ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace v5TlkM9a

First seen: 2026-06-24 14:53:29.418 UTC
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 13_6_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

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
2026-06-24 14:53:29.418 UTC +0 ms homepage GET Mozilla/5.0 (Macintosh; Intel Mac OS X 13_6_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
request headers (16) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip, deflate",
  "accept-language": "en-US,en;q=0.9",
  "connection": "Keep-Alive",
  "dnt": "1",
  "host": "uatracer.com",
  "referer": "http://uatracer.com/",
  "sec-ch-ua": "\"Google Chrome\";v=\"124\", \"Chromium\";v=\"124\", \"Not-A.Brand\";v=\"99\"",
  "sec-fetch-dest": "document",
  "sec-fetch-mode": "navigate",
  "sec-fetch-site": "none",
  "sec-fetch-user": "?1",
  "traceparent": "00-6ce93453f6d6a4786783b59c2fad6ff1-b4c937a1670d3410-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 13_6_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-06-24 14:53:30.270 UTC +852 ms JS GET Mozilla/5.0 (Linux; Android 13; Pixel 7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Mobile Safari/537.36
request headers (10) 
{
  "accept-encoding": "gzip, deflate",
  "accept-language": "en-US,en,*;q=0.5",
  "connection": "Close",
  "host": "uatracer.com",
  "traceparent": "00-1238670e6afa4d7fde168ac3aeff9e5a-b3b55b7afe1afd28-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Linux; Android 13; Pixel 7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Mobile Safari/537.36",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-1238670e6afa4d7fde168ac3aeff9e5a-a6800d75f4c6826b-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-24 14:53:30.334 UTC +916 ms ES module GET Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Brave/1.71.121
request headers (8) 
{
  "accept-encoding": "gzip, deflate",
  "accept-language": "en-US,en,*;q=0.5",
  "connection": "Close",
  "host": "uatracer.com",
  "traceparent": "00-8b6531eb2465dc4d3614b5380ba4ffd6-16bdb430f42620cc-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Brave/1.71.121",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}