ua-tracer by Paul Kinlan

trace hDUiMpx3

ua-tracer

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

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Trace hDUiMpx3

First seen: 2026-11-04 19:39:42.535 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
2026-11-04 19:39:42.535 UTC +0 ms homepage GET Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0
request headers (13) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "baggage": "sentry-trace_id=91938003b2644e1f8ab09677f7661b5c,sentry-environment=production,sentry-release=cec87017c90c03a11f09af8841bb4d611000feb9,sentry-public_key=23937f3f7258dcfbab13359d58e4aef6,sentry-org_id=108499",
  "connection": "keep-alive",
  "host": "uatracer.com",
  "sentry-trace": "91938003b2644e1f8ab09677f7661b5c-a1db6849bd45b8fd",
  "traceparent": "00-317b18c0899e44be8c88dd1a223d1ecb-fb77f85d84638b6d-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": "c953f259d8ab916d",
  "x-b3-traceid": "7e925c787ec48fe2204d269b28a3c8ce"
}
2026-11-04 19:39:54.043 UTC +11508 ms favicon 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=f870ebd0310e4b6d9400cb4a505fd05d,sentry-environment=production,sentry-release=cec87017c90c03a11f09af8841bb4d611000feb9,sentry-public_key=23937f3f7258dcfbab13359d58e4aef6,sentry-org_id=108499",
  "connection": "keep-alive",
  "host": "uatracer.com",
  "sentry-trace": "f870ebd0310e4b6d9400cb4a505fd05d-a6be6b5cd405d0e4",
  "traceparent": "00-d0d730439484fb964a3264016da76a4c-08e06468cdd67904-01",
  "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": "86fc0b90049445ae",
  "x-b3-traceid": "0f6ed65abc12731303a33594f203c132",
  "x-deno-userspace-traceparent": "00-d0d730439484fb964a3264016da76a4c-0fd40751121b27d3-01",
  "x-deno-userspace-tracestate": ""
}