User-Agent

Mozilla/5.0 (X11; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0

first seen 2026-07-01 14:32 · last seen 2026-09-10 11:37 · JSON

Last 7 days (1 observations)

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 121.0
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
t13d1312h1_f57a46bbacb6_ab7e3b40a6777
t13d301100_1d37bd780c83_8e6e362c5eac1
t13d311000_e8f1e7e78f70_1f22a2ca17c41

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr05enus_900748f1e0f3_000000000000_0000000000007
ge11nn07enus_9cffa57b58a3_000000000000_0000000000002

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:02
4:56+8:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:02
4:51+13:0:1460:65535,8:mss,nop,ws,sok,ts:df:01
4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:55+9:0:1460:65535,12:mss,sok,ts,nop,ws:df,id+:01
4:55+9:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:01
4:54+10:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_93
42340_2-4-8-1-3_1460_112
65535_2-1-3-4-8_1460_81
64240_2-4-8-1-3_1460_71
65535_2-4-8-1-3_1460_121
42340_2-4-8-1-3_1460_121

Country

fingerprintco-occurrences
US · United States6
NL · Netherlands2
SE · Sweden1

Network (ASN)

fingerprintco-occurrences
AS142430 · DIGI VPS3
AS48090 · TECHOFF SRV LIMITED2
AS7922 · Comcast Cable Communications, LLC2
AS150303 · SoloRDP1
AS203861 · Miteflux Technologies Ltd1