ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace xxDULbsg

First seen: 2026-07-03 10:31:32.586 UTC
User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Mobile/15E148 Safari/604.1
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
2026-07-03 10:31:32.586 UTC +0 ms homepage GET Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Mobile/15E148 Safari/604.1
request headers (8) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
  "accept-encoding": "gzip, deflate",
  "cache-control": "no-cache",
  "host": "uatracer.com",
  "traceparent": "00-82c3712f149d07358e0545fe3b861274-183ca8c4c61e3838-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Mobile/15E148 Safari/604.1",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-03 10:31:34.352 UTC +1766 ms Open Graph image GET Dart/3.11 (dart:io)
request headers (6) 
{
  "accept-encoding": "gzip",
  "host": "uatracer.com",
  "traceparent": "00-c5b31630c75467e50a3bba3d76860a42-24d276fdcbc9e005-01",
  "tracestate": "",
  "user-agent": "Dart/3.11 (dart:io)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}