ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace kPD4XQWG

First seen: 2026-06-26 22:48:13.650 UTC
User-Agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Mobile 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
2026-06-26 22:48:13.650 UTC +0 ms homepage GET Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Mobile Safari/537.36
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "host": "uatracer.com",
  "traceparent": "00-f7b2df385560cd289860e17f91a4c61c-97ad3b505c4e9865-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Mobile Safari/537.36",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-06-26 22:48:30.264 UTC +16614 ms favicon GET Mozilla/5.0 (iPhone; CPU iPhone OS 17_0_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0.3 Mobile/15E148 Safari/604.1 RDDocuments/8.7.2.978
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "host": "uatracer.com",
  "traceparent": "00-ab96e57de09f31b09b497889fcdab452-29ef3c6e4bfd5c89-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 17_0_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0.3 Mobile/15E148 Safari/604.1 RDDocuments/8.7.2.978",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-ab96e57de09f31b09b497889fcdab452-88ffb2d5776cbeef-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-26 22:48:30.267 UTC +16617 ms apple-touch-icon GET Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 Edg/121.0.0.0
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate",
  "host": "uatracer.com",
  "traceparent": "00-945a59ec23cc3f5bc519543a3776ae06-9859bd8c79b00098-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36 Edg/121.0.0.0",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-945a59ec23cc3f5bc519543a3776ae06-78c39f5a5238c9ac-01",
  "x-deno-userspace-tracestate": ""
}