ua-tracer by Paul Kinlan

trace vHc2IH48

ua-tracer

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

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Trace vHc2IH48

First seen: 2026-10-27 22:16:58.090 UTC
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0
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
2026-10-27 22:16:58.090 UTC +0 ms homepage GET Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0
request headers (15) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "baggage": "sentry-trace_id=5d0328d21da24d10ad4c46520f5cb1af,sentry-environment=production,sentry-release=b80d19a187a115d32df83fbc75c242d37615dcb7,sentry-public_key=23937f3f7258dcfbab13359d58e4aef6,sentry-org_id=108499",
  "connection": "keep-alive",
  "host": "uatracer.com",
  "sentry-trace": "5d0328d21da24d10ad4c46520f5cb1af-8e3bb8cbf0153ea7",
  "traceparent": "00-c71bffd66fbacc53bbb2f6c6a1845626-d5864e0b95c85287-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-b3-sampled": "0",
  "x-b3-spanid": "f02333c1f679e2f4",
  "x-b3-traceid": "4ebdcbca852151a8dec68aa2193941ad",
  "x-deno-userspace-traceparent": "00-c71bffd66fbacc53bbb2f6c6a1845626-651f13a43615fd50-01",
  "x-deno-userspace-tracestate": ""
}