ua-tracer by Paul Kinlan

trace MFAVrWR5

ua-tracer

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

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Trace MFAVrWR5

First seen: 2026-07-04 09:59:19.427 UTC
User-Agent: flus/2.5.1 (https://app.flus.fr/about)
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
2026-07-04 09:59:19.427 UTC +0 ms homepage GET flus/2.5.1 (https://app.flus.fr/about)
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "deflate, gzip, br, zstd",
  "host": "uatracer.com",
  "traceparent": "00-622c33865cfc2b724853d0a0034d3c77-5b28641d5ec14387-01",
  "tracestate": "",
  "user-agent": "flus/2.5.1 (https://app.flus.fr/about)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-04 09:59:21.265 UTC +1838 ms Open Graph image GET flus/2.5.1 (https://app.flus.fr/about)
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "deflate, gzip, br, zstd",
  "host": "uatracer.com",
  "traceparent": "00-0bc00ae0e84915b01cb715a76e1d8f3d-365ca9fd377ffbdb-01",
  "tracestate": "",
  "user-agent": "flus/2.5.1 (https://app.flus.fr/about)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-0bc00ae0e84915b01cb715a76e1d8f3d-1665f0c494472217-01",
  "x-deno-userspace-tracestate": ""
}