Add release notes for throttleNetwork

release notes/v0.48.0.md

@@ -27,6 +27,21 @@ Allows users to throttle the CPU from chrome/chromium's perspective, which helps
 ...
 ```
 
+### Add support for browser module's `page.throttleNetwork` [browser#887](https://github.com/grafana/xk6-browser/issues/887)
+
+Allows users to throttle the characteristics of the network from chrome/chromium's perspective, which helps emulate poor network connections when testing the website's frontend. The argument passed in is of type `NetworkProfile` which is mandatory. You can either define your own network profiles or use the ones we have defined by importing `networkProfiles` from the `browser` module.
+
+```js
+import { browser, networkProfiles } from 'k6/experimental/browser';
+...
+  const context = browser.newContext();
+  const page = context.newPage();
+
+  try {
+    page.throttleNetwork(networkProfiles['Slow 3G']);
+...
+```
+
 ### Add `k6 new` subcommand [#3394](https://github.com/grafana/k6/pull/3394)
 
 `k6` now has a `new` subcommand that can be used to generate a new test script. This is useful for new users who want to get started quickly, or for experienced users who want to save time when creating new test scripts. The subcommand can be used like this: