ua-tracer by Paul Kinlan

ua-tracer

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

← all traces

Trace coYjED9R

First seen: 2026-07-02 18:55:22.545 UTC
User-Agent: Bridgy Fed (https://fed.brid.gy/)
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
2026-07-02 18:55:22.545 UTC +0 ms homepage GET Bridgy Fed (https://fed.brid.gy/)
request headers (12) 
{
  "accept": "application/activity+json, application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\", text/html; charset=utf-8; q=0.5",
  "accept-encoding": "gzip, deflate",
  "connection": "keep-alive",
  "content-type": "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
  "date": "Thu, 02 Jul 2026 18:55:21 GMT",
  "digest": "SHA-256=47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=",
  "host": "uatracer.com",
  "signature": "keyId=\"https://fed.brid.gy/fed.brid.gy#key\",algorithm=\"rsa-sha256\",signature=\"St8OE6MrFYWIaZEGgYLv2MlJs2ZbhQmH7Ui9/hvrTcUxSW+7YGoiosBpsLHJ4R9Ca8cIo9n6OT+e0Ndg9whZiaorAAOugdMyS/s057nkNxz1vxnhPtOYIq4IUhmz4um7IYRLiODmSLMh2r1sSyp4qfqLBWy2rSpEiVeS09izgCdaJZmk1OUPeyLmRQPh7IkKgsrsZ4RuYgaKP/I0dORUcAQaRqcretSsXnYuXTa6VjI13LP+LdOujKHoWPUvKVGBUj1P8CzOSYrpnUs5Ekwu0KMXP4afBYPeA5tbAdRRJvWqSwAxyURfcuCRggpEXhho/ugNhDijV1OOWAXZ0phiUw==\",headers=\"date host digest (request-target)\"",
  "traceparent": "00-ce78bad5ea18173d3f643085c63bc79a-8e44608463781ab7-01",
  "tracestate": "",
  "user-agent": "Bridgy Fed (https://fed.brid.gy/)",
  "via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}