User-Agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:149.0) Gecko/20100101 Firefox/149.0

first seen 2026-06-11 12:43 · last seen 2026-10-14 15:13 · 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 149.0
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
t13d1312h1_f57a46bbacb6_ab7e3b40a67718
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.2
t13d3012h2_1d37bd780c83_882d495ac381 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.21.0, curl 8.22.0, curl 8.23.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.2
t13i130900_f57a46bbacb6_e7c2852226511
t12d210700_76e208dd3e22_f28add8e7af01
t13d131200_f57a46bbacb6_9249cab70c771
t13d1910h1_9dc949149365_97f8aa674fd91

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_e1d2031bdfea_000000000000_0000000000008
ge11nn040000_e1d2031bdfea_000000000000_0000000000005
ge11nn040000_88d30a62b7ad_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.4
ge11nn05enus_813e32c09d15_000000000000_0000000000003
ge11nr040000_88d30a62b7ad_000000000000_0000000000001
ge20nn11enus_88b055d688ad_000000000000_0000000000001
ge20nr06enus_7dc1fb81e529_000000000000_0000000000001
he11nr030000_fe444ad14866_000000000000_0000000000001
he11nn030000_fe444ad14866_000000000000_0000000000001
ge11nr13enus_92a7a7cc3533_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
4:55+9:0:1436:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
6:47+17:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:03
4:52+12:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:02
6:57+7:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:02
4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:49+15:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:01
4:110+18:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1452:mss*44,10:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_74
64800_2-4-8-1-3_1440_74
64240_2-4-8-1-3_1436_73
42340_2-4-8-1-3_1460_132
64240_2-1-3-1-1-4_1460_81
64240_2-4-8-1-3_1460_91
43200_2-4-8-1-3_1440_91

Country

fingerprintco-occurrences
US · United States13
DE · Germany4
NL · Netherlands4
ES · Spain2
CA · Canada1
GB · United Kingdom1
FR · France1

Network (ASN)

fingerprintco-occurrences
AS9009 · M247 Europe SRL5
AS22295 · Advin Services LLC4
AS211693 · NolimitCloud s.r.o4
AS41608 · NextGenWebs, S.L.2
AS7203 · Leaseweb USA, Inc.2
AS3352 · TELEFONICA DE ESPANA S.A.U.2
AS26277 · ServerPoint.com2
AS203363 · Kuroit Limited2
AS14061 · DigitalOcean, LLC1
AS16276 · OVH SAS1

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