ua-tracer
by Paul Kinlan
ua-tracer
what does a user agent actually fetch, follow & run?
Trace F8n1WYHQ
First seen: 2026-06-22 14:31:43.695 UTC
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15
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 14:31:43.695 UTC | +0 ms | homepage | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 |
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": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=0, i",
"sec-fetch-dest": "document",
"sec-fetch-mode": "navigate",
"sec-fetch-site": "none",
"traceparent": "00-6ecca661e0d1d49b05b11d7d3a375d54-bd1eba25c27d3e30-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 14:31:44.643 UTC | +948 ms | Reporting API report (POST) | POST | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 |
request headers (18){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9",
"cache-control": "max-age=0",
"content-length": "448",
"content-type": "application/csp-report",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"origin": "null",
"priority": "u=7, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-ad170a905a4574509ea856efdc94570a-0384a4edbdb8f4b0-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-report-body": "{\"type\":\"csp-violation\",\"url\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"body\":{\"documentURL\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"disposition\":\"report\",\"referrer\":\"\",\"effectiveDirective\":\"style-src-elem\",\"blockedURL\":\"inline\",\"originalPolicy\":\"style-src 'self'; report-uri /r/F8n1WYHQ/csp-report; report-to ua-tracer\",\"statusCode\":200,\"sample\":\"\",\"sourceFile\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"lineNumber\":8,\"columnNumber\":1}}"
}
|
||||
| 2026-06-22 14:31:44.644 UTC | +949 ms | CSS | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 |
request headers (13){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=1, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-fetch-dest": "style",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-18184149d8b01d3561d32f6e68dbc5e2-8d0ddff851cea9a3-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 14:31:44.644 UTC | +949 ms | font (HTML) | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 |
request headers (14){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"origin": "https://ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=3, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-fetch-dest": "font",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-e57d8bb5257b574af7424607d067c2cd-32b6a5ab8d4e375d-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 14:31:44.659 UTC | +964 ms | JS | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 |
request headers (13){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=1, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-fetch-dest": "script",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-87b7d1a7d70afaec7c7ce61cfa16a850-a854d8c4b6f3c606-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 14:31:44.663 UTC | +968 ms | ES module | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 |
request headers (14){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"origin": "https://ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=1, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-fetch-dest": "script",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-72f262fa35345f72d1f45601dc44e959-11fbb60c7c5ddf0b-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 14:31:44.663 UTC | +968 ms | iframe document | GET | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 |
request headers (13){
"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": "ua-tracer.paulkinlan-ea.deno.net",
"priority": "u=0, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-fetch-dest": "iframe",
"sec-fetch-mode": "navigate",
"sec-fetch-site": "same-origin",
"traceparent": "00-d44d20506c7fb2be0be42ced6f694093-48b118303309d48c-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-06-22 14:31:44.999 UTC | +1304 ms | Reporting API report (POST) | POST | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 |
request headers (18){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9",
"cache-control": "max-age=0",
"content-length": "450",
"content-type": "application/csp-report",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"origin": "null",
"priority": "u=7, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-97d57c72aa3a58af1352490eee5cd97f-163b110fbfdbd45f-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-report-body": "{\"type\":\"csp-violation\",\"url\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"body\":{\"documentURL\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"disposition\":\"report\",\"referrer\":\"\",\"effectiveDirective\":\"style-src-attr\",\"blockedURL\":\"inline\",\"originalPolicy\":\"style-src 'self'; report-uri /r/F8n1WYHQ/csp-report; report-to ua-tracer\",\"statusCode\":200,\"sample\":\"\",\"sourceFile\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"lineNumber\":770,\"columnNumber\":1}}"
}
|
||||
| 2026-06-22 14:31:45.003 UTC | +1308 ms | Reporting API report (POST) | POST | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15 |
request headers (18){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "en-US,en;q=0.9",
"cache-control": "max-age=0",
"content-length": "450",
"content-type": "application/csp-report",
"host": "ua-tracer.paulkinlan-ea.deno.net",
"origin": "null",
"priority": "u=7, i",
"referer": "https://ua-tracer.paulkinlan-ea.deno.net/",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"traceparent": "00-e1b6b683bcef23b635ef517737ac92c9-4e60f33633357263-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-report-body": "{\"type\":\"csp-violation\",\"url\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"body\":{\"documentURL\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"disposition\":\"report\",\"referrer\":\"\",\"effectiveDirective\":\"style-src-attr\",\"blockedURL\":\"inline\",\"originalPolicy\":\"style-src 'self'; report-uri /r/F8n1WYHQ/csp-report; report-to ua-tracer\",\"statusCode\":200,\"sample\":\"\",\"sourceFile\":\"https://ua-tracer.paulkinlan-ea.deno.net/\",\"lineNumber\":212,\"columnNumber\":1}}"
}
|
||||