ua-tracer by Paul Kinlan

trace QLHan4Yb

ua-tracer

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

← all traces

Trace QLHan4Yb

First seen: 2026-08-11 15:01:19.480 UTC
User-Agent: Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
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
2026-08-11 15:01:19.480 UTC +0 ms homepage GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "deflate, gzip, br, zstd",
  "host": "uatracer.com",
  "signature": "sig=:dresWnF2TfyW4kr9oKxa/dCAEqGRVQdj0ocNAA6CijVVTFWn+uS2hp0xmjw01jthppUq9qY7PtqIPnV0rDrOBw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786460479;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786460539;nonce=\"D0n7z6X08wZ3U9Qrlgu6gi-1c9sgnp__vrLITb3SB1iq5HN4jTQJuDrgBYsjiTiQ4z9aJvdH0eLWXkDybih0sA\";tag=\"web-bot-auth\"",
  "traceparent": "00-07c4e46e5bed7934f355675f3208c6c0-e064e196235cf4ae-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-08-11 15:01:22.104 UTC +2624 ms CSS GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (13) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=QLHan4Yb",
  "host": "uatracer.com",
  "priority": "u=0",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "style",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-f221b1011c1f8c18c0a216cbcfa79582-e15acaed14e3b89d-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-11 15:01:22.105 UTC +2625 ms font (HTML) GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (14) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=QLHan4Yb",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "priority": "u=1",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "font",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-92f6072da38b1aae1076fb90aeb3b0fa-d4c5e0f467c48d99-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-11 15:01:22.105 UTC +2625 ms ES module GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (14) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=QLHan4Yb",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "priority": "u=1",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "script",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-12d112e5183d1d3df976b520227f1267-9ed7c0537c817cf7-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-11 15:01:22.106 UTC +2626 ms JS GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (13) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=QLHan4Yb",
  "host": "uatracer.com",
  "priority": "u=1",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "script",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-ccfce0e64dda6e8c70fd9a7be646b5a8-73a376ca6c2ba677-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-11 15:01:22.106 UTC +2626 ms iframe document GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
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, deflate, br, zstd",
  "cookie": "ua-tracer-trace=QLHan4Yb",
  "host": "uatracer.com",
  "priority": "u=0, i",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "iframe",
  "sec-fetch-mode": "navigate",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-455ac38783736a7d9790e5755178dd83-6afa6a1ab276029f-01",
  "tracestate": "",
  "upgrade-insecure-requests": "1",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-11 15:01:23.134 UTC +3654 ms CSS @import (nested stylesheet) GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (13) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=QLHan4Yb",
  "host": "uatracer.com",
  "priority": "u=0",
  "referer": "https://uatracer.com/r/QLHan4Yb/BNN3nETL/style.css",
  "sec-fetch-dest": "style",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-1d4befa040fc4c41f3099946adb2dc32-c6b94c1b75ef36c8-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-11 15:01:24.523 UTC +5043 ms CSS @font-face GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (14) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=QLHan4Yb",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "priority": "u=0",
  "referer": "https://uatracer.com/r/QLHan4Yb/BNN3nETL/style.css",
  "sec-fetch-dest": "font",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-69d4939be0ae2d02ab0d9557c8f24af9-3a651f312a3dcf9c-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-11 15:01:25.876 UTC +6396 ms client timing POST POST Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (16) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "content-length": "2207",
  "content-type": "application/json",
  "cookie": "ua-tracer-trace=QLHan4Yb",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "priority": "u=4, i",
  "referer": "https://uatracer.com/",
  "sec-fetch-dest": "empty",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-7141bc4688a406af035b4cf765d52b5b-6708547204aa2330-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net"
}
2026-08-11 15:05:27.304 UTC +247824 ms JS GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (10) 
{
  "accept": "*/*",
  "accept-encoding": "deflate, gzip, br, zstd",
  "host": "uatracer.com",
  "signature": "sig=:6XL0apyoRz8aEig04doj6WSyo5lV8WY6TFf5Xh72ZbZ7EKS4kKMLWmrcqUHBiwcz6AbAoavm1CUeZ+E8NggFAA==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786460727;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786460787;nonce=\"MhQh6od4HF8tIAbniWbyMgPrvbUXRiVIg00fZsY9pkgkY-uowDTptBadAHAibmrcI0zgFUlwl1TDjZfnA9quTA\";tag=\"web-bot-auth\"",
  "traceparent": "00-894d7e17589ad6e47cc305d48b2acfd8-89b3f0f52c03485d-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-08-11 15:05:28.656 UTC +249176 ms ES module GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "deflate, gzip, br, zstd",
  "host": "uatracer.com",
  "signature": "sig=:3NJ/4eU1Nby37zts1a11iXqvSP+4naHxmBaZqOSjSGJr4UY8y0Q9oleAAlWyOUcKMDjN4x45lKChXlnNmXuuCA==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786460728;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786460788;nonce=\"R5L7xwcdTEYRBLxviNbsm7egGCS54afn6fsP7AOsS27v1Ws0Tc0TDtbdO6hHZEwoHghy_sBRCbpnMx-c3zgt2w\";tag=\"web-bot-auth\"",
  "traceparent": "00-b521e05abe3410bde224727d5e0698b3-a3a9dc20d795884b-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-b521e05abe3410bde224727d5e0698b3-09c0f86420d4ac10-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-11 15:05:29.778 UTC +250298 ms Open Graph image GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "deflate, gzip, br, zstd",
  "host": "uatracer.com",
  "signature": "sig=:2Acg1v5F1hglqrAJJUR9dOf6topFclvjTHKirg5kheZWq6CSI1WnVLFupeF/GI87srKh9UfZW+OyIPJFtuTWCw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786460729;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786460789;nonce=\"cdX-79C3O6280W3VrKhVmkQ9up2iqhhI0yqnXzkSFAsp1pnhhjTSJn7UtdL-AoSM6myo6A3Y6KTi5Rz7LOTSug\";tag=\"web-bot-auth\"",
  "traceparent": "00-d29af18bff4af7d0295daad07be8966f-631f996689a915a0-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-d29af18bff4af7d0295daad07be8966f-91d3d8bd25617ed8-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-11 15:05:30.904 UTC +251424 ms image GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "deflate, gzip, br, zstd",
  "host": "uatracer.com",
  "signature": "sig=:mawzsZeIwOvK2g4UrO6odubdeax0yG3OJWCzayhwpE0O0/1o5zM9Ludx1BSWxBPD3vfFpKyyPUhuu0s7qrJxCQ==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786460730;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786460790;nonce=\"1VTDDO98Hz-et3U9sYcF8RmqPIChPRr_1UA-u3iM3bZXlzABkUu5bUo7s4hOfscpOR-eP1FyDfpIOYvHNneDCA\";tag=\"web-bot-auth\"",
  "traceparent": "00-83f618c00175430290ba5075f99c8a73-dbd3812e2eb425b6-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-83f618c00175430290ba5075f99c8a73-ab8e76f73428046b-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-11 15:05:32.395 UTC +252915 ms CSS GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (12) 
{
  "accept": "*/*",
  "accept-encoding": "deflate, gzip, br, zstd",
  "host": "uatracer.com",
  "signature": "sig=:PzLaaEdnArndgx4jzZrBQm2SaiSPzYlbr6HXY2nsHjHxeMO0o2skftwNR0+FnpDDEOD1/yUdy5ycHHlHc02+Dw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1786460732;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1786460792;nonce=\"MEOdURJ1I492gEVT3XvXSmhyGhIijeXmdCCH65TJHksL1yZEjgwt31lV_ijcGDILzg-SxeelRZMjXl-RFUT6AA\";tag=\"web-bot-auth\"",
  "traceparent": "00-a05665611bfc7e392a019a7e8f8d9e72-672de6a2c49f1b49-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-a05665611bfc7e392a019a7e8f8d9e72-723de5992fcb8af8-01",
  "x-deno-userspace-tracestate": ""
}
2026-08-11 16:22:04.681 UTC +4845201 ms font (HTML) 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": "00-3c40ad5e152345fb545a5ce918f58b61-4ac9343e90c1071e-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"
}
2026-08-11 16:31:57.387 UTC +5437907 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 (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": "00-67cb534455aba7c71a4514f5e7bb6b7f-fde08d758cee73f2-01",
  "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"
}
2026-08-11 16:43:28.712 UTC +6129232 ms CSS @font-face 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-a6480942cf3c49130a7a6bd87e1618df-a04a6f3d9bf57c6a-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"
}

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 3ms 1656ms
preload.png link 5ms 3ms
photo.png img 5ms 3ms
font.woff2 link 5ms 1338ms
main.js script 5ms 2698ms
module.js script 5ms 2366ms
prefetch.png link 6ms 2ms
iframe iframe 7ms 2010ms
import.css css 1660ms 1368ms
css-bg.png css 3029ms 10ms
css-font.woff2 css 3029ms 738ms
js-ran.gif?t=1786460484465 img 3039ms 1ms
module-ran.gif?t=1786460484466 img 3040ms 1ms