ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace nA3lAUQN

First seen: 2026-06-28 05:53:27.741 UTC
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 14_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.4 Safari/605.1.15

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
2026-06-28 05:53:27.741 UTC +0 ms homepage GET Mozilla/5.0 (Macintosh; Intel Mac OS X 14_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.4 Safari/605.1.15
request headers (17) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "en-US,en;q=0.9",
  "cdn-loop": "cloudflare; loops=1",
  "cf-ew-via": "15",
  "cf-ray": "a12a6e642b6c18fb-FRA",
  "cf-visitor": "{\"scheme\":\"https\"}",
  "cf-worker": "rickjefferson.workers.dev",
  "host": "uatracer.com",
  "traceparent": "00-056bf7d6dea3351550697ca2362bca35-0ee160e91e71fa61-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 14_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.4 Safari/605.1.15",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-056bf7d6dea3351550697ca2362bca35-12f129ab88efe3a0-01",
  "x-deno-userspace-tracestate": "",
  "x-forwarded-for": "2a01:4f8:c014:d0fc::1",
  "x-forwarded-proto": "https"
}