ua-tracer
by Paul Kinlan
ua-tracer
what does a user agent actually fetch, follow & run?
Trace okRZ5GxI
First seen: 2026-07-03 05:25:19.503 UTC
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36
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.
| Received | Δ | Kind | Method | User-Agent |
|---|---|---|---|---|
| 2026-07-03 05:25:19.503 UTC | +0 ms | homepage | GET | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 |
request headers (7){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
"accept-encoding": "gzip, deflate, br",
"host": "uatracer.com",
"traceparent": "00-5da051ef96f1c4b2a161028c22d7806f-dde0d469cec284b1-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-03 05:25:21.545 UTC | +2042 ms | apple-touch-icon | GET | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 |
request headers (10){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-463eb6019fdee8ad176a067ea0946043-108526ce83f5cf96-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-463eb6019fdee8ad176a067ea0946043-c5f9e7d145af5459-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-03 05:25:21.548 UTC | +2045 ms | preload (image) | GET | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 |
request headers (10){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-b58b495b83fdb97c0e8552b72c06c227-0079591ba0591468-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-b58b495b83fdb97c0e8552b72c06c227-ecaf020164e4240a-01",
"x-deno-userspace-tracestate": ""
}
|
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| 2026-07-03 05:25:21.550 UTC | +2047 ms | Twitter card image | GET | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 |
request headers (8){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-46682d8c73cfec65e709aaff7b280a30-83a11ad47bc87233-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-03 05:25:21.553 UTC | +2050 ms | prefetch | GET | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 |
request headers (10){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-2edfcfe4460efbaea6443c9dab43c1b4-307c56d24265b744-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-2edfcfe4460efbaea6443c9dab43c1b4-1016621361758be1-01",
"x-deno-userspace-tracestate": ""
}
|
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| 2026-07-03 05:25:21.569 UTC | +2066 ms | Open Graph image | GET | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 |
request headers (10){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-dcada93701833267e90a5e9e9fa0340f-c26e4a98f612bf79-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-dcada93701833267e90a5e9e9fa0340f-2445877cd4871b97-01",
"x-deno-userspace-tracestate": ""
}
|
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| 2026-07-03 05:25:21.661 UTC | +2158 ms | image | GET | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36 |
request headers (10){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-924645bee4a24e615999b130524d6640-d4121bde1d4a7641-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-924645bee4a24e615999b130524d6640-b5cdeed515edb8ef-01",
"x-deno-userspace-tracestate": ""
}
|
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