ua-tracer by Paul Kinlan

trace 0CR6asWR

ua-tracer

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

← all traces

Trace 0CR6asWR

First seen: 2026-08-23 23:11:21.856 UTC
User-Agent: Mozilla/5.0 (Linux;u;Android 4.2.2;zh-cn;) AppleWebKit/534.46 (KHTML,like Gecko) Version/5.1 Mobile Safari/10600.6.3 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)
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
2026-08-23 23:11:21.856 UTC +0 ms homepage GET Mozilla/5.0 (Linux;u;Android 4.2.2;zh-cn;) AppleWebKit/534.46 (KHTML,like Gecko) Version/5.1 Mobile Safari/10600.6.3 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)
request headers (8)
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "zh-cn,zh-tw",
  "host": "uatracer.com",
  "traceparent": "00-f0462c86e5eebd8c37dc00bd7772537b-7609362dfca0dd32-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Linux;u;Android 4.2.2;zh-cn;) AppleWebKit/534.46 (KHTML,like Gecko) Version/5.1 Mobile Safari/10600.6.3 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:14.956 UTC +53100 ms image GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-1b4dcf417cb821f4bf1a239d08268cdb-3c52c645820edff5-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:14.961 UTC +53105 ms font (HTML) GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (14)
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-102cf5ba57998181f345ca2570c3e839-b945a58526076a42-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-102cf5ba57998181f345ca2570c3e839-9185e2e26de6015b-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-23 23:12:14.973 UTC +53117 ms JS GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-910fc2ebcffe2190b0dbba34a028d760-2a608ee529d76adb-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:15.022 UTC +53166 ms preload (image) GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-23a5f081da0efc8431e9d0189ede5e18-a6ec6061885257f4-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:15.028 UTC +53172 ms ES module GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (12)
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-ebe72809c6eed99ae359722e4869a2e0-0d71954b3de2ceeb-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:15.037 UTC +53181 ms prefetch GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "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,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-9ab4bcd975ebd70539e51bf86ac799db-163ed0cb679cc80e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:15.109 UTC +53253 ms iframe document GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
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,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-a5bde01ccc627945035c9faa98426998-021430efe76656fb-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:17.600 UTC +55744 ms image inside iframe GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/r/0CR6asWR/6PNP7s61/iframe",
  "traceparent": "00-20caae9433038f6d17a129f57b17e632-23fcfeb03d45970d-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:18.130 UTC +56274 ms CSS GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-6f2891f8b0c838287c3fac782dbad4c1-b82780bcc9afe5cd-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:19.683 UTC +57827 ms CSS @import (nested stylesheet) GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/r/0CR6asWR/6PNP7s61/style.css",
  "traceparent": "00-9978918b61073c6ab1d39395e684563f-7e123971d7aee9df-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:21.756 UTC +59900 ms Reporting API report (POST) POST Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (14)
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "content-length": "0",
  "content-type": "application/json",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-011326af0f6536bccdff167da710a9d0-aad11f3ec2b191f5-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:21.761 UTC +59905 ms ES module executed GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-31f3aa1562994b8244a706d82d866f43-5596779f8917f112-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:21.854 UTC +59998 ms CSS background-image GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/r/0CR6asWR/6PNP7s61/style.css",
  "traceparent": "00-cbbd8a24841ac5dc2af242aa50a6989f-7743cb449053285c-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:21.857 UTC +60001 ms CSS @font-face GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (12)
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "referer": "https://uatracer.com/r/0CR6asWR/6PNP7s61/style.css",
  "traceparent": "00-c3397ef84a1736991122f7315b0f38d4-225ac6a6644f495b-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:21.921 UTC +60065 ms CSP violation report (POST) POST Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (14)
{
  "accept": "*/*",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "content-length": "0",
  "content-type": "application/json",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-74a2ae3f355d4b5de2f9e8547189cede-02e5de12e8549455-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-08-23 23:12:22.765 UTC +60909 ms JS executed beacon GET Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
request headers (11)
{
  "accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
  "accept-encoding": "gzip",
  "accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
  "connection": "Close",
  "cookie": "ua-tracer-trace=0CR6asWR",
  "host": "uatracer.com",
  "referer": "https://uatracer.com/",
  "traceparent": "00-ff79f3028def751e4ff018e4f8061aec-8bf60a1f7f374dfa-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}

Client-side resource waterfall

JS executed (beacon hit) but no resource-timing payload was posted (UA may block sendBeacon/fetch or strip the body).