ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace K1gJUZns

First seen: 2026-07-02 01:19:41.445 UTC
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 15_7_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Safari/605.1.15

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
2026-07-02 01:19:41.445 UTC +0 ms homepage GET Mozilla/5.0 (Macintosh; Intel Mac OS X 15_7_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Safari/605.1.15
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "host": "uatracer.com",
  "traceparent": "00-1be0e2f04ae2265d5e3a70c07696daf3-b59764549b9a388f-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 15_7_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Safari/605.1.15",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-02 01:19:44.770 UTC +3325 ms ES module GET Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "host": "uatracer.com",
  "traceparent": "00-61b229626c1f7999e57eb2397aa32ea5-d693c1cc8d037be2-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-02 01:19:52.852 UTC +11407 ms JS GET Mozilla/5.0 (Macintosh; Intel Mac OS X 15.7; rv:149.0) Gecko/20100101 Firefox/149.0
request headers (7) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "host": "uatracer.com",
  "traceparent": "00-ffbbe943635128c24acb7ef4a10a61d6-557b3d170fb08280-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 15.7; rv:149.0) Gecko/20100101 Firefox/149.0",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
2026-07-02 01:19:55.156 UTC +13711 ms web app manifest GET Mozilla/5.0 (Macintosh; Intel Mac OS X 15_7_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Safari/605.1.15
request headers (9) 
{
  "accept": "*/*",
  "accept-encoding": "gzip, br, deflate",
  "host": "uatracer.com",
  "traceparent": "00-62a1359c707d3ead614181e0857feb54-b6df1f4feb1408a9-01",
  "tracestate": "",
  "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 15_7_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Safari/605.1.15",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
  "x-deno-userspace-traceparent": "00-62a1359c707d3ead614181e0857feb54-1cbc88b742b516aa-01",
  "x-deno-userspace-tracestate": ""
}