---
description: Browser Run upgraded its default browser to Chrome 152 and improved Quick Actions reliability.
title: Browser Run now runs Chrome 152
image: https://developers.cloudflare.com/changelog/post/2026-10-30-chrome-152/og.png?v=d32a96949003a63b
---

[Skip to content](#main-content)

[View RSS feeds](https://developers.cloudflare.com/fundamentals/new-features/available-rss-feeds/) [ Subscribe to RSS](https://developers.cloudflare.com/changelog/rss/index.xml)

[Back to all posts](https://developers.cloudflare.com/changelog)

October 30, 2026

## Browser Run now runs Chrome 152

[Browser Run](https://developers.cloudflare.com/browser-run/)

Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/changelog/post/2026-10-30-chrome-152/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/)

[Browser Run](https://developers.cloudflare.com/browser-run/) now runs Chrome 152 by default. Your sessions get current web platform features, rendering fixes, and security patches. You do not need to change your code.

This release also includes the following improvements:

- **Updated default User-Agent.** The default User-Agent for [Quick Actions](https://developers.cloudflare.com/browser-run/quick-actions/) now reports Chrome 152 instead of Chrome 119. If you allowlist or match the Browser Run User-Agent, update your rules. You can still set your own value with the `userAgent` parameter. Refer to [Automatic request headers](https://developers.cloudflare.com/browser-run/reference/automatic-request-headers/#user-agent).
- **Better site compatibility.** Quick Actions requests now look more like requests from a regular Chrome browser, so fewer sites block them.
- **Large response headers.** Pages that return large response headers now load correctly.
- **Updated root certificates.** Browser Run removed distrusted root certificates from its trust store.
- **Absolute links.** [`/links`](https://developers.cloudflare.com/browser-run/quick-actions/links-endpoint/) now returns absolute URLs, and links-only [crawls](https://developers.cloudflare.com/browser-run/quick-actions/crawl-endpoint/) now follow relative links.
- **Better Markdown output.** [`/markdown`](https://developers.cloudflare.com/browser-run/quick-actions/markdown-endpoint/) and crawl Markdown output now keep code block languages.
- **Clearer errors.** Quick Actions that time out now return a consistent error. [Outbound Workers](https://developers.cloudflare.com/browser-run/features/outbound-workers/) that throw an exception now return an HTTP error to the browser.

For more information, refer to the [Browser Run documentation](https://developers.cloudflare.com/browser-run/).

```json
{"@context":"https://schema.org","@type":"BlogPosting","@id":"https://developers.cloudflare.com/changelog/post/2026-10-30-chrome-152/#page","headline":"Browser Run now runs Chrome 152","description":"Browser Run upgraded its default browser to Chrome 152 and improved Quick Actions reliability.","url":"https://developers.cloudflare.com/changelog/post/2026-10-30-chrome-152/","inLanguage":"en","image":"https://developers.cloudflare.com/changelog/post/2026-10-30-chrome-152/og.png?v=d32a96949003a63b","dateModified":"2026-10-30","datePublished":"2026-10-30","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}
```