User-Agent

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:125.0) Gecko/20100101 Firefox/125.0

first seen 2026-10-27 09:26 · last seen 2026-10-28 14:36 · JSON

Last 7 days (93 observations)

Distinct clients per day (last 30 days, peak 64/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 125.0
Operating systemmacOS 10.15
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
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.93

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr16engb_3dfdba18536b_000000000000_00000000000014
ge11nr16enus_3dfdba18536b_000000000000_00000000000013
ge11nr16zhcn_3dfdba18536b_000000000000_00000000000012
ge11nr16zhtw_3dfdba18536b_000000000000_00000000000010
ge11nr16frfr_3dfdba18536b_000000000000_00000000000010
ge11nr15engb_944d72baa157_000000000000_00000000000010
ge11nr16dede_3dfdba18536b_000000000000_0000000000008
ge11nr15dede_944d72baa157_000000000000_0000000000005
ge11nr15frfr_944d72baa157_000000000000_0000000000003
ge11nr15enus_944d72baa157_000000000000_0000000000003

TCP SYN (p0f)

fingerprintco-occurrences
4:44+20:0:1400:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:45+19:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1412:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1400:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1440:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:43+21:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:48+16:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1440:65535,8:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1412:mss*44,7:mss,sok,ts,nop,ws:df,id+:02

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_69
65535_2-4-8-1-3_1440_69
64240_2-4-8-1-3_1460_77
64240_2-4-8-1-3_1440_76
64240_2-4-8-1-3_1412_76
65535_2-4-8-1-3_1412_65
64240_2-4-8-1-3_1452_75
65535_2-4-8-1-3_1440_85
64240_2-4-8-1-3_1400_74
65535_2-4-8-1-3_1460_84

Country

fingerprintco-occurrences
BR · Brazil23
AR · Argentina12
MX · Mexico6
ZA · South Africa5
CO · Colombia5
VE · Venezuela5
BD · Bangladesh3
MA · Morocco3
NG · Nigeria3
AE · United Arab Emirates3

Network (ASN)

fingerprintco-occurrences
AS28573 · Claro NXT Telecomunicacoes Ltda3
AS7303 · Telecom Argentina S.A.3
AS10620 · Telmex Colombia S.A.2
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.2
AS8151 · Uninet S.A. de C.V.2
AS15802 · Emirates Integrated Telecommunications Company PJSC2
AS3816 · COLOMBIA TELECOMUNICACIONES S.A. ESP BIC2
AS22927 · Telefonica de Argentina2
AS36925 · MEDITELECOM2
AS7738 · V tal2

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.93