diff --git a/docs/src/api/class-websocketroute.md b/docs/src/api/class-websocketroute.md
index 39ca75d5867b0..d2fd7cb2ebe17 100644
--- a/docs/src/api/class-websocketroute.md
+++ b/docs/src/api/class-websocketroute.md
@@ -26,7 +26,7 @@ page.routeWebSocket("/ws", ws -> {
 ```
 
 ```python async
-def message_handler(ws, message):
+def message_handler(ws: WebSocketRoute, message: Union[str, bytes]):
   if message == "request":
     ws.send("response")
 
@@ -36,7 +36,7 @@ await page.route_web_socket("/ws", lambda ws: ws.on_message(
 ```
 
 ```python sync
-def message_handler(ws, message):
+def message_handler(ws: WebSocketRoute, message: Union[str, bytes]):
   if message == "request":
     ws.send("response")
 
diff --git a/docs/src/release-notes-csharp.md b/docs/src/release-notes-csharp.md
index 994d047794bfe..fee7d732fec4b 100644
--- a/docs/src/release-notes-csharp.md
+++ b/docs/src/release-notes-csharp.md
@@ -4,6 +4,47 @@ title: "Release notes"
 toc_max_heading_level: 2
 ---
 
+
+## Version 1.48
+
+### WebSocket routing
+
+New methods [`method: Page.routeWebSocket`] and [`method: BrowserContext.routeWebSocket`] allow to intercept, modify and mock WebSocket connections initiated in the page. Below is a simple example that mocks WebSocket communication by responding to a `"request"` with a `"response"`.
+
+```csharp
+await page.RouteWebSocketAsync("/ws", ws => {
+  ws.OnMessage(message => {
+    if (message == "request")
+      ws.Send("response");
+  });
+});
+```
+
+See [WebSocketRoute] for more details.
+
+### UI updates
+
+- New "copy" buttons for annotations and test location in the HTML report.
+- Route method calls like [`method: Route.fulfill`] are not shown in the report and trace viewer anymore. You can see which network requests were routed in the network tab instead.
+- New "Copy as cURL" and "Copy as fetch" buttons for requests in the network tab.
+
+### Miscellaneous
+
+- New method [`method: Page.requestGC`] may help detect memory leaks.
+- Requests made by [APIRequestContext] now record detailed timing and security information in the HAR.
+
+### Browser Versions
+
+- Chromium 130.0.6723.19
+- Mozilla Firefox 130.0
+- WebKit 18.0
+
+This version was also tested against the following stable channels:
+
+- Google Chrome 129
+- Microsoft Edge 129
+
+
 ## Version 1.47
 
 ### Network Tab improvements
diff --git a/docs/src/release-notes-java.md b/docs/src/release-notes-java.md
index c50d5a67c4b67..ae9735861129c 100644
--- a/docs/src/release-notes-java.md
+++ b/docs/src/release-notes-java.md
@@ -4,6 +4,46 @@ title: "Release notes"
 toc_max_heading_level: 2
 ---
 
+## Version 1.48
+
+### WebSocket routing
+
+New methods [`method: Page.routeWebSocket`] and [`method: BrowserContext.routeWebSocket`] allow to intercept, modify and mock WebSocket connections initiated in the page. Below is a simple example that mocks WebSocket communication by responding to a `"request"` with a `"response"`.
+
+```java
+page.routeWebSocket("/ws", ws -> {
+  ws.onMessage(message -> {
+    if ("request".equals(message))
+      ws.send("response");
+  });
+});
+```
+
+See [WebSocketRoute] for more details.
+
+### UI updates
+
+- New "copy" buttons for annotations and test location in the HTML report.
+- Route method calls like [`method: Route.fulfill`] are not shown in the report and trace viewer anymore. You can see which network requests were routed in the network tab instead.
+- New "Copy as cURL" and "Copy as fetch" buttons for requests in the network tab.
+
+### Miscellaneous
+
+- New method [`method: Page.requestGC`] may help detect memory leaks.
+- Requests made by [APIRequestContext] now record detailed timing and security information in the HAR.
+
+### Browser Versions
+
+- Chromium 130.0.6723.19
+- Mozilla Firefox 130.0
+- WebKit 18.0
+
+This version was also tested against the following stable channels:
+
+- Google Chrome 129
+- Microsoft Edge 129
+
+
 ## Version 1.47
 
 ### Network Tab improvements
diff --git a/docs/src/release-notes-js.md b/docs/src/release-notes-js.md
index 4676a9dfb10fc..b366c43dbd189 100644
--- a/docs/src/release-notes-js.md
+++ b/docs/src/release-notes-js.md
@@ -6,6 +6,48 @@ toc_max_heading_level: 2
 
 import LiteYouTube from '@site/src/components/LiteYouTube';
 
+## Version 1.48
+
+### WebSocket routing
+
+New methods [`method: Page.routeWebSocket`] and [`method: BrowserContext.routeWebSocket`] allow to intercept, modify and mock WebSocket connections initiated in the page. Below is a simple example that mocks WebSocket communication by responding to a `"request"` with a `"response"`.
+
+```js
+await page.routeWebSocket('/ws', ws => {
+  ws.onMessage(message => {
+    if (message === 'request')
+      ws.send('response');
+  });
+});
+```
+
+See [WebSocketRoute] for more details.
+
+### UI updates
+
+- New "copy" buttons for annotations and test location in the HTML report.
+- Route method calls like [`method: Route.fulfill`] are not shown in the report and trace viewer anymore. You can see which network requests were routed in the network tab instead.
+- New "Copy as cURL" and "Copy as fetch" buttons for requests in the network tab.
+
+### Miscellaneous
+
+- Option [`option: APIRequestContext.fetch.form`] and similar ones now accept [FormData](https://developer.mozilla.org/en-US/docs/Web/API/FormData).
+- New method [`method: Page.requestGC`] may help detect memory leaks.
+- New option [`option: Test.step.location`] to pass custom step location.
+- Requests made by [APIRequestContext] now record detailed timing and security information in the HAR.
+
+### Browser Versions
+
+- Chromium 130.0.6723.19
+- Mozilla Firefox 130.0
+- WebKit 18.0
+
+This version was also tested against the following stable channels:
+
+- Google Chrome 129
+- Microsoft Edge 129
+
+
 ## Version 1.47
 
 ### Network Tab improvements
diff --git a/docs/src/release-notes-python.md b/docs/src/release-notes-python.md
index 033c2697505a1..211e0ad5c2af8 100644
--- a/docs/src/release-notes-python.md
+++ b/docs/src/release-notes-python.md
@@ -4,6 +4,47 @@ title: "Release notes"
 toc_max_heading_level: 2
 ---
 
+## Version 1.48
+
+### WebSocket routing
+
+New methods [`method: Page.routeWebSocket`] and [`method: BrowserContext.routeWebSocket`] allow to intercept, modify and mock WebSocket connections initiated in the page. Below is a simple example that mocks WebSocket communication by responding to a `"request"` with a `"response"`.
+
+```python
+def message_handler(ws: WebSocketRoute, message: Union[str, bytes]):
+  if message == "request":
+    ws.send("response")
+
+page.route_web_socket("/ws", lambda ws: ws.on_message(
+    lambda message: message_handler(ws, message)
+))
+```
+
+See [WebSocketRoute] for more details.
+
+### UI updates
+
+- New "copy" buttons for annotations and test location in the HTML report.
+- Route method calls like [`method: Route.fulfill`] are not shown in the report and trace viewer anymore. You can see which network requests were routed in the network tab instead.
+- New "Copy as cURL" and "Copy as fetch" buttons for requests in the network tab.
+
+### Miscellaneous
+
+- New method [`method: Page.requestGC`] may help detect memory leaks.
+- Requests made by [APIRequestContext] now record detailed timing and security information in the HAR.
+
+### Browser Versions
+
+- Chromium 130.0.6723.19
+- Mozilla Firefox 130.0
+- WebKit 18.0
+
+This version was also tested against the following stable channels:
+
+- Google Chrome 129
+- Microsoft Edge 129
+
+
 ## Version 1.47
 
 ### Network Tab improvements