FeatureAug 20, 2026

Run more headless browsers concurrently with Browser Run

Browser RunCloudflare · Developer platform

Browser Run lets you automate headless browsers on Cloudflare's global network. Run full browser sessions for interactive workflows, or use Quick Actions for one-request tasks such as screenshots, PDFs, and capturing page content.

If you are on the Workers Paid plan, your default limits are now higher:

Limit · Previous · New

Concurrent browsers · 120 · 200

New browser instances / second · 1 · 3

Quick Actions requests / second · 10 · 30

You can now run hundreds of browser sessions in parallel, launch new browsers faster, and process three times as many Quick Actions per second. These published limits are defaults, not maximums. If your workload needs more more concurrent browsers, request higher limits.

Read the original announcement

All Browser Run updates →

Connect multiple clients to one Browser Run session
Browser Run sessions now accept multiple concurrent connections. Before, a session accepted only one connection at a time, and other Workers had to wait until that connection closed. Now multiple Workers can connect to the same browser at the same time.
Browser RunFeatureSep 29, 2026
Browser Run adds WebMCP to Kitesurf and moves to document.modelContext
WebMCP now works in Kitesurf sessions as well as Lab sessions. Both backends use the document.modelContext API from the WebMCP Community Group draft. Lab sessions no longer expose navigator.modelContextTesting.

Run more headless browsers concurrently with Browser Run

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Run more headless browsers concurrently with Browser Run

More from Browser Run