User-Agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/119.0

first seen 2026-06-16 14:52 · last seen 2026-10-17 14:15 · JSON

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Browser / clientFirefox 119.0
Operating systemWindows 10.0
Device classdesktop
Noteinferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d141100_cbb2034c60b8_e5728521abd45
t13d221000_231e334592e8_29829a46703f1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn07enus_729fbad63700_000000000000_0000000000004
ge11nn06enus_5f95bcd9e412_000000000000_0000000000001
ge11nn06enus_bfbaf88ec000_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:105+23:0:1346:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:56+8:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:111+17:0:1346:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:112+16:0:1346:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:51+13:0:1330:mss*49,10:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1346_84
65170_2-4-8-1-3_1330_101

Country

fingerprintco-occurrences
DE · Germany5
US · United States1

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.4
AS212238 · Datacamp Limited1
AS62240 · Clouvider1

TLS supported groups

fingerprintco-occurrences
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1