User-Agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0

first seen 2026-06-11 04:21 · last seen 2026-10-27 21:20 · JSON

Last 7 days (3 observations)

Distinct clients per day (last 30 days, peak 2/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 133.0
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
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.22
t13d190900_9dc949149365_97f8aa674fd96
t13d141000_cbb2034c60b8_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.22.12.The fingerprint page shows the full measured match list. More on the catalog.2
t13d141100_cbb2034c60b8_e5728521abd42
t13d1712h1_ab0a1bf427ad_8e6e362c5eac2
t13d3013h1_1d37bd780c83_ecd0401ec68b2
t13d201100_2b729b4bf6f3_36bf25f296df1
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.1
t13d311100_e8f1e7e78f70_d41ae481755e Match?Exact match in Thumbprint's published controlled catalog captures: rust-hyper 1.11.1, rust-hyper 1.11.0, rust-hyper 1.12.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1515h2_8daaf6152771_be51d82afabe1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr030000_cd680697de12_000000000000_0000000000009
ge11nn030000_cd680697de12_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.5, powershell 7.6.4, +11 more.The fingerprint page shows the full measured match list. More on the catalog.7
ge11nr11enus_d756a6a6873f_000000000000_0000000000006
ge11nn030000_0db47b7d240d_000000000000_0000000000003
ge11nn040000_8391bea91fb6_000000000000_0000000000002
ge11nn040000_e1d2031bdfea_000000000000_0000000000002
ge20nn04enus_ded3c6d8f0eb_000000000000_0000000000002
ge11nn020000_3ed38b250d3d_000000000000_0000000000001
ge11nr21enus_78e80cc6e81c_000000000000_0000000000001
he11nr21enus_78e80cc6e81c_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:4096;2:0;4:65535;5:16384;3:100;6:65536|16777216|0|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;4:131072;5:16384|12517377|0|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
4:56+8:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:021
4:54+10:0:1460:65535,12:mss,sok,ts,nop,ws:df,id+:03
4:49+15:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:02
4:56+8:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:02
4:54+10:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:02
4:57+7:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:02
4:53+11:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:01
4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_1218
42340_2-4-8-1-3_1460_114
64240_2-4-8-1-3_1460_72
64240_2-4-8-1-3_1460_102
43200_2-4-8-1-3_1440_112
64800_2-4-8-1-3_1440_91

Country

fingerprintco-occurrences
NL · Netherlands30
US · United States5
DE · Germany4
AT · Austria2
FR · France1

Network (ASN)

fingerprintco-occurrences
AS48090 · TECHOFF SRV LIMITED29
AS142430 · DIGI VPS5
AS212238 · Datacamp Limited2
AS197540 · netcup GmbH2
AS197170 · TechTies Inc.1
AS24940 · Hetzner Online GmbH1
AS3215 · Orange S.A.1
AS401626 · Netiface America, Inc.1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.3
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.2