ua-tracer by Paul Kinlan

trace x9JogiJf

ua-tracer

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

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Trace x9JogiJf

First seen: 2026-08-20 15:39:09.533 UTC
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0
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
2026-08-20 15:39:09.533 UTC +0 ms homepage GET Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0
request headers (16) 
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "en-US,en;q=1.0",
  "host": "uatracer.com",
  "sec-ch-ua": "\"Not?A_Brand\";v=\"99\", \"Chromium\";v=\"130\"",
  "sec-fetch-dest": "script",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "sec-gpc": "1",
  "traceparent": "00-550444af02242fc4459baaa494698867-72e355f74c1c1f8e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-contact": "",
  "x-deno-userspace-traceparent": "00-550444af02242fc4459baaa494698867-4d2acf229c482062-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-20 15:39:11.215 UTC +1682 ms JS GET Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0
request headers (15) 
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "en-US,en;q=1.0",
  "host": "uatracer.com",
  "sec-ch-ua": "\"Not?A_Brand\";v=\"99\", \"Chromium\";v=\"130\"",
  "sec-fetch-dest": "script",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "sec-gpc": "1",
  "traceparent": "00-93afa4ef3e0dd2f8fc955c4ff7098271-6c5582844e9edb2e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-93afa4ef3e0dd2f8fc955c4ff7098271-48742096e57da08f-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-20 15:39:12.212 UTC +2679 ms ES module GET Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0
request headers (15) 
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "en-US,en;q=1.0",
  "host": "uatracer.com",
  "sec-ch-ua": "\"Not?A_Brand\";v=\"99\", \"Chromium\";v=\"130\"",
  "sec-fetch-dest": "script",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "sec-gpc": "1",
  "traceparent": "00-66acc9ab07cee26297eb13fe303987b2-9ab6d8d69a6c874a-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-66acc9ab07cee26297eb13fe303987b2-05070df4b8990041-01",
  "x-deno-userspace-tracestate": ""
}