ua-tracer by Paul Kinlan

trace QUMlx1xZ

ua-tracer

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

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Trace QUMlx1xZ

First seen: 2026-07-19 06:14:54.053 UTC
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 15.7; rv:149.0) Gecko/20100101 Firefox/149.0
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
2026-07-19 06:14:54.053 UTC +0 ms homepage GET Mozilla/5.0 (Macintosh; Intel Mac OS X 15.7; rv:149.0) Gecko/20100101 Firefox/149.0
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "host": "uatracer.com",
  "traceparent": "00-a48ac27c1e20f61667decbe23e38def5-75021c310ba59f3c-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 15.7; rv:149.0) Gecko/20100101 Firefox/149.0",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-19 06:14:56.139 UTC +2086 ms ES module GET Mozilla/5.0 (Macintosh; Intel Mac OS X 15_7_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Safari/605.1.15
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "host": "uatracer.com",
  "traceparent": "00-d467b9a783fe035bb4081a0243bb5b41-5d57b2c4853a3514-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 15_7_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Safari/605.1.15",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-19 06:14:56.529 UTC +2476 ms JS GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:149.0) Gecko/20100101 Firefox/149.0
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "host": "uatracer.com",
  "traceparent": "00-8d1cb2e72435870f84a53a93dd9a812d-2d448ad797e6199f-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:149.0) Gecko/20100101 Firefox/149.0",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-19 06:14:57.457 UTC +3404 ms web app manifest GET Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36 Edg/146.0.3856.109
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "host": "uatracer.com",
  "traceparent": "00-45ae0ae957a26b91d4d1de6c5ddd708c-f4f642d57fbbe32c-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36 Edg/146.0.3856.109",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}