ua-tracer by Paul Kinlan

trace C5PO423w

ua-tracer

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

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Trace C5PO423w

First seen: 2026-09-10 10:56:51.777 UTC
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0
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
2026-09-10 10:56:51.777 UTC +0 ms homepage GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "br, gzip, deflate, zstd",
  "accept-language": "*",
  "connection": "close",
  "host": "uatracer.com",
  "referer": "https://www.google.com/",
  "sec-fetch-mode": "cors",
  "traceparent": "00-ee173ccc77538a13fedc232e09c1a3ca-cf8e97a9f8e8f264-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:153.0) Gecko/20100101 Firefox/153.0",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-09-10 10:56:55.799 UTC +4022 ms CSS GET node
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "br, gzip, deflate, zstd",
  "accept-language": "*",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "sec-fetch-mode": "cors",
  "traceparent": "00-89a41916199cdafb1d7c507a66b24957-30489e773b5f81d5-01",
  "tracestate": "",
  "user-agent": "node",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-89a41916199cdafb1d7c507a66b24957-6db872f338aadb6c-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-10 10:56:55.803 UTC +4026 ms favicon GET node
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "br, gzip, deflate, zstd",
  "accept-language": "*",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "sec-fetch-mode": "cors",
  "traceparent": "00-32f3f4c15055dc998c877a1ee5390206-63cd14dff9b8f4c0-01",
  "tracestate": "",
  "user-agent": "node",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-32f3f4c15055dc998c877a1ee5390206-685c3be6f0eb35ab-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-10 10:56:55.852 UTC +4075 ms image GET node
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "br, gzip, deflate, zstd",
  "accept-language": "*",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "sec-fetch-mode": "cors",
  "traceparent": "00-322d133ae9f581defcca7fbc6179b51a-30dc2a488ad00f5b-01",
  "tracestate": "",
  "user-agent": "node",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-09-10 10:56:57.216 UTC +5439 ms CSS background-image GET node
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "br, gzip, deflate, zstd",
  "accept-language": "*",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "sec-fetch-mode": "cors",
  "traceparent": "00-6fad6818e66ff65ae24cc74bfda3c18b-a5b2049aee3e31ea-01",
  "tracestate": "",
  "user-agent": "node",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-6fad6818e66ff65ae24cc74bfda3c18b-2473e4cb61ef21cc-01",
  "x-deno-userspace-tracestate": ""
}
2026-09-10 10:56:57.221 UTC +5444 ms CSS @import (nested stylesheet) GET node
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "br, gzip, deflate, zstd",
  "accept-language": "*",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "sec-fetch-mode": "cors",
  "traceparent": "00-e84e77500db0c808a4e856859ab689e6-a2fe324bb6bea32f-01",
  "tracestate": "",
  "user-agent": "node",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-e84e77500db0c808a4e856859ab689e6-7dc7b2ed098c8254-01",
  "x-deno-userspace-tracestate": ""
}