ua-tracer by Paul Kinlan

trace UMFPzE9d

ua-tracer

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

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Trace UMFPzE9d

First seen: 2026-07-09 10:12:28.153 UTC
User-Agent: Mozilla/5.0 (compatible; SaaSBrowserBot/1.0; +https://saasbrowser.com/bot)
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
2026-07-09 10:12:28.153 UTC +0 ms homepage GET Mozilla/5.0 (compatible; SaaSBrowserBot/1.0; +https://saasbrowser.com/bot)
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "gzip;q=1.0,deflate;q=0.6,identity;q=0.3",
  "baggage": "sentry-trace_id=e0d400947c084c618a379d68a95affd7,sentry-environment=production,sentry-release=158cfdf3d29ff0c572e4dd658dc54b7c12935dcd,sentry-public_key=ac36109204837ae766818e5774a2e8e2",
  "connection": "close",
  "host": "uatracer.com",
  "sentry-trace": "e0d400947c084c618a379d68a95affd7-3b467b5614c34285",
  "traceparent": "00-e2844a5f58f7bacadcbe55c2ac705bc7-d036744e5c3c6d9b-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; SaaSBrowserBot/1.0; +https://saasbrowser.com/bot)",
  "via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-e2844a5f58f7bacadcbe55c2ac705bc7-70997c9297498f3f-01",
  "x-deno-userspace-tracestate": ""
}