ua-tracer
by Paul Kinlan
ua-tracer
what does a user agent actually fetch, follow & run?
Trace ZBK06nSF
First seen: 2026-06-26 17:19:12.662 UTC
User-Agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36
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 |
|---|---|---|---|---|
| 2026-06-26 17:19:12.662 UTC | +0 ms | homepage | GET | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (19){
"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, zstd",
"accept-language": "en-US-u-mu-celsius",
"host": "uatracer.com",
"priority": "u=0, i",
"referer": "android-app://com.linkedin.android/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?1",
"sec-ch-ua-platform": "\"Android\"",
"sec-fetch-dest": "document",
"sec-fetch-mode": "navigate",
"sec-fetch-site": "cross-site",
"traceparent": "00-5e6e551e9722ebd726d9c74796a3b1b9-36e5e5e9ee2c9f99-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-5e6e551e9722ebd726d9c74796a3b1b9-bd25d05084307398-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-06-26 17:19:13.325 UTC | +663 ms | CSS | GET | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (18){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"host": "uatracer.com",
"priority": "u=0",
"referer": "https://uatracer.com/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?1",
"sec-ch-ua-platform": "\"Android\"",
"sec-fetch-dest": "style",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-fa33dda0020c83bde0c370bbebb6588e-15863350c16dfb34-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-fa33dda0020c83bde0c370bbebb6588e-b6dd1f1fb17e8147-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-06-26 17:19:13.329 UTC | +667 ms | font (HTML) | GET | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (19){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"priority": "u=1",
"referer": "https://uatracer.com/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?1",
"sec-ch-ua-platform": "\"Android\"",
"sec-fetch-dest": "font",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-ac2b5c6c06bb92b2c7b8c0a183eb56ab-49813a24bff22edb-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-ac2b5c6c06bb92b2c7b8c0a183eb56ab-b02e01d2433aaf4b-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-06-26 17:19:13.357 UTC | +695 ms | preload (image) | GET | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (18){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"host": "uatracer.com",
"priority": "i",
"referer": "https://uatracer.com/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?1",
"sec-ch-ua-platform": "\"Android\"",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-8b86c267b78a2d6c01d4b9da2f2f198c-da9d90ef23aedb18-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-8b86c267b78a2d6c01d4b9da2f2f198c-58180f81985876a6-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-06-26 17:19:13.421 UTC | +759 ms | prefetch | GET | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (19){
"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, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"host": "uatracer.com",
"priority": "u=4, i",
"referer": "https://uatracer.com/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?1",
"sec-ch-ua-platform": "\"Android\"",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-purpose": "prefetch",
"traceparent": "00-0e43ebb47f7fe3ec3fd5ae745af37824-cda2ed95eeea818c-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-0e43ebb47f7fe3ec3fd5ae745af37824-03b7628ced26b989-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-06-26 17:19:13.432 UTC | +770 ms | image | GET | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (18){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"host": "uatracer.com",
"priority": "i",
"referer": "https://uatracer.com/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?1",
"sec-ch-ua-platform": "\"Android\"",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-99f126b010c1b87bfba67f2576bc50c0-f6ede028c28dadb8-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-99f126b010c1b87bfba67f2576bc50c0-2af5e1dde140f481-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-06-26 17:19:13.433 UTC | +771 ms | Reporting API report (POST) | POST | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (14){
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"content-length": "543",
"content-type": "application/reports+json",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"priority": "u=4, i",
"traceparent": "00-cd5b945320a67c420c955ab22f521025-4621a4c661a8da4f-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-cd5b945320a67c420c955ab22f521025-b0b6dd131fb9906b-01",
"x-deno-userspace-tracestate": "",
"x-report-body": "[{\"age\":7,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://uatracer.com/\",\"effectiveDirective\":\"style-src-elem\",\"lineNumber\":9,\"originalPolicy\":\"style-src 'self'; report-uri /r/ZBK06nSF/csp-report; report-to ua-tracer\",\"referrer\":\"android-app://com.linkedin.android/\",\"sample\":\"\",\"sourceFile\":\"https://uatracer.com/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"user_agent\":\"Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36\"}]"
}
|
||||
| 2026-06-26 17:19:13.459 UTC | +797 ms | iframe document | GET | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (19){
"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, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"host": "uatracer.com",
"priority": "u=0, i",
"referer": "https://uatracer.com/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?1",
"sec-ch-ua-platform": "\"Android\"",
"sec-fetch-dest": "iframe",
"sec-fetch-mode": "navigate",
"sec-fetch-site": "same-origin",
"traceparent": "00-f9eeb718cbf3a5f96df25696173129ed-73a3eebe42e31826-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-f9eeb718cbf3a5f96df25696173129ed-9ef8d99a23f76b57-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-06-26 17:19:13.487 UTC | +825 ms | JS | GET | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (18){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"host": "uatracer.com",
"priority": "u=1",
"referer": "https://uatracer.com/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?1",
"sec-ch-ua-platform": "\"Android\"",
"sec-fetch-dest": "script",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-e116cdffa70314feffdebe44d5c19a48-cfa83440b1e259dc-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-e116cdffa70314feffdebe44d5c19a48-34727824ea97ed2e-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-06-26 17:19:13.497 UTC | +835 ms | ES module | GET | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (19){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"priority": "u=1",
"referer": "https://uatracer.com/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?1",
"sec-ch-ua-platform": "\"Android\"",
"sec-fetch-dest": "script",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-5fc7f73d090738c704c9ef41d3c19e9a-f447c0c67bc5fa51-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-5fc7f73d090738c704c9ef41d3c19e9a-85c5e28a55a723fc-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-06-26 17:32:14.746 UTC | +782084 ms | Reporting API report (POST) | POST | Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36 |
request headers (12){
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9,bg;q=0.8",
"content-length": "1099",
"content-type": "application/reports+json",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"priority": "u=4, i",
"traceparent": "00-2dad22ec879b3810cefc620b5ca543d8-978df1b58e6af90d-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-report-body": "[{\"age\":600601,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://uatracer.com/\",\"effectiveDirective\":\"style-src-attr\",\"lineNumber\":213,\"originalPolicy\":\"style-src 'self'; report-uri /r/ZBK06nSF/csp-report; report-to ua-tracer\",\"referrer\":\"android-app://com.linkedin.android/\",\"sample\":\"\",\"sourceFile\":\"https://uatracer.com/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"user_agent\":\"Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36\"},{\"age\":600601,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://uatracer.com/\",\"effectiveDirective\":\"style-src-attr\",\"lineNumber\":721,\"originalPolicy\":\"style-src 'self'; report-uri /r/ZBK06nSF/csp-report; report-to ua-tracer\",\"referrer\":\"android-app://com.linkedin.android/\",\"sample\":\"\",\"sourceFile\":\"https://uatracer.com/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"user_agent\":\"Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.36\"}]"
}
|
||||