ua-tracer by Paul Kinlan

trace lyFZjlWv

ua-tracer

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

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Trace lyFZjlWv

First seen: 2026-07-13 14:05:51.353 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
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
2026-07-13 14:05:51.353 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 (12) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "host": "uatracer.com",
  "priority": "u=0, i",
  "sec-fetch-dest": "document",
  "sec-fetch-mode": "navigate",
  "sec-fetch-site": "none",
  "traceparent": "00-a220a2853ba3a663dbe602ba455056ca-4a5a98fcde4318af-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"
}
2026-07-13 14:05:53.779 UTC +2426 ms Open Graph image GET com.apple.WebKit.Networking/21624.2.5.11.8 Network/5812.121.1 macOS/26.5.2
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=lyFZjlWv",
  "host": "uatracer.com",
  "priority": "u=7, i",
  "traceparent": "00-80d66d454a32e94c7ffddec0d958fe43-e7fac3d63ca9016a-01",
  "tracestate": "",
  "user-agent": "com.apple.WebKit.Networking/21624.2.5.11.8 Network/5812.121.1 macOS/26.5.2",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-13 14:05:53.782 UTC +2429 ms favicon GET com.apple.WebKit.Networking/21624.2.5.11.8 Network/5812.121.1 macOS/26.5.2
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=lyFZjlWv",
  "host": "uatracer.com",
  "priority": "u=7, i",
  "traceparent": "00-3aa1648fbbd74243bfc258b4779269c7-e10857a9c06f2955-01",
  "tracestate": "",
  "user-agent": "com.apple.WebKit.Networking/21624.2.5.11.8 Network/5812.121.1 macOS/26.5.2",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-13 14:05:53.787 UTC +2434 ms apple-touch-icon GET com.apple.WebKit.Networking/21624.2.5.11.8 Network/5812.121.1 macOS/26.5.2
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=lyFZjlWv",
  "host": "uatracer.com",
  "priority": "u=7, i",
  "traceparent": "00-7f4fd77c340df0b6a3e886fa3351b971-0b920d2b831f75f4-01",
  "tracestate": "",
  "user-agent": "com.apple.WebKit.Networking/21624.2.5.11.8 Network/5812.121.1 macOS/26.5.2",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}