writer pass

Author: mikehoffms

microsoft-edge/devtools-guide-chromium/whats-new/2025/03/devtools-134-images/theme-options.png

@@ -1,6 +1,6 @@
 ---
 title: What's New in DevTools (Microsoft Edge 134)
-description: "Move a tab left or right within the Elements or Sources tool. Screen reader improvements. And more."
+description: "Forced reflow in the Performance Insights sidebar. Heap snapshot statistics account for every byte. DevTools theme menu is simplified. And more."
 author: MSEdgeTeam
 ms.author: msedgedevrel
 ms.topic: conceptual
@@ -18,7 +18,7 @@ These are the latest features in the Stable release of Microsoft Edge DevTools.
 
 <!-- Subtitle: View the top function call and its total reflow time in your performance trace. -->
 
-The Performance Insights sidebar now includes a new section called Forced Reflow. This insight highlights the most time-consuming function call, showing its total reflow time and related stack traces. By clicking on this insight, you can see the function call and its stack trace highlighted in the Main frame.
+The **Performance Insights** sidebar includes a new section called **Forced Reflow**.  This insight highlights the most time-consuming function call, showing its total reflow time and related stack traces.  By clicking on this insight, you can see the function call and its stack trace highlighted in the **Main** frame:
 
 ![Forced reflow insight in the sidebar](./devtools-134-images/forced-reflow.png)
 
@@ -28,12 +28,14 @@ The Performance Insights sidebar now includes a new section called Forced Reflow
 
 <!-- Subtitle: View a memory allocation pie chart of your heap snapshot under Statistics-->
 
-When you take a heap snapshot in the Memory tool, the Statistics pie chart doesn't show every byte in the categories, resulting in blank parts of the chart. Two new catch-all categories have been added for the rest of the bytes in the heap snapshot: Other JS objects and Other non-JS objects(such as HTML and CSS).
+Previously, when you took a heap snapshot in the **Memory** tool, the **Statistics** pie chart didn't show every byte that's in the categories, resulting in blank parts of the chart:
 
-Before:
 ![Heap snapshot statistic view before](./devtools-134-images/heap-snapshot-statistics-before.png)
 
-After:
+To fix this, two new catch-all categories have been added, to account for the rest of the bytes in the heap snapshot:
+* **Other JS objects**
+* **Other non-JS objects (such as HTML and CSS)**
+
 ![Heap snapshot statistic view after](./devtools-134-images/heap-snapshot-statistics-after.png)
 
 
@@ -42,16 +44,34 @@ After:
 
 <!-- Subtitle: Change DevTools theme by clicking Customize and control DevTools > Themes. Choose from Light or Dark. -->
 
-The theme options have been simplified by removing the redundant nesting options. When you go to Customize and control DevTools > Themes, the options have been simplified to System preference, Light, Dark.
+The theme options have been simplified by removing the redundant nesting options.  When you go to **Customize and control DevTools** > **Themes**, the options have been simplified to **System preference**, **Light**, and **Dark**:
 
 ![DevTools theme options](./devtools-134-images/theme-options.png)
 
 
 <!-- ====================================================================== -->
 ## Announcements from the Chromium project
+<!-- https://developer.chrome.com/blog/new-in-devtools-134 -->
 
 Microsoft Edge 134 also includes the following updates from the Chromium project:
 
+* [Privacy and security panel](https://developer.chrome.com/blog/new-in-devtools-134#privacy-and-security)
+* [Performance panel improvements](https://developer.chrome.com/blog/new-in-devtools-134#perf)
+   * [Calibrated CPU throttling presets](https://developer.chrome.com/blog/new-in-devtools-134#calibrated-cpu-throttling)
+   * [Select different performance events in the same AI chat](https://developer.chrome.com/blog/new-in-devtools-134#perf-select)
+   * [First- and third-party highlighting in Performance](https://developer.chrome.com/blog/new-in-devtools-134#perf-third-party)
+   * [Field data in marker tooltips and insights](https://developer.chrome.com/blog/new-in-devtools-134#field-data)
+   * ['Forced reflow' insight](https://developer.chrome.com/blog/new-in-devtools-134#forced-reflow)
+   * ['Optimize DOM size' insight](https://developer.chrome.com/blog/new-in-devtools-134#dom-size)
+   * [Extend the performance trace with console.timeStamp](https://developer.chrome.com/blog/new-in-devtools-134#console-timestamp)
+* [Elements panel improvements](https://developer.chrome.com/blog/new-in-devtools-134#elements)
+   * [Real-time values of animated styles](https://developer.chrome.com/blog/new-in-devtools-134#real-time-animation)
+   * [Support for :open pseudo-class and various pseudo-elements](https://developer.chrome.com/blog/new-in-devtools-134#pseudo)
+* [Copy all console messages](https://developer.chrome.com/blog/new-in-devtools-134#copy-console)
+* [Byte units in the Memory panel](https://developer.chrome.com/blog/new-in-devtools-134#byte-units)
+* [Miscellaneous highlights](https://developer.chrome.com/blog/new-in-devtools-134#misc)
+<!-- todo: maybe remove some links -->
+
 
 <!-- ====================================================================== -->
 ## See also

microsoft-edge/devtools-guide-chromium/whats-new/2025/03/devtools-134.md

@@ -71,6 +71,10 @@
               href: ./devtools-guide-chromium/whats-new/whats-new.md
               displayName: release notes, announcements
 # latest 10 What's New
+            - name: Microsoft Edge 134
+              href: ./devtools-guide-chromium/whats-new/2025/03/devtools-134.md
+              displayName: What's New in DevTools (Microsoft Edge 134)  # page title
+
             - name: Microsoft Edge 133
               href: ./devtools-guide-chromium/whats-new/2025/02/devtools-133.md
               displayName: What's New in DevTools (Microsoft Edge 133)  # page title
@@ -107,16 +111,16 @@
               href: ./devtools-guide-chromium/whats-new/2024/05/devtools-125.md
               displayName: What's New in DevTools (Microsoft Edge 125)  # page title
 
-            - name: Microsoft Edge 124
-              href: ./devtools-guide-chromium/whats-new/2024/04/devtools-124.md
-              displayName: What's New in DevTools (Microsoft Edge 124)  # page title
-
             # keep 10 items above
             - name: Archive
               items:
                 - name: What's New in DevTools archive
                   href: ./devtools-guide-chromium/whats-new/whats-new-archive.md
 
+                - name: Microsoft Edge 124
+                  href: ./devtools-guide-chromium/whats-new/2024/04/devtools-124.md
+                  displayName: What's New in DevTools (Microsoft Edge 124)  # page title
+
                 - name: Microsoft Edge 123
                   href: ./devtools-guide-chromium/whats-new/2024/03/devtools-123.md
                   displayName: What's New in DevTools (Microsoft Edge 123)  # page title