ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace K1sT6eu9

First seen: 2026-06-22 12:25:10.882 UTC
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.4 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.4 facebookexternalhit/1.1 Facebot Twitterbot/1.0

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
2026-06-22 12:25:10.882 UTC +0 ms homepage GET Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.4 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.4 facebookexternalhit/1.1 Facebot Twitterbot/1.0
request headers (14) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-GB,en-US;q=0.9,en;q=0.8",
  "host": "ua-tracer.paulkinlan-ea.deno.net",
  "priority": "u=0, i",
  "sec-fetch-dest": "document",
  "sec-fetch-mode": "navigate",
  "sec-fetch-site": "none",
  "traceparent": "00-08adcc7df2b74766aecef5a1d406aa02-848712220903d16e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.4 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.4 facebookexternalhit/1.1 Facebot Twitterbot/1.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-08adcc7df2b74766aecef5a1d406aa02-840b61e6dd39d2a7-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-22 12:25:11.484 UTC +602 ms Open Graph image GET NetworkingExtension/8624.2.5.10.4 Network/5812.122.1 iOS/26.5
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-GB,en-US;q=0.9,en;q=0.8",
  "host": "ua-tracer.paulkinlan-ea.deno.net",
  "priority": "u=3, i",
  "traceparent": "00-4b071fd89a0b2980bc5b735f994bcde2-f9d52f22af7af611-01",
  "tracestate": "",
  "user-agent": "NetworkingExtension/8624.2.5.10.4 Network/5812.122.1 iOS/26.5",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-06-22 12:25:11.486 UTC +604 ms apple-touch-icon GET NetworkingExtension/8624.2.5.10.4 Network/5812.122.1 iOS/26.5
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-GB,en-US;q=0.9,en;q=0.8",
  "host": "ua-tracer.paulkinlan-ea.deno.net",
  "priority": "u=3, i",
  "traceparent": "00-647ac8eae7cac571b80351071acac48b-cad47dbeec4f2d89-01",
  "tracestate": "",
  "user-agent": "NetworkingExtension/8624.2.5.10.4 Network/5812.122.1 iOS/26.5",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-06-22 12:25:11.486 UTC +604 ms favicon GET NetworkingExtension/8624.2.5.10.4 Network/5812.122.1 iOS/26.5
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-GB,en-US;q=0.9,en;q=0.8",
  "host": "ua-tracer.paulkinlan-ea.deno.net",
  "priority": "u=3, i",
  "traceparent": "00-a72882546113810a8890aee036e7fda0-501f6232544dedf3-01",
  "tracestate": "",
  "user-agent": "NetworkingExtension/8624.2.5.10.4 Network/5812.122.1 iOS/26.5",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}