notes/sdk/index.md, add new relnotes links, remove earliest relnotes links
               # same order as https://www.nuget.org/packages/Microsoft.Web.WebView2 > Load more
@@ -1767,11 +1767,8 @@
                 - name: Release notes for WebView2 SDKs
                   href: ./webview2/release-notes/sdk/index.md
 
-                - name: SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)
-                  href: ./webview2/release-notes/sdk/1-0-4283-prerelease.md
-
-                - name: SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)
-                  href: ./webview2/release-notes/sdk/1-0-4999-nn.md
+                - name: SDK 1.0.4258.31, for Runtime 154 (Sep. 28, 2026)
+                  href: ./webview2/release-notes/sdk/1-0-4258-31.md
 
                 - name: SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)
                   href: ./webview2/release-notes/sdk/1-0-4255-prerelease.md
@@ -1817,18 +1814,18 @@
                 - name: SDK 1.0.3796-prerelease, for Runtime 145 (Jan. 19, 2026)
                   href: ./webview2/release-notes/sdk/1-0-3796-prerelease.md
 
-                - name: SDK 1.0.3719.77, for Runtime 144 (Jan. 27, 2026)
-                  href: ./webview2/release-notes/sdk/1-0-3719-77.md
-                - name: SDK 1.0.3712-prerelease, for Runtime 144 (Dec. 8, 2025)
-                  href: ./webview2/release-notes/sdk/1-0-3712-prerelease.md
-
-                - name: SDK 1.0.3650.58, for Runtime 143 (Dec. 8, 2025)
-                  href: ./webview2/release-notes/sdk/1-0-3650-58.md
-                - name: SDK 1.0.3650-prerelease, for Runtime 143 (Nov. 7, 2025)
-                  href: ./webview2/release-notes/sdk/1-0-3650-prerelease.md
-
                 - name: Archive  # keep Runtime nnn pair together when moving to archive
                   items:
+                    - name: SDK 1.0.3719.77, for Runtime 144 (Jan. 27, 2026)
+                      href: ./webview2/release-notes/sdk/1-0-3719-77.md
+                    - name: SDK 1.0.3712-prerelease, for Runtime 144 (Dec. 8, 2025)
+                      href: ./webview2/release-notes/sdk/1-0-3712-prerelease.md
+
+                    - name: SDK 1.0.3650.58, for Runtime 143 (Dec. 8, 2025)
+                      href: ./webview2/release-notes/sdk/1-0-3650-58.md
+                    - name: SDK 1.0.3650-prerelease, for Runtime 143 (Nov. 7, 2025)
+                      href: ./webview2/release-notes/sdk/1-0-3650-prerelease.md
+
                     - name: Release SDK 1.0.3595.46, for Runtime 142 (Nov. 3, 2025)
                       href: ./webview2/release-notes/sdk/1-0-3595-46.md
                     - name: Prerelease SDK 1.0.3590-prerelease, for Runtime 142 (Oct. 7, 2025)
diff --git a/microsoft-edge/web-platform/release-notes/153.md b/microsoft-edge/web-platform/release-notes/153.md
index a0f646b9f2..db94c31e40 100644
--- a/microsoft-edge/web-platform/release-notes/153.md
+++ b/microsoft-edge/web-platform/release-notes/153.md
@@ -44,7 +44,6 @@ See [What's new in DevTools (Microsoft Edge 153)](../../devtools/whats-new/153.m
 
 See:
 * [Runtime 153.0.4234.32 (Sep. 11, 2026)](../../webview2/release-notes/runtime/153.md)
-<!-- * [Release SDK n.n.nnnn.nn, for Runtime 153 (Mmm. dd, yyyy)](../../webview2/release-notes/sdk/n-n-nnnn-nn.md) -->
 
 
 <!-- ====================================================================== -->
diff --git a/microsoft-edge/web-platform/release-notes/154.md b/microsoft-edge/web-platform/release-notes/154.md
index 585b2f5836..f4d1671f9c 100644
--- a/microsoft-edge/web-platform/release-notes/154.md
+++ b/microsoft-edge/web-platform/release-notes/154.md
@@ -47,7 +47,7 @@ See [What's new in DevTools (Microsoft Edge 154)](../../devtools/whats-new/154.m
 ## WebView2
 
 See:
-* [Runtime 154.0.nnnn.nn (Sep. nn, 2026)](../../webview2/release-notes/runtime/154.md)
+* [Runtime 154.0.4258.37 (Sep. 28, 2026)](../../webview2/release-notes/runtime/154.md)
 
 
 <!-- ====================================================================== -->
diff --git a/microsoft-edge/web-platform/release-notes/155.md b/microsoft-edge/web-platform/release-notes/155.md
index 878d378697..7db70d4a90 100644
--- a/microsoft-edge/web-platform/release-notes/155.md
+++ b/microsoft-edge/web-platform/release-notes/155.md
@@ -45,12 +45,10 @@ See [What's new in DevTools (Microsoft Edge 155)](../../devtools/whats-new/155.m
 <!-- ====================================================================== -->
 ## WebView2
 
-See [Release notes for WebView2](../../webview2/release-notes/index.md).
-<!-- todo: when exists, use instead:
 See:
-* [Runtime nnn.n.nnnn.nn (Mmm. dd, yyyy)](../../webview2/release-notes/runtime/nnn.md)
-* [Release SDK n.n.nnnn.nn, for Runtime nnn (Mmm. dd, yyyy)](../../webview2/release-notes/sdk/n-n-nnnn-nn.md)
--->
+* [Preview Runtime 155.0.4283.13 (Sep. 24, 2026)](../../webview2/release-notes/runtime/155.md)
+<!-- todo: uncomment if/when Release SDK 155 page exists:
+* [Release SDK n.n.nnnn.nn, for Runtime 155 (Mmm. dd, yyyy)](../../webview2/release-notes/sdk/n-n-nnnn-nn.md) -->
 
 
 <!-- ====================================================================== -->
diff --git a/microsoft-edge/webview2/release-notes/runtime/153.md b/microsoft-edge/webview2/release-notes/runtime/153.md
index 82ebfd93b8..54ab4a786f 100644
--- a/microsoft-edge/webview2/release-notes/runtime/153.md
+++ b/microsoft-edge/webview2/release-notes/runtime/153.md
@@ -1,6 +1,6 @@
 ---
 title: Runtime 153.0.4234.32 (Sep. 11, 2026)
-description: Release notes for Microsoft Edge WebView2 Runtime nnn.n.nnnn.nn.
+description: Release notes for Microsoft Edge WebView2 Runtime 153.0.4234.32.
 author: MSEdgeTeam
 ms.author: msedgedevrel
 ms.topic: article
@@ -32,8 +32,6 @@ In addition to the following WebView2 Runtime improvements, you can also use the
 <!-- ====================================================================== -->
 ## See also
  
-<!-- * [SDK 1.0.4234.32, for Runtime 153 (Sep. 11, 2026)](../sdk/1-0-4234-32.md) -->
-<!-- * [SDK n.n.nnnn-prerelease, for Runtime 153 (Mmm. dd, yyyy)] (../sdk/n-n-nnnn-prerelease.md) -->
 * [Release notes for WebView2](../index.md)
    * [Release notes for the WebView2 Runtime](./index.md)
    * [Release notes for WebView2 SDKs](../sdk/index.md)
diff --git a/microsoft-edge/webview2/release-notes/runtime/154.md b/microsoft-edge/webview2/release-notes/runtime/154.md
index 9c66b32106..a85b7ba4b1 100644
--- a/microsoft-edge/webview2/release-notes/runtime/154.md
+++ b/microsoft-edge/webview2/release-notes/runtime/154.md
@@ -1,24 +1,16 @@
 ---
-title: Runtime 154.0.nnnn.nn (Sep. nn, 2026)
-description: Release notes for Microsoft Edge WebView2 Preview Runtime 154.0.4258.9.
+title: Runtime 154.0.4258.37 (Sep. 28, 2026)
+description: Release notes for Microsoft Edge WebView2 Runtime 154.0.4258.37.
 author: MSEdgeTeam
 ms.author: msedgedevrel
 ms.topic: article
 ms.service: microsoft-edge
 ms.subservice: webview
-ms.date: 09/10/2026
+ms.date: 09/28/2026
 ---
-# Runtime 154.0.nnnn.nn (Sep. nn, 2026)
+# Runtime 154.0.4258.37 (Sep. 28, 2026)
 
-<!-- todo: when this runtime gets released as a stable runtime, follow /release-notes/includes/runtime-template.md:
-remove "preview" from title
-update version number
-update date
-update lead-in sentence
-del See Also link [Prerelease testing using preview channels of Microsoft Edge]
--->
-
-Release notes for Microsoft Edge WebView2 Runtime, release date: Sep. nn, 2026.
+Release notes for Microsoft Edge WebView2 Runtime, release date: Sep. 28, 2026.
 
 In addition to the following WebView2 Runtime improvements, you can also use the new web platform features from Microsoft Edge 154; see [Microsoft Edge 154 web platform release notes (Sep. 24, 2026)](../../../web-platform/release-notes/154.md).
 
@@ -27,16 +19,16 @@ In addition to the following WebView2 Runtime improvements, you can also use the
 #### Bug fixes
 
 * Fixed downloads to be submitted for antivirus scanning under the host app's identity instead of the shared runtime's.
-
 * Fixed Mark-of-the-Web prompt state so it is tracked per host app instead of per shared WebView2 runtime.
-
 * Fixed the click propagation from the Window Controls Overlay (WCO) titlebar to webcontents<!-- todo: clarify webcontents -->.
+* Fixed incorrect viewport in minimal mode.
+* Fixed JAWS support in minimal window.
 
 
 <!-- ====================================================================== -->
 ## See also
 
-* [SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)](../sdk/1-0-4255-prerelease.md)
+* [SDK 1.0.4258.31, for Runtime 154 (Sep. 28, 2026)](./1-0-4258-31.md)
 * [Release notes for WebView2](../index.md)
    * [Release notes for the WebView2 Runtime](./index.md)
    * [Release notes for WebView2 SDKs](../sdk/index.md)
diff --git a/microsoft-edge/webview2/release-notes/runtime/155.md b/microsoft-edge/webview2/release-notes/runtime/155.md
index 386331c00e..9d68708d0f 100644
--- a/microsoft-edge/webview2/release-notes/runtime/155.md
+++ b/microsoft-edge/webview2/release-notes/runtime/155.md
@@ -41,7 +41,6 @@ In addition to the following WebView2 Runtime improvements, you can also use the
 <!-- ====================================================================== -->
 ## See also
 
-* [SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)](../sdk/1-0-4283-prerelease.md)
 * [Release notes for WebView2](../index.md)
    * [Release notes for the WebView2 Runtime](./index.md)
    * [Release notes for WebView2 SDKs](../sdk/index.md)
diff --git a/microsoft-edge/webview2/release-notes/runtime/index.md b/microsoft-edge/webview2/release-notes/runtime/index.md
index e9f9a154f7..2e8f3e12ce 100644
--- a/microsoft-edge/webview2/release-notes/runtime/index.md
+++ b/microsoft-edge/webview2/release-notes/runtime/index.md
@@ -6,17 +6,17 @@ ms.author: msedgedevrel
 ms.topic: article
 ms.service: microsoft-edge
 ms.subservice: webview
-ms.date: 09/24/2026
+ms.date: 09/28/2026
 ---
 # Release notes for the WebView2 Runtime
 
 <!-- maint:
-list past 10 releases (runtimes)
+list past 10 releases eg 155-146
 in toc.yml, add new relnotes pages, move relnotes pages to archive
 in /webview2/release-notes/runtime/index.md, add new relnotes link, remove earliest relnotes link -->
 Release notes for recent Runtimes:
 * [Preview Runtime 155.0.4283.13 (Sep. 24, 2026)](./155.md)
-* [Runtime 154.0.nnnn.nn (Sep. nn, 2026)](./154.md)
+* [Runtime 154.0.4258.37 (Sep. 28, 2026)](./154.md)
 * [Runtime 153.0.4234.32 (Sep. 11, 2026)](./153.md)
 * [Runtime 152.0.4191.53 (Aug. 28, 2026)](./152.md)
 * [Runtime 151.0.4129.50 (Aug. 3, 2026)](./151.md)
@@ -25,8 +25,6 @@ Release notes for recent Runtimes:
 * [Runtime 148.0.3967.48 (May 11, 2026)](./148.md)
 * [Runtime 147.0.3912.50 (Apr. 13, 2026)](./147.md)
 * [Runtime 146.0.3856.49 (Mar. 16, 2026)](./146.md)
-* [Runtime 145.0.3800.47 (Feb. 16, 2026)](./145.md)
-* [Runtime 144.0.3719.77 (Jan. 27, 2026)](./144.md)
 
 For earlier release notes, see **Archive** in the table of contents.
 
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md
index f67ca63084..54448e8128 100644
--- a/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md
+++ b/microsoft-edge/webview2/release-notes/sdk/1-0-4255-prerelease.md
@@ -10,11 +10,11 @@ ms.date: 09/11/2026
 ---
 # SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)
 
-Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Sep. 3, 2026.
+Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Sep. 11, 2026.
 
 [NuGet package for WebView2 SDK 1.0.4255-prerelease](https://www.nuget.org/packages/Microsoft.Web.WebView2/1.0.4255-prerelease)
 
-For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 154.0.4255.0 or later; see [Runtime 154.0.nnnn.nn (Sep. nn, 2026)](../runtime/154.md).
+For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 154.0.4255.0 or later; see [Runtime 154.0.4258.37 (Sep. 28, 2026)](../runtime/154.md).
 
 **Detailed contents:**
 * [Experimental APIs (Phase 1: Experimental in Prerelease)](#experimental-apis-phase-1-experimental-in-prerelease)
@@ -205,7 +205,7 @@ See the [Shared WebView2 Cluster Environment](https://github.com/MicrosoftEdge/W
 <!-- ====================================================================== -->
 ## See also
 
-* [Runtime 154.0.nnnn.nn (Sep. nn, 2026)](../runtime/154.md)
+* [Runtime 154.0.4258.37 (Sep. 28, 2026)](../runtime/154.md)
 * [Release notes for WebView2](../index.md)
    * [Release notes for the WebView2 Runtime](../runtime/index.md)
    * [Release notes for WebView2 SDKs](./index.md)
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4258-31.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4258-31.md
new file mode 100644
index 0000000000..42a4f4a5bc
--- /dev/null
+++ b/microsoft-edge/webview2/release-notes/sdk/1-0-4258-31.md
@@ -0,0 +1,26 @@
+---
+title: SDK 1.0.4258.31, for Runtime 154 (Sep. 28, 2026)
+description: Release notes for Microsoft Edge WebView2, for Release SDK 1.0.4258.31.
+author: MSEdgeTeam
+ms.author: msedgedevrel
+ms.topic: article
+ms.service: microsoft-edge
+ms.subservice: webview
+ms.date: 09/28/2026
+---
+# SDK 1.0.4258.31, for Runtime 154 (Sep. 28, 2026)
+
+Release notes for Microsoft Edge WebView2 SDK, release date: Sep. 28, 2026.
+
+[NuGet package for WebView2 SDK 1.0.4258.31](https://www.nuget.org/packages/Microsoft.Web.WebView2/1.0.4258.31)
+
+For full API compatibility, this Release version of the WebView2 SDK requires WebView2 [Runtime 154.0.4258.37 (Sep. 28, 2026)](../runtime/154.md) or later.
+
+
+<!-- ====================================================================== -->
+## See also
+
+* [Runtime 154.0.4258.37 (Sep. 28, 2026)](../runtime/154.md)
+* [Release notes for WebView2](../index.md)
+   * [Release notes for the WebView2 Runtime](../runtime/index.md)
+   * [Release notes for WebView2 SDKs](./index.md)
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4283-prerelease.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4283-prerelease.md
deleted file mode 100644
index e82140aa33..0000000000
--- a/microsoft-edge/webview2/release-notes/sdk/1-0-4283-prerelease.md
+++ /dev/null
@@ -1,95 +0,0 @@
----
-title: SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)
-description: Release notes for Microsoft Edge WebView2 SDK 1.0.4283-prerelease.
-author: MSEdgeTeam
-ms.author: msedgedevrel
-ms.topic: article
-ms.service: microsoft-edge
-ms.subservice: webview
-ms.date: 09/24/2026
----
-# SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)
-
-_todo: expect to delete this placeholder page_
-
-Release notes for Microsoft Edge WebView2 Prerelease SDK, release date: Sep. 24, 2026.
-
-[NuGet package for WebView2 SDK 1.0.4283-prerelease](https://www.nuget.org/packages/Microsoft.Web.WebView2/1.0.4283-prerelease)
-
-For full API compatibility, this Prerelease version of the WebView2 SDK requires the WebView2 Runtime that ships with Microsoft Edge version 155.0.4283.0<!-- todo: update last # --> or later; see [Preview Runtime 155.0.4283.13 (Sep. 24, 2026)](../runtime/155.md).
-
-<!-- if a section is empty, omit the section heading -->
-
-
-<!-- ====================================================================== -->
-## Breaking changes
-
-
-<!-- ------------------------------ -->
-#### heading
-
-
-<!-- ====================================================================== -->
-## General changes
-
-
-<!-- ------------------------------ -->
-#### heading
-
-
-<!-- ====================================================================== -->
-## Experimental APIs (Phase 1: Experimental in Prerelease)
-
-The following APIs are in Phase 1: Experimental in Prerelease, and have been added in this Prerelease SDK.
-
-
-<!-- ------------------------------ -->
-#### heading
-
-description
-
-##### [.NET/C#](#tab/dotnetcsharp)
-
-##### [WinRT/C#](#tab/winrtcsharp)
-
-##### [Win32/C++](#tab/win32cpp)
-
----
-
-
-<!-- ====================================================================== -->
-## Promotions to Phase 2 (Stable in Prerelease)
-
-The following APIs have been promoted from Phase 1: Experimental in Prerelease, to Phase 2: Stable in Prerelease, and are included in this Prerelease SDK.
-The following APIs skipped Phase 1: Experimental in Prerelease, and have been directly added to Phase 2: Stable in Prerelease, and are included in this Prerelease SDK.
-
-
-<!-- ------------------------------ -->
-#### heading
-
-description
-
-Previous phase: [~] (./~.md#~) in _~_.
-
-##### [.NET/C#](#tab/dotnetcsharp)
-
-##### [WinRT/C#](#tab/winrtcsharp)
-
-##### [Win32/C++](#tab/win32cpp)
-
----
-
-
-<!-- ====================================================================== -->
-## Bug fixes
-
-* Fixed behavior.  ([Issue #] ())
-
-
-<!-- ====================================================================== -->
-## See also
-
-* [Preview Runtime 155.0.4283.13 (Sep. 24, 2026)](../runtime/155.md)
-* [Release notes for WebView2](../index.md)
-   * [Release notes for the WebView2 Runtime](../runtime/index.md)
-   * [Release notes for WebView2 SDKs](./index.md)
diff --git a/microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md b/microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md
deleted file mode 100644
index ba8434f537..0000000000
--- a/microsoft-edge/webview2/release-notes/sdk/1-0-4999-nn.md
+++ /dev/null
@@ -1,72 +0,0 @@
----
-title: SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)
-description: Release notes for Microsoft Edge WebView2, for Release SDK n.n.nnnn.nn.
-author: MSEdgeTeam
-ms.author: msedgedevrel
-ms.topic: article
-ms.service: microsoft-edge
-ms.subservice: webview
-ms.date: 01/01/2026
----
-# SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)
-
-Release notes for Microsoft Edge WebView2 SDK, release date: Mmm. dd, yyyy.
-
-[NuGet package for WebView2 SDK n.n.nnnn.nn] (`https://www.nuget.org/packages/Microsoft.Web.WebView2/n.n.nnnn.nn`)
-
-For full API compatibility, this Release version of the WebView2 SDK requires WebView2 [Runtime nnn.n.nnnn.nn (Mmm. dd, yyyy)] (../runtime/nnn.md) or later.
-
-<!-- if a section is empty, omit the section heading -->
-
-
-<!-- ====================================================================== -->
-## Breaking changes
-
-
-<!-- ------------------------------ -->
-#### heading
-
-
-<!-- ====================================================================== -->
-## General changes
-
-
-<!-- ------------------------------ -->
-#### heading
-
-
-<!-- ====================================================================== -->
-## Promotions to Phase 3 (Stable in Release)
-
-The following APIs have been promoted from Phase 2: Stable in Prerelease, to Phase 3: Stable in Release, and are now included in this Release SDK.
-
-
-<!-- ------------------------------ -->
-#### heading
-
-description
-
-Previous phase: [~] (./~.md#~) in _~_.
-
-##### [.NET/C#](#tab/dotnetcsharp)
-
-##### [WinRT/C#](#tab/winrtcsharp)
-
-##### [Win32/C++](#tab/win32cpp)
-
----
-
-
-<!-- ====================================================================== -->
-## Bug fixes
-
-* Fixed behavior.  ([Issue #] ())
-
-
-<!-- ====================================================================== -->
-## See also
-
-* [Runtime nnn.n.nnnn.nn (Mmm. dd, yyyy)] (../runtime/nnn.md)
-* [Release notes for WebView2](../index.md)
-   * [Release notes for the WebView2 Runtime](../runtime/index.md)
-   * [Release notes for WebView2 SDKs](./index.md)
diff --git a/microsoft-edge/webview2/release-notes/sdk/index.md b/microsoft-edge/webview2/release-notes/sdk/index.md
index 85fafb2401..8aa33e294a 100644
--- a/microsoft-edge/webview2/release-notes/sdk/index.md
+++ b/microsoft-edge/webview2/release-notes/sdk/index.md
@@ -6,17 +6,16 @@ ms.author: msedgedevrel
 ms.topic: article
 ms.service: microsoft-edge
 ms.subservice: webview
-ms.date: 09/24/2026
+ms.date: 09/28/2026
 ---
 # Release notes for WebView2 SDKs
 
 <!-- maint:
-list past 10 releases
+list past 10 potential releases eg 154-145
 in toc.yml, add new relnotes pages, move relnotes pages to archive
 in /webview2/release-notes/sdk/index.md, add new relnotes links, remove earliest relnotes links -->
 Release notes for recent SDKs:
-* [SDK 1.0.4283-prerelease, for Runtime 155 (Sep. 24, 2026)](./1-0-4283-prerelease.md)
-* [SDK n.n.nnnn.nn, for Runtime 154 (Mmm. dd, yyyy)](./1-0-4999-nn.md)
+* [SDK 1.0.4258.31, for Runtime 154 (Sep. 28, 2026)](./1-0-4258-31.md)
 * [SDK 1.0.4255-prerelease, for Runtime 154 (Sep. 11, 2026)](./1-0-4255-prerelease.md)
 * [SDK 1.0.4191.47, for Runtime 152 (Aug. 28, 2026)](./1-0-4191-47.md)
 * [SDK 1.0.4181-prerelease, for Runtime 152 (Aug. 3, 2026)](./1-0-4181-prerelease.md)
@@ -34,10 +33,6 @@ Release notes for recent SDKs:
 * [SDK 1.0.3848-prerelease, for Runtime 146 (Feb. 16, 2026)](./1-0-3848-prerelease.md)
 * [SDK 1.0.3800.47, for Runtime 145 (Feb. 16, 2026)](./1-0-3800-47.md)
 * [SDK 1.0.3796-prerelease, for Runtime 145 (Jan. 19, 2026)](./1-0-3796-prerelease.md)
-* [SDK 1.0.3719.77, for Runtime 144 (Jan. 27, 2026)](./1-0-3719-77.md)
-* [SDK 1.0.3712-prerelease, for Runtime 144 (Dec. 8, 2025)](./1-0-3712-prerelease.md)
-* [SDK 1.0.3650.58, for Runtime 143 (Dec. 8, 2025)](./1-0-3650-58.md)
-* [SDK 1.0.3650-prerelease, for Runtime 143 (Nov. 7, 2025)](./1-0-3650-prerelease.md)
 
 For earlier release notes, see **Archive** in the table of contents.
 

From 9e7f137b04b5f83b164604ae27d4be863b6ce89c Mon Sep 17 00:00:00 2001
From: Michael Hoffman <45407486+mikehoffms@users.noreply.github.com>
Date: Mon, 28 Sep 2026 11:32:53 -0700
Subject: [PATCH 6/7] linkfix

---
 microsoft-edge/webview2/release-notes/runtime/154.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/microsoft-edge/webview2/release-notes/runtime/154.md b/microsoft-edge/webview2/release-notes/runtime/154.md
index a85b7ba4b1..4db456fb4d 100644
--- a/microsoft-edge/webview2/release-notes/runtime/154.md
+++ b/microsoft-edge/webview2/release-notes/runtime/154.md
@@ -28,7 +28,7 @@ In addition to the following WebView2 Runtime improvements, you can also use the
 <!-- ====================================================================== -->
 ## See also
 
-* [SDK 1.0.4258.31, for Runtime 154 (Sep. 28, 2026)](./1-0-4258-31.md)
+* [SDK 1.0.4258.31, for Runtime 154 (Sep. 28, 2026)](../sdk/1-0-4258-31.md)
 * [Release notes for WebView2](../index.md)
    * [Release notes for the WebView2 Runtime](./index.md)
    * [Release notes for WebView2 SDKs](../sdk/index.md)

From ca299baa5294b262ae21e0907e3d62db1bc6cec5 Mon Sep 17 00:00:00 2001
From: Michael Hoffman <45407486+mikehoffms@users.noreply.github.com>
Date: Mon, 28 Sep 2026 13:43:13 -0700
Subject: [PATCH 7/7] 1-line link

---
 microsoft-edge/web-platform/release-notes/155.md | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/microsoft-edge/web-platform/release-notes/155.md b/microsoft-edge/web-platform/release-notes/155.md
index 7db70d4a90..dab140da05 100644
--- a/microsoft-edge/web-platform/release-notes/155.md
+++ b/microsoft-edge/web-platform/release-notes/155.md
@@ -45,8 +45,7 @@ See [What's new in DevTools (Microsoft Edge 155)](../../devtools/whats-new/155.m
 <!-- ====================================================================== -->
 ## WebView2
 
-See:
-* [Preview Runtime 155.0.4283.13 (Sep. 24, 2026)](../../webview2/release-notes/runtime/155.md)
+See [Preview Runtime 155.0.4283.13 (Sep. 24, 2026)](../../webview2/release-notes/runtime/155.md).
 <!-- todo: uncomment if/when Release SDK 155 page exists:
 * [Release SDK n.n.nnnn.nn, for Runtime 155 (Mmm. dd, yyyy)](../../webview2/release-notes/sdk/n-n-nnnn-nn.md) -->