ua-tracer by Paul Kinlan

trace p26PSMrk

ua-tracer

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

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Trace p26PSMrk

First seen: 2026-08-19 02:40:21.993 UTC
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0
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
2026-08-19 02:40:21.993 UTC +0 ms homepage GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0
request headers (12) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,zh;q=0.9,en;q=0.8",
  "dnt": "1",
  "host": "uatracer.com",
  "traceparent": "00-0ae7948cfea03d339a03177f5fe9990e-329f7c0d8488c896-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-0ae7948cfea03d339a03177f5fe9990e-0fae11cc321e5142-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-19 02:40:26.201 UTC +4208 ms JS GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0
request headers (12) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "en-US,en;q=0.8,fr;q=0.5,de;q=0.3",
  "cache-control": "max-age=0",
  "host": "uatracer.com",
  "traceparent": "00-a5a1a518e1441c6cc894ab85f69b43d2-7d1ef83bbb3f9358-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-a5a1a518e1441c6cc894ab85f69b43d2-8bd1a40db4861042-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-19 02:40:26.205 UTC +4212 ms ES module GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0
request headers (11) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "en-GB,en;q=0.9,fr;q=0.8",
  "host": "uatracer.com",
  "traceparent": "00-b7ac694d492df3dcace4bf1a891233ac-a5d5de111b6f3e98-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-b7ac694d492df3dcace4bf1a891233ac-47e22878dd29a490-01",
  "x-deno-userspace-tracestate": ""
}