ua-tracer by Paul Kinlan

trace 95m7ocWi

ua-tracer

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

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Trace 95m7ocWi

First seen: 2026-09-22 20:26:42.654 UTC
User-Agent: Mozilla/5.0 Firefox/143.0
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
2026-09-22 20:26:42.654 UTC +0 ms homepage GET Mozilla/5.0 Firefox/143.0
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "accept-language": "en-US,en;q=0.9",
  "host": "uatracer.com",
  "traceparent": "00-3264998adb1ac7405c52161e657d7590-59104d0d9366a7c6-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 Firefox/143.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-3264998adb1ac7405c52161e657d7590-a30363c0526ecc6b-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-22 20:26:43.894 UTC +1240 ms CSS GET Mozilla/5.0 Firefox/143.0
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "accept-language": "en-US,en;q=0.9",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-a24a216ccb512de78c1aaca520938ecd-e1652e669fc12f0e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 Firefox/143.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-a24a216ccb512de78c1aaca520938ecd-04869ee8a3e4e4cf-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-22 20:26:44.387 UTC +1733 ms CSS @import (nested stylesheet) GET Mozilla/5.0 Firefox/143.0
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "accept-language": "en-US,en;q=0.9",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-b784f4db4a2967c5b79ac26f4b83923b-3408a6c70651a5f8-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 Firefox/143.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-b784f4db4a2967c5b79ac26f4b83923b-eb4b044597e2408e-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-22 20:26:46.866 UTC +4212 ms CSS @font-face GET Mozilla/5.0 Firefox/143.0
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "accept-language": "en-US,en;q=0.9",
  "host": "uatracer.com",
  "referer": "https://uatracer.com",
  "traceparent": "00-19d041f394b5881a32351ad9a14fed21-5014e2779bfac97d-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 Firefox/143.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-19d041f394b5881a32351ad9a14fed21-0362efbccd6b8592-01",
  "x-deno-userspace-tracestate": ""
}