User-Agent

Mozilla/5.0 (X11; Linux x86_64; rv:127.0) Gecko/20100101 Firefox/127.0

first seen 2026-06-30 16:16 · last seen 2026-11-01 16:21 · JSON

Last 7 days (76 observations)

Distinct clients per day (last 30 days, peak 50/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 127.0
Operating systemLinux x86_64
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.76
t13d151100_8daaf6152771_ab7e3b40a67756
t13d1411h1_cbb2034c60b8_e7c2852226514
t13d1812h1_85036bcba153_b26ce05bbdd62
t13d1312h2_a44d0ee8b3cc_e381dae6da6b1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr16zhtw_3dfdba18536b_000000000000_00000000000013
ge11nr16frfr_3dfdba18536b_000000000000_00000000000010
ge11nr16enus_3dfdba18536b_000000000000_0000000000008
ge11nr16dede_3dfdba18536b_000000000000_0000000000008
ge11nr16engb_3dfdba18536b_000000000000_0000000000008
ge11nr16zhcn_3dfdba18536b_000000000000_0000000000008
ge11nr15engb_944d72baa157_000000000000_0000000000006
ge11nr34enus_ee7234eb47b7_000000000000_0000000000005
ge11nr33enus_bbfdbeea19bc_000000000000_0000000000005
ge11nr15frfr_944d72baa157_000000000000_0000000000005

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;3:1;4:8388608;5:65536|8323073|0|m,s,a,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:56+8:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:038
4:55+9:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:09
4:54+10:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:09
4:120+8:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:04
4:46+18:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:44+20:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:03
4:42+22:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1440: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
4:46+18:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:02

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_1138
42340_2-4-8-1-3_1460_918
65535_2-4-8-1-3_1460_610
65535_2-4-8-1-3_1412_69
65535_2-4-8-1-3_1440_67
64240_2-4-8-1-3_1440_76
65535_2-4-8-1-3_1452_85
65535_2-4-8-1-3_1412_84
64240_2-1-3-1-1-4_1460_84
64240_2-4-8-1-3_1460_73

Country

fingerprintco-occurrences
NL · Netherlands42
BR · Brazil21
US · United States18
AR · Argentina9
MX · Mexico5
BD · Bangladesh5
NG · Nigeria5
CO · Colombia5
PK · Pakistan5
UZ · Uzbekistan3

Network (ASN)

fingerprintco-occurrences
AS48090 · TECHOFF SRV LIMITED38
AS150303 · SoloRDP11
AS142430 · DIGI VPS7
AS197170 · TechTies Inc.4
AS22927 · Telefonica de Argentina4
AS28573 · Claro NXT Telecomunicacoes Ltda3
AS13999 · Mega Cable, S.A. de C.V.3
AS29465 · MTN NIGERIA Communication limited3
AS31898 · Oracle Corporation2
AS36947 · Telecom Algeria2

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog.76
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.2