ua-tracer by Paul Kinlan

trace bVhRB5dr

ua-tracer

what does a user agent actually fetch, follow & run?

← all traces

Trace bVhRB5dr

First seen: 2026-07-14 03:12:00.786 UTC
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; 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.

ReceivedΔKindMethodUser-Agent
2026-07-14 03:12:00.786 UTC +0 ms homepage GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "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": "uatracer.com",
  "priority": "u=0, i",
  "sec-fetch-dest": "document",
  "sec-fetch-mode": "navigate",
  "sec-fetch-site": "none",
  "sec-fetch-user": "?1",
  "te": "trailers",
  "traceparent": "00-3fdb30c6030c89db12db58a41f6d1ba8-120e834edcafaf9d-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:03.007 UTC +2221 ms CSS GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-7db5be44ac639ce24ee770bd79cbd644-07227ea797ba8839-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:03.012 UTC +2226 ms preload (image) GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "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": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-1de215097f248dcb93a3d180001d274d-c57bbab91085689e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:03.012 UTC +2226 ms font (HTML) GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "accept": "application/font-woff2;q=1.0,application/font-woff;q=0.9,*/*;q=0.8",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-5ddb0d025b0681bf070dca796cb9de29-9d1a33a45d9a3a82-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:03.016 UTC +2230 ms prefetch GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (16) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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": "empty",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "sec-purpose": "prefetch",
  "te": "trailers",
  "traceparent": "00-3bc894d1daf0ad3f5791ef20f649b175-56b6d07741081ef6-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:03.020 UTC +2234 ms Reporting API report (POST) POST Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (19) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "content-length": "2675",
  "content-type": "application/reports+json",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-25f89d648c7c1d9405c90bb55fd00b8f-929b6142c7bd4c7d-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; 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 (Windows NT 10.0; Win64; x64; 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/bVhRB5dr/YclRsy7C/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 (Windows NT 10.0; Win64; x64; 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/bVhRB5dr/YclRsy7C/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 (Windows NT 10.0; Win64; x64; 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/bVhRB5dr/YclRsy7C/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]"
}
2026-07-14 03:12:03.026 UTC +2240 ms image GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "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": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-2ad315103da9e97a12651d48401c4d08-4a37d464ed279033-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:03.028 UTC +2242 ms JS GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (14) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-55f49d6cc5d0ea229e76ede3ce44a0c1-f8367626fcc6cb4c-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:03.030 UTC +2244 ms ES module GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (14) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-ad5eb02e114d68fc03379c9229f41892-dc9827e3f5d5d9d7-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:03.041 UTC +2255 ms iframe document GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (16) 
{
  "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",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-59258058076044136bc11eeadc4e6d2a-50e25437ffd5197e-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:03.061 UTC +2275 ms Reporting API report (POST) POST Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (19) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "content-length": "893",
  "content-type": "application/reports+json",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-2d731f8f3abce2a987260f24a04fb512-155fc27aae6999ec-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; 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 (Windows NT 10.0; Win64; x64; 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/bVhRB5dr/YclRsy7C/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]"
}
2026-07-14 03:12:03.768 UTC +2982 ms CSS @import (nested stylesheet) GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "host": "uatracer.com",
  "priority": "u=2",
  "referer": "https://uatracer.com/r/bVhRB5dr/YclRsy7C/style.css",
  "sec-fetch-dest": "style",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "te": "trailers",
  "traceparent": "00-ff1cba57467f2c8214aa564de7e439d7-0a71cbac955a0076-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:05.814 UTC +5028 ms CSS background-image GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "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": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "host": "uatracer.com",
  "priority": "u=4, i",
  "referer": "https://uatracer.com/r/bVhRB5dr/YclRsy7C/style.css",
  "sec-fetch-dest": "image",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "te": "trailers",
  "traceparent": "00-a02074f0303b20e764135a1e81dc4ef6-a9e2c31cfe0b32f9-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:05.827 UTC +5041 ms CSS @font-face GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (14) 
{
  "accept": "application/font-woff2;q=1.0,application/font-woff;q=0.9,*/*;q=0.8",
  "accept-encoding": "identity",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/r/bVhRB5dr/YclRsy7C/style.css",
  "sec-fetch-dest": "font",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "te": "trailers",
  "traceparent": "00-cac76264fcb66b87213f416a986b1853-93ae180bd86e175b-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:06.246 UTC +5460 ms JS executed beacon GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
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  "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 (Windows NT 10.0; Win64; x64; 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/bVhRB5dr/YclRsy7C/csp-report; report-to ua-tracer\",\n \"sourceFile\": \"https://uatracer.com/r/bVhRB5dr/YclRsy7C/main.js\",\n \"sample\": null,\n \"disposition\": \"report\",\n \"statusCode\": 200,\n \"lineNumber\": 45,\n \"columnNumber\": 11\n}\n\n }\n]"
}
2026-07-14 03:12:43.174 UTC +42388 ms ES module executed GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "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": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-d535924e0a7924fc47a3fb2979846e45-e06d8cf6a33d0b45-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:43.222 UTC +42436 ms image inside iframe GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "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": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "host": "uatracer.com",
  "priority": "u=5, i",
  "referer": "https://uatracer.com/r/bVhRB5dr/YclRsy7C/iframe",
  "sec-fetch-dest": "image",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "te": "trailers",
  "traceparent": "00-dbff01fe23cb378427a1bdf51394ae25-2c0172041e88f0a6-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:43.252 UTC +42466 ms apple-touch-icon GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "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": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-28ae5d36c7482bbcff8838eea552907a-5155a9e961c700d7-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:43.273 UTC +42487 ms favicon GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (15) 
{
  "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": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-cc8fb0c0c762a1821a898e514e2f8d49-bc19a17223314b1b-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:46.089 UTC +45303 ms prefetch GET Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (16) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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": "empty",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "sec-purpose": "prefetch",
  "te": "trailers",
  "traceparent": "00-b2bb8737246b75c18efd6f2b405a326a-3375f4522acaebbe-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 03:12:46.706 UTC +45920 ms client timing POST POST Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0
request headers (18) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "accept-language": "en-US,en;q=0.9",
  "content-length": "2564",
  "content-type": "application/json",
  "cookie": "ua-tracer-trace=bVhRB5dr",
  "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",
  "te": "trailers",
  "traceparent": "00-9e56101f431a1c3eebbde680b8abe85a-9ead4a335a493848-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:152.0) Gecko/20100101 Firefox/152.0",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-07-14 05:27:29.484 UTC +8128698 ms iframe document GET Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1
request headers (14) 
{
  "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",
  "accept-language": "zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7",
  "cache-control": "no-cache",
  "connection": "keep-alive, close",
  "host": "uatracer.com",
  "pragma": "no-cache",
  "traceparent": "00-ea209e1f7da28da9262f980fd16ab2b4-207a946ca74988df-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-ea209e1f7da28da9262f980fd16ab2b4-1b80c75bcaa3a033-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-14 05:36:52.464 UTC +8691678 ms CSP violation report (POST) GET Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1
request headers (12) 
{
  "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",
  "accept-language": "zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7",
  "cache-control": "no-cache",
  "connection": "keep-alive, close",
  "host": "uatracer.com",
  "pragma": "no-cache",
  "traceparent": "00-42b604134f5e12f28b3a752be473c992-b433a3826ce142b3-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1",
  "via": "HTTP/1.1 ord.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.

ResourceInitiatorStartDurationTimeline
style.css link 3284ms 762ms
preload.png link 3284ms 1670ms
font.woff2 other 3284ms 2435ms
prefetch.png other 3300ms 1ms
favicon.ico other 3303ms 4479ms
apple-touch-icon.png other 3303ms 4786ms
photo.png img 3313ms 996ms
module.js script 3313ms 3173ms
main.js script 3313ms 3215ms
iframe iframe 3318ms 3294ms
import.css css 4047ms 2033ms
css-bg.png css 6087ms 709ms
css-font.woff2 other 6101ms 1068ms
js-ran.gif?t=1783998723902 img 6533ms 2696ms
csp-report other 6534ms 1966ms
report other 6534ms 2361ms
module-ran.gif?t=1783998723905 img 6534ms 3137ms