ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace LRpaN54P

First seen: 2026-06-25 06:39:13.509 UTC
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; BuiltWith/1.4; rb.gy/xprgqj) 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
2026-06-25 06:39:13.509 UTC +0 ms homepage GET Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; BuiltWith/1.4; rb.gy/xprgqj) Chrome/124.0.0.0 Safari/537.36
request headers (17) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US,en;q=0.9,es;q=0.8",
  "cache-control": "max-age=0",
  "connection": "keep-alive",
  "host": "uatracer.com",
  "sec-fetch-dest": "document",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "none",
  "sec-fetch-user": "?1",
  "traceparent": "00-49b7f46fee4c64a60698ad451a1c0eb3-4d2b2c4ca6eb8952-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; BuiltWith/1.4; rb.gy/xprgqj) Chrome/124.0.0.0 Safari/537.36",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-49b7f46fee4c64a60698ad451a1c0eb3-4e69c9d0c8224a71-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-25 06:39:26.519 UTC +13010 ms JS GET Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; BuiltWith/1.4; rb.gy/xprgqj) Chrome/124.0.0.0 Safari/537.36
request headers (15) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US,en;q=0.9,es;q=0.8",
  "cache-control": "max-age=0",
  "connection": "keep-alive",
  "host": "uatracer.com",
  "sec-fetch-dest": "document",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "none",
  "sec-fetch-user": "?1",
  "traceparent": "00-1325087175b066b6c4858c24a1b4d61a-2ac2536ecaa18fb9-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; BuiltWith/1.4; rb.gy/xprgqj) Chrome/124.0.0.0 Safari/537.36",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
2026-06-25 06:39:26.559 UTC +13050 ms ES module GET Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; BuiltWith/1.4; rb.gy/xprgqj) Chrome/124.0.0.0 Safari/537.36
request headers (15) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US,en;q=0.9,es;q=0.8",
  "cache-control": "max-age=0",
  "connection": "keep-alive",
  "host": "uatracer.com",
  "sec-fetch-dest": "document",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "none",
  "sec-fetch-user": "?1",
  "traceparent": "00-cc7fd3e1d07f9952316989e3036eb581-79401e213aa1d58c-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko; compatible; BuiltWith/1.4; rb.gy/xprgqj) Chrome/124.0.0.0 Safari/537.36",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}