diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index e432ed7b3..152d3a8b8 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -27029,7 +27029,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/serviceworker.generated.d.ts b/baselines/serviceworker.generated.d.ts
index 496ec35af..9f54e1f52 100644
--- a/baselines/serviceworker.generated.d.ts
+++ b/baselines/serviceworker.generated.d.ts
@@ -6684,7 +6684,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/sharedworker.generated.d.ts b/baselines/sharedworker.generated.d.ts
index 9d9546f25..5e702038f 100644
--- a/baselines/sharedworker.generated.d.ts
+++ b/baselines/sharedworker.generated.d.ts
@@ -6329,7 +6329,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index b12587b54..efd671aac 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -27005,7 +27005,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.5/serviceworker.generated.d.ts b/baselines/ts5.5/serviceworker.generated.d.ts
index 7d1e43a20..836266a13 100644
--- a/baselines/ts5.5/serviceworker.generated.d.ts
+++ b/baselines/ts5.5/serviceworker.generated.d.ts
@@ -6681,7 +6681,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.5/sharedworker.generated.d.ts b/baselines/ts5.5/sharedworker.generated.d.ts
index fe33d3ccc..07fd1c4b6 100644
--- a/baselines/ts5.5/sharedworker.generated.d.ts
+++ b/baselines/ts5.5/sharedworker.generated.d.ts
@@ -6326,7 +6326,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.5/webworker.generated.d.ts b/baselines/ts5.5/webworker.generated.d.ts
index 0e2978686..bdf5b3222 100644
--- a/baselines/ts5.5/webworker.generated.d.ts
+++ b/baselines/ts5.5/webworker.generated.d.ts
@@ -7554,7 +7554,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.6/dom.generated.d.ts b/baselines/ts5.6/dom.generated.d.ts
index 3a44fa5ac..81325d772 100644
--- a/baselines/ts5.6/dom.generated.d.ts
+++ b/baselines/ts5.6/dom.generated.d.ts
@@ -27026,7 +27026,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.6/serviceworker.generated.d.ts b/baselines/ts5.6/serviceworker.generated.d.ts
index 7d1e43a20..836266a13 100644
--- a/baselines/ts5.6/serviceworker.generated.d.ts
+++ b/baselines/ts5.6/serviceworker.generated.d.ts
@@ -6681,7 +6681,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.6/sharedworker.generated.d.ts b/baselines/ts5.6/sharedworker.generated.d.ts
index fe33d3ccc..07fd1c4b6 100644
--- a/baselines/ts5.6/sharedworker.generated.d.ts
+++ b/baselines/ts5.6/sharedworker.generated.d.ts
@@ -6326,7 +6326,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.6/webworker.generated.d.ts b/baselines/ts5.6/webworker.generated.d.ts
index 0e2978686..bdf5b3222 100644
--- a/baselines/ts5.6/webworker.generated.d.ts
+++ b/baselines/ts5.6/webworker.generated.d.ts
@@ -7554,7 +7554,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.9/dom.generated.d.ts b/baselines/ts5.9/dom.generated.d.ts
index 5342e7314..acadda99e 100644
--- a/baselines/ts5.9/dom.generated.d.ts
+++ b/baselines/ts5.9/dom.generated.d.ts
@@ -27026,7 +27026,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.9/serviceworker.generated.d.ts b/baselines/ts5.9/serviceworker.generated.d.ts
index 737c7ad36..02dfc2ee5 100644
--- a/baselines/ts5.9/serviceworker.generated.d.ts
+++ b/baselines/ts5.9/serviceworker.generated.d.ts
@@ -6681,7 +6681,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.9/sharedworker.generated.d.ts b/baselines/ts5.9/sharedworker.generated.d.ts
index 148e10883..9c323b051 100644
--- a/baselines/ts5.9/sharedworker.generated.d.ts
+++ b/baselines/ts5.9/sharedworker.generated.d.ts
@@ -6326,7 +6326,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/ts5.9/webworker.generated.d.ts b/baselines/ts5.9/webworker.generated.d.ts
index b9efc09c0..e3f5cc983 100644
--- a/baselines/ts5.9/webworker.generated.d.ts
+++ b/baselines/ts5.9/webworker.generated.d.ts
@@ -7554,7 +7554,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index 3bfc845bd..057922d2a 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -7557,7 +7557,7 @@ interface PerformanceServerTiming {
      */
     readonly description: string;
     /**
-     * The **`duration`** read-only property returns a double that contains the server-specified metric duration, or the value 0.0.
+     * The **`duration`** read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0.
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/PerformanceServerTiming/duration)
      */
diff --git a/inputfiles/mdn.json b/inputfiles/mdn.json
index 3a8d5091a..6d5a62456 100644
--- a/inputfiles/mdn.json
+++ b/inputfiles/mdn.json
@@ -22167,7 +22167,7 @@
   {
     "mdn_url": "/en-US/docs/Web/API/PerformanceServerTiming/duration",
     "pageType": "web-api-instance-property",
-    "summary": "The duration read-only property returns a double that contains the server-specified metric duration, or the value 0.0."
+    "summary": "The duration read-only property returns a double that contains the server-specified metric duration (usually in milliseconds), or the value 0.0."
   },
   {
     "mdn_url": "/en-US/docs/Web/API/PerformanceServerTiming/name",