ua-tracer by Paul Kinlan

trace 1YfqHcz6

ua-tracer

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

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Trace 1YfqHcz6

First seen: 2026-09-14 19:43:48.363 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
2026-09-14 19:43:48.363 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=1eb3330371d44fc58adb51c03f27459d,sentry-environment=production,sentry-release=2c0818b70d06434c2881478a108ed38b613a2c89,sentry-public_key=23937f3f7258dcfbab13359d58e4aef6,sentry-org_id=108499",
  "connection": "keep-alive",
  "host": "uatracer.com",
  "sentry-trace": "1eb3330371d44fc58adb51c03f27459d-96bcdefe05887826",
  "traceparent": "00-ee18edf06438290742ea5f97665c8ad4-53f4f817c71ee13c-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": "55ef0598e07270e7",
  "x-b3-traceid": "d82dc0e4884319d7026ea159fa79ab3b",
  "x-deno-userspace-traceparent": "00-ee18edf06438290742ea5f97665c8ad4-41a3716eb49d97b4-01",
  "x-deno-userspace-tracestate": ""
}