User-Agent

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:135.0) Gecko/20100101 Firefox/135.0

first seen 2026-07-10 21:39 · last seen 2026-09-30 09:31 · JSON

Decomposed attributes

Browser / client	`Firefox 135.0`
Operating system	`macOS 10.15`
Device class	`desktop`
Note	`inferred 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)

fingerprint	co-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.	13
`t13d251100_b78ed14e2fd0_ab7e3b40a677`	1

HTTP request (JA4H)

fingerprint	co-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.	12
`ge11nr050000_57c5e92682a8_000000000000_000000000000`	1
`ge20nn09enus_f2b6d441eea8_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:131072;5:16384\|12517377\|1:0:0:256\|m,p,a,s`	12
`1:65536;2:0;4:131072;5:16384\|12517377\|3:0:0:22\|m,p,a,s` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +31 more.The fingerprint page shows the full measured match list. More on the catalog.	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:51+13:0:1460:mss*44,13:mss,sok,ts,nop,ws:df,id+:0`	3
`6:47+17:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:0`	3
`6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:0`	3
`4:56+8:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:52+12:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0`	1
`6:52+12:0:1432:65535,6:mss,sok,ts,nop,ws:flow:0`	1
`4:46+18:0:1380:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0`	1
`4:50+14:0:1380:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64800_2-4-8-1-3_1440_7`	6
`64240_2-4-8-1-3_1460_13`	3
`65535_2-1-3-1-1-8-4-0-0_1380_6`	2
`64240_2-4-8-1-3_1460_7`	1
`65535_2-1-3-1-1-8-4-0-0_1460_6`	1
`65535_2-4-8-1-3_1432_6`	1

Country

fingerprint	co-occurrences
`US` · United States	4
`SE` · Sweden	3
`FI` · Finland	3
`TR` · Turkey	2
`ID` · Indonesia	1
`VN` · Vietnam	1

Network (ASN)

fingerprint	co-occurrences
`AS14061` · DigitalOcean, LLC	3
`AS24940` · Hetzner Online GmbH	3
`AS214379` · South Park Networks LLC	3
`AS9121` · Turk Telekomunikasyon Anonim Sirketi	2
`AS14956` · RouterHosting LLC	1
`AS18403` · FPT Telecom Company	1
`AS23700` · Linknet-Fastnet ASN	1