ua-tracer by Paul Kinlan

trace sGYyNfUe

ua-tracer

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

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Trace sGYyNfUe

First seen: 2026-07-14 00:52:39.037 UTC
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0
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
2026-07-14 00:52:39.037 UTC +0 ms homepage GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0
request headers (8) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "host": "uatracer.com",
  "referer": "https://www.google.com/",
  "traceparent": "00-8b8481dadc68584178946a5d0b96d889-d0c486a6bd29c3f2-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 00:52:41.956 UTC +2919 ms image GET Bun/1.3.14
request headers (8) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-a8a53889aa3478f0b578df761bab92be-6ae1c01690fb0364-01",
  "tracestate": "",
  "user-agent": "Bun/1.3.14",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 00:52:41.975 UTC +2938 ms favicon GET Bun/1.3.14
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-90a0372f65babeb25624e313d3164262-243c362f8f57d83b-01",
  "tracestate": "",
  "user-agent": "Bun/1.3.14",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-90a0372f65babeb25624e313d3164262-ab9cb9051ac38b9f-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-14 00:52:42.052 UTC +3015 ms CSS GET Bun/1.3.14
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-ff376201d37346f49c4486510468f2d9-1a7839cd2a299ff4-01",
  "tracestate": "",
  "user-agent": "Bun/1.3.14",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-ff376201d37346f49c4486510468f2d9-be161a82edb0e5aa-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-14 00:52:43.556 UTC +4519 ms CSS @import (nested stylesheet) GET Bun/1.3.14
request headers (8) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-cb640976dbbb8fa0fe2366f4a86e1f25-2933e8fcde5cf98d-01",
  "tracestate": "",
  "user-agent": "Bun/1.3.14",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 00:52:49.432 UTC +10395 ms CSS background-image GET Bun/1.3.14
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-20d5457015bfca541d213fc9d1336f88-850208d7af85df39-01",
  "tracestate": "",
  "user-agent": "Bun/1.3.14",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-20d5457015bfca541d213fc9d1336f88-c492e25d2f59daf4-01",
  "x-deno-userspace-tracestate": ""
}