User-Agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0

first seen 2026-06-14 01:16 · last seen 2026-08-29 10:50 · 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 128.0
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
t13d1516h2_8daaf6152771_33a51b5ad3c516
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.6
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.4
t12d130600_2d7513195f68_e51b7354d87f2
t13d1812h1_85036bcba153_d41ae481755e2
t12d210700_76e208dd3e22_f28add8e7af01
t12d1814h2_29a2cd9e9f10_d267a5f792d41
t13d3612h1_018971650b2c_58ed7828516f1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn10enus_d353d425b0bb_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 152.0.1.The fingerprint page shows the full measured match list. More on the catalog.6
ge11nr09enus_584cf71d8dfa_000000000000_0000000000004
ge11nr040000_e1d2031bdfea_000000000000_0000000000002
ge11nn09enus_584cf71d8dfa_000000000000_0000000000002
ge11nn050000_3658ef221638_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.21.4, wget 1.21.3, wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.2
ge20nn11ruru_3901d4197baf_000000000000_0000000000002
ge20nn11dede_3901d4197baf_000000000000_0000000000002
ge20nn11zhcn_3901d4197baf_000000000000_0000000000002
ge20nn11ptbr_3901d4197baf_000000000000_0000000000002
ge20nn11frfr_3901d4197baf_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|0|m,p,a,s16
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,p,a,s3
1:65536;4:131072;5:16384|12517377|3:0:0:201,5:0:0:101,7:0:0:1,9:0:7:1,11:0:3:1,13:0:0:241|m,p,a,s1
1:65536;2:0;4:6291456;6:262144|15663105|0|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
4:47+17:0:1460:65535,3:mss,sok,ts,nop,ws:df,id+:013
4:47+17:0:1460:1152,0:mss,sok,ts,nop,ws:df,id+:07
6:53+11:0:1440:mss*30,9:mss,nop,ws:flow:02
4:119+9:0:1380:mss*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:47+17:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:01
6:43+21:0:1440:mss*30,11:mss,sok,ts,nop,ws:flow:01
6:42+22:0:1440:mss*30,11:mss,sok,ts,nop,ws:flow:01
6:46+18:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:01
6:50+14:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:01
4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_313
1152_2-4-8-1-3_1460_007
43200_2-4-8-1-3_1440_112
43200_2-1-3_1440_92
64800_2-4-8-1-3_1440_72
64240_2-4-8-1-3_1460_72
65535_2-1-3-1-1-4_1440_82
64240_2-4-8-1-3_1460_111
26883_2-4-8-1-3_1460_111

Country

fingerprintco-occurrences
NL · Netherlands20
US · United States6
DE · Germany3
IT · Italy2
RU · Russia1
HU · Hungary1

Network (ASN)

fingerprintco-occurrences
AS197170 · TechTies Inc.20
AS8075 · Microsoft Corporation2
AS6939 · Hurricane Electric LLC2
AS14618 · Amazon.com, Inc.2
AS47583 · Hostinger International Limited2
AS47147 · ANEXIA Internetdienstleistungs GmbH2
AS24940 · Hetzner Online GmbH1
AS20845 · DIGI Tavkozlesi es Szolgaltato Kft.1
AS197695 · Domain names registrar REG.RU, Ltd1