ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace 49AI0Fkz

First seen: 2026-06-23 13:55:22.662 UTC
User-Agent: Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

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
2026-06-23 13:55:22.662 UTC +0 ms homepage GET Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br",
  "connection": "keep-alive",
  "from": "googlebot(at)googlebot.com",
  "host": "uatracer.com",
  "traceparent": "00-965b8ab02f12d99410b5be122c382241-80120078a8cc4dc5-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-06-23 13:55:25.497 UTC +2835 ms prefetch GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36
request headers (12) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US",
  "connection": "keep-alive",
  "from": "googlebot(at)googlebot.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "sec-purpose": "prefetch",
  "traceparent": "00-d3a64e6757d1a12a7479d5ac606d2f34-5609d0d1779b85b3-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-06-23 13:55:25.523 UTC +2861 ms ES module GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US",
  "connection": "keep-alive",
  "from": "googlebot(at)googlebot.com",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-81a9f0629de28f03017ea89935ea7b7e-74217bee35f9d195-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-06-23 13:55:25.858 UTC +3196 ms CSS GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36
request headers (13) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US",
  "connection": "keep-alive",
  "from": "googlebot(at)googlebot.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-0dcdbeb86b9277f5c69973fb10474a59-b28a33c2502f712d-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-0dcdbeb86b9277f5c69973fb10474a59-dabc3541e960cba7-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-23 13:55:25.989 UTC +3327 ms iframe document GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36
request headers (14) 
{
  "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US",
  "connection": "keep-alive",
  "from": "googlebot(at)googlebot.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-587dd8f7bb8d5ac26b69d8d7bfe33455-7cae13e0ad77e84f-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-587dd8f7bb8d5ac26b69d8d7bfe33455-02b9c9c7ce88fd84-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-23 13:55:26.717 UTC +4055 ms CSS @import (nested stylesheet) GET Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36
request headers (13) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br",
  "accept-language": "en-US",
  "connection": "keep-alive",
  "from": "googlebot(at)googlebot.com",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/r/49AI0Fkz/style.css",
  "traceparent": "00-d8fe4f9665c26209674beaf027fc3de4-7b5720439320f793-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html) Chrome/148.0.7778.96 Safari/537.36",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-d8fe4f9665c26209674beaf027fc3de4-0f6dc351e4d78ea7-01",
  "x-deno-userspace-tracestate": ""
}
2026-06-23 13:55:28.569 UTC +5907 ms apple-touch-icon GET Googlebot-Image/1.0
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br",
  "connection": "keep-alive",
  "from": "googlebot(at)googlebot.com",
  "host": "uatracer.com",
  "traceparent": "00-689cd9efae21e5a6c8a9aa87fa46b2c9-41a6b0a76b76716a-01",
  "tracestate": "",
  "user-agent": "Googlebot-Image/1.0",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-06-23 13:55:28.573 UTC +5911 ms favicon GET Googlebot-Image/1.0
request headers (11) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br",
  "connection": "keep-alive",
  "from": "googlebot(at)googlebot.com",
  "host": "uatracer.com",
  "traceparent": "00-9eb4211d82db38c2da851efe5f697e4e-a5e6d2a897261fbb-01",
  "tracestate": "",
  "user-agent": "Googlebot-Image/1.0",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-9eb4211d82db38c2da851efe5f697e4e-be9540931feac973-01",
  "x-deno-userspace-tracestate": ""
}