ua-tracer
by Paul Kinlan
trace MS23U1ef
what does a user agent actually fetch, follow & run?
Trace MS23U1ef
First seen: 2026-07-13 11:31:59.143 UTC
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0
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 |
|---|---|---|---|---|
| 2026-07-13 11:31:59.143 UTC | +0 ms | homepage | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=0, i",
"sec-fetch-dest": "document",
"sec-fetch-mode": "navigate",
"sec-fetch-site": "none",
"sec-fetch-user": "?1",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-db598a6e5d85398b9c8c06dd6ce36ddc-029ab7a129be8fa9-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:01.092 UTC | +1949 ms | font (HTML) | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "application/font-woff2;q=1.0,application/font-woff;q=0.9,*/*;q=0.8",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=2",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "font",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-04cd57fd64e03911cb23354729ce166e-2461b9e00bfaf85a-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:01.093 UTC | +1950 ms | CSS | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=2",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "style",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-3c919e28f32db570d85b4776e188c81c-575d477343757f11-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:01.095 UTC | +1952 ms | preload (image) | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=5, i",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-cfe79f4b441da1019d260019fe4b378f-84bfdc81aecd1cf2-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:01.097 UTC | +1954 ms | JS | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (16){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "script",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-14141cd3f3f29ba0dd75c6db3f96b791-3993d8280d1f2ad2-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:01.097 UTC | +1954 ms | ES module | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (16){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "script",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-e7f5269fa2bce8d202cc90c59fe82b62-bdb53e49fcd471df-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:01.099 UTC | +1956 ms | image | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=5, i",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-137a26c8ea77fe2df67b4f90ba8398a4-befc6806b8a8659e-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:01.140 UTC | +1997 ms | iframe document | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (18){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=4",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "iframe",
"sec-fetch-mode": "navigate",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-6a01b78076743400b4741590ea04abd9-02cd107f156b88cd-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:01.145 UTC | +2002 ms | Reporting API report (POST) | POST | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (21){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"content-length": "4340",
"content-type": "application/reports+json",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"priority": "u=4",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-3ce7b53f87e437e8605feb5a1c49db44-3a4fb4f108d093cc-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-report-body": "[\n {\n \"age\": 8,\n \"type\": \"csp-violation\",\n \"url\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"user_agent\": \"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0\",\n \"body\": {\n \"documentURL\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"blockedURL\": \"inline\",\n \"referrer\": null,\n \"effectiveDirective\": \"style-src-elem\",\n \"originalPolicy\": \"style-src 'self'; report-uri https://uatracer.com/r/MS23U1ef/O3f62nuf/csp-report; report-to ua-tracer\",\n \"sourceFile\": \"moz-extension\",\n \"sample\": null,\n \"disposition\": \"report\",\n \"statusCode\": 200,\n \"lineNumber\": 89,\n \"columnNumber\": 443\n}\n\n },\n {\n \"age\": 6,\n \"type\": \"csp-violation\",\n \"url\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"user_agent\": \"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0\",\n \"body\": {\n \"documentURL\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"blockedURL\": \"inline\",\n \"referrer\": null,\n \"effectiveDirective\": \"style-src-elem\",\n \"originalPolicy\": \"style-src 'self'; report-uri https://uatracer.com/r/MS23U1ef/O3f62nuf/csp-report; report-to ua-tracer\",\n \"sourceFile\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"sample\": null,\n \"disposition\": \"report\",\n \"statusCode\": 200,\n \"lineNumber\": 9,\n \"columnNumber\": 1\n}\n\n },\n {\n \"age\": 4,\n \"type\": \"csp-violation\",\n \"url\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"user_agent\": \"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0\",\n \"body\": {\n \"documentURL\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"blockedURL\": \"inline\",\n \"referrer\": null,\n \"effectiveDirective\": \"style-src-attr\",\n \"originalPolicy\": \"style-src 'self'; report-uri https://uatracer.com/r/MS23U1ef/O3f62nuf/csp-report; report-to ua-tracer\",\n \"sourceFile\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"sample\": null,\n \"disposition\": \"report\",\n \"statusCode\": 200,\n \"lineNumber\": 0,\n \"columnNumber\": 1\n}\n\n },\n {\n \"age\": 4,\n \"type\": \"csp-violation\",\n \"url\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"user_agent\": \"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0\",\n \"body\": {\n \"documentURL\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"blockedURL\": \"inline\",\n \"referrer\": null,\n \"effectiveDirective\": \"style-src-attr\",\n \"originalPolicy\": \"style-src 'self'; report-uri https://uatracer.com/r/MS23U1ef/O3f62nuf/csp-report; report-to ua-tracer\",\n \"sourceFile\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"sample\": null,\n \"disposition\": \"report\",\n \"statusCode\": 200,\n \"lineNumber\": 0,\n \"columnNumber\": 1\n}\n\n },\n {\n \"age\": 4,\n \"type\": \"csp-violation\",\n \"url\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"user_agent\": \"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0\",\n \"body\": {\n \"documentURL\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"blockedURL\": \"inline\",\n \"referrer\": null,\n \"effectiveDirective\": \"style-src-attr\",\n \"originalPolicy\": \"style-src 'se"
}
|
||||
| 2026-07-13 11:32:03.172 UTC | +4029 ms | CSS @import (nested stylesheet) | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=2",
"referer": "https://uatracer.com/r/MS23U1ef/O3f62nuf/style.css",
"sec-fetch-dest": "style",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-202de1fdbcdff4669346c0451740460e-82f6f0dd9c7c26bf-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:03.885 UTC | +4742 ms | CSS background-image | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=4, i",
"referer": "https://uatracer.com/r/MS23U1ef/O3f62nuf/style.css",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-2e2de1b836f673e03e5c9da41dc3b137-2545123dd8572267-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:03.927 UTC | +4784 ms | CSS @font-face | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (16){
"accept": "application/font-woff2;q=1.0,application/font-woff;q=0.9,*/*;q=0.8",
"accept-encoding": "identity",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/MS23U1ef/O3f62nuf/style.css",
"sec-fetch-dest": "font",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-e0d8144ab0af7e77dadd051f7136488d-78dc31dd6c67765e-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:03.929 UTC | +4786 ms | JS executed beacon | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=5, i",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-762bb449d2182677fe8e24841ee99d20-ef02fc37c1613e89-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-13 11:32:03.929 UTC | +4786 ms | ES module executed | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
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| 2026-07-13 11:32:03.933 UTC | +4790 ms | CSP violation report (POST) | POST | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-13 11:32:03.953 UTC | +4810 ms | Reporting API report (POST) | POST | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-13 11:32:03.957 UTC | +4814 ms | Reporting API report (POST) | POST | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-13 11:32:04.339 UTC | +5196 ms | favicon | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-13 11:32:04.380 UTC | +5237 ms | apple-touch-icon | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-13 11:32:04.393 UTC | +5250 ms | image inside iframe | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-13 11:32:07.996 UTC | +8853 ms | client timing POST | POST | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-14 10:41:30.618 UTC | +83371475 ms | font (HTML) | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-14 10:41:30.622 UTC | +83371479 ms | CSS | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-14 10:41:30.624 UTC | +83371481 ms | JS | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-14 10:41:30.628 UTC | +83371485 ms | ES module | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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| 2026-07-14 10:41:30.634 UTC | +83371491 ms | preload (image) | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
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"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-14 10:41:33.284 UTC | +83374141 ms | Reporting API report (POST) | POST | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (21){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"content-length": "818",
"content-type": "application/reports+json",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"priority": "u=4",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-962a33f4a6a13a6d9281144e05701ff5-caf9b7ea3a7d3007-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-report-body": "[\n {\n \"age\": 4,\n \"type\": \"csp-violation\",\n \"url\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"user_agent\": \"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0\",\n \"body\": {\n \"documentURL\": \"https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly\",\n \"blockedURL\": \"inline\",\n \"referrer\": null,\n \"effectiveDirective\": \"style-src-attr\",\n \"originalPolicy\": \"style-src 'self'; report-uri https://uatracer.com/r/MS23U1ef/O3f62nuf/csp-report; report-to ua-tracer\",\n \"sourceFile\": \"https://uatracer.com/r/MS23U1ef/O3f62nuf/main.js\",\n \"sample\": null,\n \"disposition\": \"report\",\n \"statusCode\": 200,\n \"lineNumber\": 45,\n \"columnNumber\": 11\n}\n\n }\n]"
}
|
||||
| 2026-07-14 10:41:33.304 UTC | +83374161 ms | ES module executed | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=5, i",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-d30163d893e63cf484ee1227f0aa33af-6141f6019910a1ee-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-14 10:41:34.030 UTC | +83374887 ms | apple-touch-icon | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=6",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-7d879f1671703a742a4e8251b57084c8-f0cf582bd27f88d4-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-14 10:41:34.034 UTC | +83374891 ms | favicon | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=6",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-b63e99c8f210d3c78a821f4342afaa53-f27b1dbf2f838feb-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-14 10:41:34.489 UTC | +83375346 ms | CSS background-image | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (17){
"accept": "image/avif,image/webp,image/png,image/svg+xml,image/*;q=0.8,*/*;q=0.5",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"priority": "u=4, i",
"referer": "https://uatracer.com/r/MS23U1ef/O3f62nuf/style.css",
"sec-fetch-dest": "image",
"sec-fetch-mode": "no-cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-1baedd522b06cfaf4e8c1518aef66096-b399dfe7485dfb36-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-14 10:41:34.495 UTC | +83375352 ms | CSS @font-face | GET | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (16){
"accept": "application/font-woff2;q=1.0,application/font-woff;q=0.9,*/*;q=0.8",
"accept-encoding": "identity",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/MS23U1ef/O3f62nuf/style.css",
"sec-fetch-dest": "font",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-f5e2e1b37ca562af2a9dce6148bcf65d-cf71fc6060294a3c-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-14 10:41:38.379 UTC | +83379236 ms | client timing POST | POST | Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0 |
request headers (20){
"accept": "*/*",
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "de,en-US;q=0.9,en;q=0.8",
"content-length": "2561",
"content-type": "application/json",
"cookie": "ua-tracer-trace=MS23U1ef",
"dnt": "1",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"priority": "u=6",
"referer": "https://uatracer.com/?utm_source=stefanjudis&utm_medium=email&utm_campaign=u1f9e2-web-weekly-196-ecmascript-2026-and-wiggly",
"sec-fetch-dest": "empty",
"sec-fetch-mode": "cors",
"sec-fetch-site": "same-origin",
"sec-gpc": "1",
"te": "trailers",
"traceparent": "00-5dc333ab7948e5899cd9d14417c0a0b1-087a32040061ca2a-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
|
||||
Client-side resource waterfall
Reported by performance.getEntriesByType('resource') after JS ran in the UA. This proves a real
browser-grade engine, not just a downloader.
| Resource | Initiator | Start | Duration | Timeline |
|---|---|---|---|---|
| other | 2761ms | 683ms | ||
| link | 2761ms | 2110ms | ||
| link | 2762ms | 2528ms | ||
| script | 2788ms | 992ms | ||
| img | 2788ms | 1349ms | ||
| script | 2788ms | 1691ms | ||
| iframe | 2831ms | 3261ms | ||
| other | 2835ms | 5545ms | ||
| other | 2835ms | 6358ms | ||
| css | 4873ms | 696ms | ||
| css | 5586ms | 1005ms | ||
| other | 5627ms | 1979ms | ||
| other | 5628ms | 675ms | ||
| img | 5628ms | 1280ms | ||
| img | 5628ms | 1613ms | ||
| other | 5630ms | 3121ms |