User-Agent

Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0

first seen 2026-06-17 13:22 · last seen 2026-10-24 21:45 · 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 133.0
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
t13d190900_9dc949149365_97f8aa674fd96
t13d251100_b78ed14e2fd0_ab7e3b40a6772
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
t13d1312h2_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +7 more.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 1.12.0, rust-hyper 1.11.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr11enus_d756a6a6873f_000000000000_0000000000006
po11nn050000_b4ba55311b46_000000000000_0000000000001
ge11nn050000_57c5e92682a8_000000000000_0000000000001
ge11nn020000_2f58a845b48b_000000000000_0000000000001
ge11nr07enus_1ce6da179c54_000000000000_0000000000001
ge20nr04enus_118e0135d6ef_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:56+8:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:05
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1460:mss*44,9:mss,sok,ts,nop,ws:df,id+:01
4:58+6:0:1420:mss*46,7:mss,sok,ts,nop,ws:df,id+:01
4:56+8:0:1460:mss*30,12:mss,sok,ts,nop,ws:df,id+,ts2+:01
4:56+8:0:1460:mss*44,9:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_92
64240_2-4-8-1-3_1460_71
65320_2-4-8-1-3_1420_71

Country

fingerprintco-occurrences
NL · Netherlands7
ID · Indonesia2
DE · Germany1
TW · Taiwan1

Network (ASN)

fingerprintco-occurrences
AS48090 · TECHOFF SRV LIMITED6
AS396982 · Google LLC1
AS197170 · TechTies Inc.1
AS55688 · PT. Beon Intermedia1
AS399979 · 49.3 Networking LLC1
AS58485 · WIFIAN ID1

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.2