ua-tracer by Paul Kinlan

trace sZrfRMYl

ua-tracer

what does a user agent actually fetch, follow & run?

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Trace sZrfRMYl

First seen: 2026-11-06 18:18:12.908 UTC
User-Agent: Mozilla/5.0 (compatible; ibou-search/2.0; +https://ibou.com/crawlers.html)
Bot verification: Not a known bot (no IP-range check applies).

What this user agent did

Directly-referenced assets:

✗ fetched CSS ✗ fetched JS ✗ fetched image ✗ fetched font (HTML)

Document-level link hints:

✗ fetched favicon ✗ fetched apple-touch-icon ✗ fetched web manifest ✗ fetched preload ✗ fetched prefetch

Second-level follows (proves it parsed the linking file):

✗ followed CSS background-image ✗ followed CSS @font-face ✗ followed manifest icon ✗ followed CSS @import

Frames (does it descend into iframes?):

✗ fetched iframe document ✗ descended into iframe (loaded inner image)

Reporting (a report-only CSP is violated by inline styles; reports can arrive via HTTP headers with no JS, or via in-page beacons):

✗ sent a CSP/Reporting report (any path) ✗ delivered via report-uri/Report-To header (no JS) ✗ delivered via in-page beacon (securitypolicyviolation / ReportingObserver)

Social embed (Open Graph / Twitter card images):

✗ fetched og:image ✗ fetched twitter:image

JavaScript execution:

✗ EXECUTED classic JS ✗ EXECUTED ES module ✗ posted client timing

Server-side request waterfall

Every request the server received for this trace, in receive order. +ms is the delta from the homepage request.

ReceivedΔKindMethodUser-Agent
2026-11-06 18:18:12.908 UTC +0 ms homepage GET Mozilla/5.0 (compatible; ibou-search/2.0; +https://ibou.com/crawlers.html)
request headers (13) 
{
  "accept": "text/html;q=0.95,text/*;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip,deflate",
  "connection": "Keep-Alive",
  "from": "network-abuse@ibou.com",
  "host": "uatracer.com",
  "if-modified-since": "Fri, 30 Oct 2026 16:18:00 GMT",
  "signature": "sig1=:72sm83nFroyPWuRXLb4acdw39+q6o6//HAH6e0UiwUMPkt0XMlmwd2iky57unSHUWGKYoZAvwC15h3B3iy2pBA==:",
  "signature-agent": "https://ibou.io",
  "signature-input": "sig1=(\"@authority\" \"signature-agent\");created=1793989092;expires=1794075492;nonce=\"1650618ee48640a4\";keyid=\"Dx8uGw1Um6z46pxcPQvlaj2_uLPeBvkeYPzV2Pbhmck\";alg=\"ed25519\";tag=\"web-bot-auth\"",
  "traceparent": "00-6c57fa843b74dfc9df228218821f8ead-9e9fcaa0da43a0dd-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; ibou-search/2.0; +https://ibou.com/crawlers.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}