ua-tracer by Paul Kinlan

trace ApiPzHDc

ua-tracer

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

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Trace ApiPzHDc

First seen: 2026-08-08 06:48:22.840 UTC
User-Agent: Mozilla/5.0 (Linux; Android 16; V2528A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.200 Mobile Safari/537.36 VivoBrowser/30.2.3.1
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
2026-08-08 06:48:22.840 UTC +0 ms homepage GET Mozilla/5.0 (Linux; Android 16; V2528A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.200 Mobile Safari/537.36 VivoBrowser/30.2.3.1
request headers (15) 
{
  "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=0.7",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7",
  "host": "uatracer.com",
  "priority": "u=1, i",
  "sec-fetch-dest": "document",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "none",
  "traceparent": "00-05441a50eae6f9c2fbf70b2f235b3a23-4c1869320e54a858-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (Linux; Android 16; V2528A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.200 Mobile Safari/537.36 VivoBrowser/30.2.3.1",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-05441a50eae6f9c2fbf70b2f235b3a23-d9fc9f14a88271c1-01",
  "x-deno-userspace-tracestate": ""
}