ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace JH51NEu9

First seen: 2026-06-25 05:45:27.423 UTC
User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 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 05:45:27.423 UTC +0 ms homepage GET Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36
request headers (9) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-charset": "GBK,utf-8;q=0.7,*;q=0.3",
  "accept-language": "zh-CN,zh;q=0.8",
  "host": "uatracer.com",
  "referer": "http://uatracer.com",
  "traceparent": "00-4596890a73bf51bf1151d124306a4672-7cc77a99a35a3ee6-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-06-25 05:45:38.480 UTC +11057 ms favicon GET Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36
request headers (11) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-charset": "GBK,utf-8;q=0.7,*;q=0.3",
  "accept-language": "zh-CN,zh;q=0.8",
  "host": "uatracer.com",
  "referer": "https://uatracer.com",
  "traceparent": "00-647cede77e622d6ccc96f764c6a34bd8-42072214816e6c64-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-647cede77e622d6ccc96f764c6a34bd8-8aae4fcdd16808bf-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-25 05:45:47.165 UTC +19742 ms JS GET Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36
request headers (9) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-charset": "GBK,utf-8;q=0.7,*;q=0.3",
  "accept-language": "zh-CN,zh;q=0.8",
  "host": "uatracer.com",
  "referer": "http://uatracer.com/r/JH51NEu9/main.js",
  "traceparent": "00-b0ef5bd34cfce30c6a54d2ec3a723724-10592ef7e2adcfad-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-06-25 05:45:53.193 UTC +25770 ms ES module GET Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36
request headers (9) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-charset": "GBK,utf-8;q=0.7,*;q=0.3",
  "accept-language": "zh-CN,zh;q=0.8",
  "host": "uatracer.com",
  "referer": "http://uatracer.com/r/JH51NEu9/module.js",
  "traceparent": "00-e03d5390465e45fe32a1b7e97470cc06-669ec560d0ea9a6d-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}