User-Agent

Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0

first seen 2026-06-15 04:00 · last seen 2026-08-29 21:48 · 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 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
t13d311000_e8f1e7e78f70_518fb456ca597
t13d1516h2_8daaf6152771_33a51b5ad3c56
t12d4907h1_730fb1b0ac6a_8587f467d9ea4
t12d130600_2d7513195f68_e51b7354d87f1
t13d3112h1_e8f1e7e78f70_d41ae481755e1
t13d291400_723694b0fccc_836e3955dfc31
t13d1011h2_61a7ad8aa9b6_f9531d972513 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-hyper 1.11.0, rust-hyper 1.11.1, +1 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr10enus_3debd3656be3_000000000000_0000000000005
ge11nn07enus_1219f1348bb2_000000000000_0000000000003
ge11nr09enus_a1ca5f23d14f_000000000000_0000000000001
ge11nn13enus_c54f9911e1a4_000000000000_0000000000001
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.1
ge11nn060000_cf18272fb0b4_000000000000_0000000000001
ge11nn10enus_3debd3656be3_000000000000_0000000000001
ge20nn04*000_39a3ba4480e8_000000000000_0000000000001
ge11nn050000_845398f9f2c0_000000000000_0000000000001
ge20nn11enus_3901d4197baf_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 153.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|0|m,p,a,s6
2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-reqwest 0.12.28, rust-reqwest 0.13.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:06
4:47+17:0:1460:65535,3:mss,sok,ts,nop,ws:df,id+:06
4:110+18:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:48+16:0:1460:mss*20,10:mss,sok,ts,nop,ws:df,id+:01
4:51+13:0:1460:mss*29,9:mss,nop,ws:df,id+:01
4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:53+11:0:1280:mss*51,11:mss,sok,ts,nop,ws:df,id+:01
4:45+19:0:1300:mss*50,10:mss,sok,ts,nop,ws:df,id+:01
6:234+21:0:1440:mss*45,8:mss,nop,ws,nop,nop,sok:ecn,flow:01
6:235+20:0:1440:mss*45,8:mss,nop,ws,nop,nop,sok:ecn,flow:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_77
65535_2-4-8-1-3_1460_36
64800_2-1-3-1-1-4_1440_83
65000_2-4-8-1-3_1300_101
65280_2-4-8-1-3_1280_111

Country

fingerprintco-occurrences
US · United States9
NL · Netherlands6
SG · Singapore4
CH · Switzerland1
RO · Romania1

Network (ASN)

fingerprintco-occurrences
AS197170 · TechTies Inc.6
AS6079 · RCN6
AS16509 · Amazon.com, Inc.4
AS47890 · UNMANAGED LTD1
AS6939 · Hurricane Electric LLC1
AS36352 · HostPapa1
AS11878 · tzulo, inc.1
AS264617 · GRUPO PANAGLOBAL 15 S.A1