Is Browser Harness secure?

Legit.Show measured Browser Harness's Security frame at 45/100. Security headers present: HSTS. Served over HTTPS with a valid certificate.

How does Legit.Show measure Browser Harness?

Legit.Show scores seven frames — Performance, Accessibility, Security, Privacy, Reliability, Standards and Discoverability — deterministically from the public surface (URL, HTTP headers, real Lighthouse), with no LLM in the scoring path. See legit.show/methodology.

AI & Agents

Browser Harness

Source: browser-use/browser-harness · ★ 14798 · Python

Last updated 2026-06-14 · benchmark measured 2026-09-21 — deterministic & reproducible

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

71/100

7/7 frames

Top 71% of 14,148 measured · #17 of 24 in ai browser automation

Legit Benchmark — the simple average of 7 measured frames. Frames we could not measure are left out of the average, never counted as zero. Every frame is shown below with its evidence.

Checked 2026-09-21 · scores move as sites change

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To cite this score: legit.show/s/gh-browser-use-browser-harness/2026-09-21. That address never changes; this page moves with every re-measure.

Legit.Show scored Browser Harness 71/100 on 2026-09-21, measured across all 7 frames from its public surface. legit.show/s/gh-browser-use-browser-harness/2026-09-21

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 — 84/100
Accessibility — 100/100
Security — 45/100
How this compares across the catalogue: The Web Security Baseline
Privacy — 25/100
How this compares across the catalogue: The Privacy Gap
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 — 362 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

Sources and updates

Description: Taken from browser-harness.com's own website on 2026-06-14.
Code: github.com/browser-use/browser-harness.
Benchmark: Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-09-21.

Put together from public information, without Browser Harness's involvement. If anything here is wrong, tell us and a person will check it.

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