ua-tracer
by Paul Kinlan
ua-tracer
what does a user agent actually fetch, follow & run?
Trace Vj6WASXz
First seen: 2026-06-22 13:07:31.233 UTC
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 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 |
|---|---|---|---|---|
| 2026-06-22 13:07:31.233 UTC | +0 ms | homepage | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 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-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=0, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/traces?uap=2",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "document",
"sec-fetch-mode": "navigate",
"sec-fetch-site": "same-origin",
"sec-fetch-user": "?1",
"traceparent": "00-4c2312174188eaecb308d5a6325030b5-a94cd36f09bb180f-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:07:31.645 UTC | +412 ms | CSS | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (17){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=0",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "style",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-e964fbe3ec6dcd69acd400b8798a1861-d1ca15821cef233c-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:07:31.648 UTC | +415 ms | font (HTML) | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (18){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"origin": "https://ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=1",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "font",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-438cf6f3aa744acb05e44e0341ff4105-9ce4c89a70ffc5ee-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:07:31.649 UTC | +416 ms | preload (image) | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (17){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-d604e028a96e068f42a9108de633624d-efeb32b04c7576a0-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:07:31.653 UTC | +420 ms | web app manifest | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (16){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=2",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "manifest",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-bc799aec574a6c22ca410495b6b7cbf5-1d47d958f4e21108-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:07:31.653 UTC | +420 ms | prefetch | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (18){
"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-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=4, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-purpose": "prefetch",
"traceparent": "00-952f001828f0d0e3cace69630ff86d02-5b5e45ff9f71a342-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:07:31.668 UTC | +435 ms | ES module | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (18){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"origin": "https://ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=1",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "script",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-bb57580d2c903675ad84c4c1bea62704-081ec48fa5c09f6c-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:07:31.669 UTC | +436 ms | image | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (17){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-15c2dfd657be38d432cfe0d99e4c1088-1a6fc7fa3d4ec2e8-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:07:31.672 UTC | +439 ms | JS | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (17){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=1",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "script",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-157ff2142e9e9774feeed4c6cf2081f7-533b3537c1947b98-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:07:32.083 UTC | +850 ms | CSS @import (nested stylesheet) | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (17){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=0",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/r/Vj6WASXz/style.css",
"sec-ch-ua": "\"Google Chrome\";v=\"149\", \"Chromium\";v=\"149\", \"Not)A;Brand\";v=\"24\"",
"sec-ch-ua-mobile": "?0",
"sec-ch-ua-platform": "\"macOS\"",
"sec-fetch-dest": "style",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-cb7b5fb96883d80d8d508af0981310f6-7ef242920453a423-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 13:08:28.481 UTC | +57248 ms | Reporting API report (POST) | POST | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 |
request headers (13){
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-GB,en-US;q=0.9,en;q=0.8,cy;q=0.7,ja;q=0.6",
"content-length": "1895",
"content-type": "application/reports+json",
"cookie": "_ga=GA1.3.26732159.1773269736; _ga_ETP7HCLFWK=GS2.1.s1773269736$o1$g0$t1773269740$j56$l0$h0",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"origin": "https://ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=4, i",
"traceparent": "00-e32c6aef7198e6b28e26761b042f61e2-baf7ba11698e2577-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-report-body": "[{\"age\":56827,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"effectiveDirective\":\"style-src-elem\",\"lineNumber\":8,\"originalPolicy\":\"style-src 'self'; report-uri /r/Vj6WASXz/csp-report; report-to ua-tracer\",\"referrer\":\"https://ua-tracer.paulkinlan-ea.deno.net/traces?uap=2\",\"sample\":\"\",\"sourceFile\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"user_agent\":\"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36\"},{\"age\":56818,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"effectiveDirective\":\"style-src-attr\",\"lineNumber\":768,\"originalPolicy\":\"style-src 'self'; report-uri /r/Vj6WASXz/csp-report; report-to ua-tracer\",\"referrer\":\"https://ua-tracer.paulkinlan-ea.deno.net/traces?uap=2\",\"sample\":\"\",\"sourceFile\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"user_agent\":\"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36\"},{\"age\":56826,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"effectiveDirective\":\"style-src-attr\",\"lineNumber\":256,\"originalPolicy\":\"style-src 'self'; report-uri /r/Vj6WASXz/csp-report; report-to ua-tracer\",\"referrer\":\"https://ua-tracer.paulkinlan-ea.deno.net/traces?uap=2\",\"sample\":\"\",\"sourceFile\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"user_agent\":\"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36\"}]"
}
|
||||