ua-tracer by Paul Kinlan

trace g1lSJ3aL

ua-tracer

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

← all traces

Trace g1lSJ3aL

First seen: 2026-07-12 14:38:22.757 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
2026-07-12 14:38:22.757 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=:HTkQSQ3MIAEyiDb7/RJv9hiejQIpAJDKHkyUdLsP2TsBT2enh/WKRbDjAmMF2N4vUn8w10erxALDahVSP2+pCA==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1783867102;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1783867162;nonce=\"xFT4pUqRyoEq46rveLuWqhtVm0V7wh61xqeKsbLlll3pZOcQiYg73TYsSNJ8rtNriAAhiAgPz0sWioYLJfuavA\";tag=\"web-bot-auth\"",
  "traceparent": "00-322abd6d247aa77bdc35935859971ba6-c54e1591567cf5e5-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-07-12 14:38:25.073 UTC +2316 ms CSS GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (15) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=g1lSJ3aL",
  "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": "00-581ce15781acc77fcbd491854713a743-f1b027e107e96aaa-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-581ce15781acc77fcbd491854713a743-2889f475752d7c9e-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:38:25.100 UTC +2343 ms ES module GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (16) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=g1lSJ3aL",
  "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": "00-334f0bc5f66c5de23f8e7eed7686d1bf-61a271b2b96af0e7-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-334f0bc5f66c5de23f8e7eed7686d1bf-9aa650d1e3b4615d-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:38:25.110 UTC +2353 ms iframe document GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (16) 
{
  "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=g1lSJ3aL",
  "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": "00-2e21df0aefc81bb86fe32d5552f733c6-32e5ad04beb616e3-01",
  "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",
  "x-deno-userspace-traceparent": "00-2e21df0aefc81bb86fe32d5552f733c6-8f373b382532e045-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:38:25.112 UTC +2355 ms font (HTML) GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (16) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=g1lSJ3aL",
  "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-e22efe3b938dd49bb2e87991d6ab6794-9017ff7c9e253489-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-e22efe3b938dd49bb2e87991d6ab6794-c802b0a060325254-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:38:25.113 UTC +2356 ms JS GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (15) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=g1lSJ3aL",
  "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": "00-790cbdf9eabc647723b489aa60e15540-520ade4216fa488e-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-790cbdf9eabc647723b489aa60e15540-ed0a7f628561317d-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:38:25.773 UTC +3016 ms CSS @import (nested stylesheet) GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (15) 
{
  "accept": "text/css,*/*;q=0.1",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=g1lSJ3aL",
  "host": "uatracer.com",
  "priority": "u=0",
  "referer": "https://uatracer.com/r/g1lSJ3aL/cFYFv9b2/style.css",
  "sec-fetch-dest": "style",
  "sec-fetch-mode": "no-cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-3e6cfb7bfa734ce9537e421e8ca2df7e-155cf6776b8fce04-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-3e6cfb7bfa734ce9537e421e8ca2df7e-c9c5fb8c1330101d-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:38:26.810 UTC +4053 ms CSS @font-face GET Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (16) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "cookie": "ua-tracer-trace=g1lSJ3aL",
  "host": "uatracer.com",
  "origin": "https://uatracer.com",
  "priority": "u=0",
  "referer": "https://uatracer.com/r/g1lSJ3aL/cFYFv9b2/style.css",
  "sec-fetch-dest": "font",
  "sec-fetch-mode": "cors",
  "sec-fetch-site": "same-origin",
  "traceparent": "00-dc8ab6ad3d98c25a411274fcfe8543e0-ffec52156697c656-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-dc8ab6ad3d98c25a411274fcfe8543e0-21c7405e1621f507-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:38:28.402 UTC +5645 ms client timing POST POST Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)
request headers (18) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, deflate, br, zstd",
  "content-length": "2209",
  "content-type": "application/json",
  "cookie": "ua-tracer-trace=g1lSJ3aL",
  "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-ea28be298319e2407c6bb38363ac1674-988a8be3c3dbe31b-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-ea28be298319e2407c6bb38363ac1674-f355edbc015ce876-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:43:05.346 UTC +282589 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=:6F5vJK0TX0nlJ7qnZ40W986/96mGuCDOQP5PtMqjsK04kLUA4xOJBzm6lloUfN3pQ8TIDzxZVas8sgpK7BQGAw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1783867385;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1783867445;nonce=\"C2SD080MBatpHALRXO1RrRaiHFQUMbboxKVrnm0JM_PkzVZQ6AgwTfrkQPgaWEZ_0ZOr-NaDCZBsAjDSRhKZLA\";tag=\"web-bot-auth\"",
  "traceparent": "00-d1ea667cefaf87dafd18b72d985bb3f2-c079376dfa03f4d7-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-07-12 14:43:06.670 UTC +283913 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=:Xc6T+Z0nUMtQpFuGF8hVHboCHQezNQijDJ7Y+ScuDPXz0LHHAw4VjaXZABVU7FX2Y8XGtvX4wmexmE1uAx4kAg==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1783867386;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1783867446;nonce=\"A3WFmhxSlZ59m-YXBWZ5-XnBoakJk8NeZQjya9UGbzeXzsLHR6s5vGPWXCSYuVfPvCTOJakb2Vx4UTL8J6HxHg\";tag=\"web-bot-auth\"",
  "traceparent": "00-cf1c9683b2585beb857e59e2691fcfd1-9ef830eefc8ed4b4-01",
  "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-cf1c9683b2585beb857e59e2691fcfd1-5438d8a78867651b-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:43:08.116 UTC +285359 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=:bMsm4i+bz5PHytkyN91dX/Z3gOd5tMv1Kf4rQRtLO78PawRGqkYA3CWupW8VRk8uW2Zxp/RO7cdB4q7pLVQLDA==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1783867388;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1783867448;nonce=\"LzziCf4tYe4gUtx7Phpba9cUEuYrOy4X__WaW1sGyiX7Hz-YNdzPeSlecwchkbKSFfGiiiNthTsmuKNcdERHgg\";tag=\"web-bot-auth\"",
  "traceparent": "00-02789a6cbf74311a37a90aa6fba92c17-82fadfc499886c3b-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": "00-02789a6cbf74311a37a90aa6fba92c17-f14842e9ff6c66c7-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:43:09.509 UTC +286752 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=:rxTKxTI+2PqCrzoV8ZB/BkOJcNACUehr7wIVYzvF2G88EecIaiFMYHIXueN7WJbBxe9J0T+Nrk+K4FgAIhooDw==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1783867389;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1783867449;nonce=\"m1Xi5nAK1m9rnYO8fTMcYQ9O7eETXtYyB5Bai8tsWJWOdmLAEpmhM68SZmvzhCJh0khSzPB4bmlVrIHDP-KC9A\";tag=\"web-bot-auth\"",
  "traceparent": "00-90c292946cb57047aafe143bb3fd225d-32d4026d19c1f9dd-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": "00-90c292946cb57047aafe143bb3fd225d-3d1deb834e067c9d-01",
  "x-deno-userspace-tracestate": ""
}
2026-07-12 14:43:10.623 UTC +287866 ms Open Graph image 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=:Pbu6KB+WXfCVACPDn/chLGOeZPs7RiMjgVZxukFSMi6Mlt++rNls3AwaNmvC2E4NQeMWiVoYscuoJQIdZv+BAg==:",
  "signature-agent": "\"https://ahrefs.com\"",
  "signature-input": "sig=(\"@authority\" \"signature-agent\");created=1783867390;keyid=\"e3vpiy0B6M1Wdxnizw3dqRSgpqS6SXM2qiQ6HtUwZ5g\";alg=\"ed25519\";expires=1783867450;nonce=\"Bu_G6Bt_WJoUfWew813w6yiEi3erQfy_tWkXnjzm8qSxyZwdyfoWohX4PjfcBTq6eVfEYsw8VHzwZttqwl0suQ\";tag=\"web-bot-auth\"",
  "traceparent": "00-0d9defe17da4f53bdb639115ae8f1efc-0b30b3200dcd5726-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
  "via": "HTTP/2 ord.vultr.prod.deno-cluster.net"
}
2026-07-12 21:30:37.028 UTC +24734271 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": "00-050e5556a04798fb8cc48770d2aa2eed-f8d06a28ac96d911-01",
  "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 4ms 1272ms
font.woff2 link 4ms 2590ms
preload.png link 4ms 3ms
photo.png img 4ms 3ms
module.js script 4ms 1587ms
main.js script 4ms 2950ms
prefetch.png link 6ms 2ms
iframe iframe 7ms 1900ms
import.css css 1277ms 995ms
css-bg.png css 2273ms 12ms
css-font.woff2 css 2273ms 1035ms
js-ran.gif?t=1783867107403 img 2956ms 1ms
module-ran.gif?t=1783867107405 img 2957ms 0ms