User-Agent

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:147.0) Gecko/20100101 Firefox/147.0

first seen 2026-06-17 10:07 · last seen 2026-10-28 04:44 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 3/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 147.0
Operating systemmacOS 10.15
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
t13d1717h2_5b57614c22b0_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog.36
t13d311000_e8f1e7e78f70_518fb456ca597
q13d0313h3_55b375c5d22e_4effff169a463
t13d1717h2_5b57614c22b0_68c5a8c2958d1

HTTP request (JA4H)

fingerprintco-occurrences
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.34
ge11nr10enus_3debd3656be3_000000000000_0000000000004
ge30nn11enus_3901d4197baf_000000000000_0000000000003
ge11nr09enus_a1ca5f23d14f_000000000000_0000000000002
ge20nn11kokr_3901d4197baf_000000000000_0000000000002
ge11nn10enus_3debd3656be3_000000000000_0000000000001
ge20nn10kokr_71a24014cdf5_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:42|m,p,a,s37

TCP SYN (p0f)

fingerprintco-occurrences
6:47+17:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:06
4:36+28:0:1460:65228,7:mss,nop,ws,sok,ts:df:04
4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:03
6:48+16:0:1440:65535,10:mss,sok,ts,nop,ws:flow:03
4:109+19:0:1300:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:113+15:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_711
64240_2-4-8-1-3_1460_78
65228_2-1-3-4-8_1460_75
65535_2-4-8-1-3_1440_104
64240_2-4-8-1-3_1300_73
62727_2-4-8-1-3_1460_71
65535_2-1-3-1-1-8-4-0-0_1460_61
64860_2-4-8-1-3_1380_101
64240_2-4-8-1-3_1460_81
65535_2-1-3-4-8_1460_81

QUIC transport params

fingerprintco-occurrences
q12_022106b74856 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +30 more.The fingerprint page shows the full measured match list. More on the catalog.3

Country

fingerprintco-occurrences
US · United States22
RU · Russia9
FI · Finland5
SE · Sweden3
KR · South Korea2
TR · Turkey2
DE · Germany1
BR · Brazil1
CN · China1
LT · Lithuania1

Network (ASN)

fingerprintco-occurrences
AS213230 · Hetzner Online GmbH10
AS24940 · Hetzner Online GmbH5
AS200373 · 3xK Tech GmbH5
AS41601 · NEO Print Ltd.5
AS25159 · PJSC MegaFon3
AS214379 · South Park Networks LLC3
AS212317 · Hetzner Online GmbH2
AS4766 · Korea Telecom2
AS14618 · Amazon.com, Inc.1
AS4134 · CHINANET BACKBONE1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019,0100,01012