AI & Agents

Browser Harness

Last updated 2026-06-14 · benchmark checked 2026-08-09 · unchanged since 2026-08-08 — deterministic & reproducible

Open-source self-healing harness for running browser automation agents.

Is Browser Harness production-ready?

Legit.Show scores Browser Harness 71 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Browser Harness (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Accessibility; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 85/100
• Accessibility — 100/100
• Security — 45/100
• Privacy — 25/100
• Reliability — 92/100
• Standards — 92/100
• Discoverability — 60/100

What we measured

• Security headers present: HSTS.
• No Content-Security-Policy.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 406 ms to first byte.
• Returns a proper 404 for unknown routes.
• 0 of 0 sampled routes reachable.
• No privacy policy found.
• Sets cookies / loads scripts with no consent prompt.

Who it's for

AI developers · Browser automation engineers · LLM prompt engineers · Agent builders

Visit Browser Harness → · Alternatives to Browser Harness → · How this was measured →