User-Agent

Mozilla/5.0 (Android 16; Mobile; rv:158.0) Gecko/158.0 Firefox/158.0

first seen 2026-10-21 09:55 · last seen 2026-10-21 12:42 · 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 158.0
Operating systemAndroid 16
Device classmobile
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
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.10

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr10ruru_b3034183f430_000000000000_0000000000004
ge20nn10ruru_d353d425b0bb_000000000000_0000000000002
ge20nn11ruru_3901d4197baf_000000000000_0000000000002
ge20nr11ruru_3901d4197baf_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:22|m,p,a,s4
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:42|m,p,a,s4
1:4096;2:0;4:32768;5:16384|12517377|5:0:0:42|m,p,a,s1
1:4096;2:0;4:32768;5:16384|12517377|7:0:0:42|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
6:49+15:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:010

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_710

Country

fingerprintco-occurrences
US · United States10

Network (ASN)

fingerprintco-occurrences
AS203273 · NetCrafters OU10

TLS supported groups

fingerprintco-occurrences
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.10