User-Agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:153.0) Gecko/20100101 Firefox/153.0
first seen 2026-06-23 17:02 · last seen 2026-09-14 14:34 · JSON
Last 7 days (4 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 / client | Firefox 153.0 |
|---|---|
| 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 |
|---|---|
q13d0315h3_55b375c5d22e_dc5437974b47 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +18 more.The fingerprint page shows the full measured match list. More on the catalog. | 29 |
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 11 |
t13d1616h2_86a278354501_0c27189014cf Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 11 |
q13d0316h3_55b375c5d22e_dc4af083c550 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 155.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d1516h2_8daaf6152771_cd486ad61c78 | 1 |
t13d1615h2_86a278354501_9f0199917760 | 1 |
t13d1716h2_6e7903f2cb1b_0c27189014cf | 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. | 7 |
ge20nr12svse_979a40433f82_000000000000_000000000000 | 4 |
ge30nr11svse_c601de5755fc_000000000000_000000000000 | 4 |
ge20nr11enus_b83bdc73d8bd_000000000000_000000000000 | 4 |
ge30nr09enus_a060b6642c5e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +22 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge20nr10enus_b3034183f430_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +21 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge30nr11enus_c87d53636918_000000000000_000000000000 | 3 |
ge30nr10enus_9fcbd3f1e2d6_000000000000_000000000000 | 3 |
ge30nr13enus_0cd127baf128_000000000000_000000000000 | 2 |
ge30nn11svse_21988cdf9f27_000000000000_000000000000 | 2 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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 154.0, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 13 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:22|m,p,a,s | 3 |
3:100;4:8000000;2:0|7934465|0|m,p,a,s | 1 |
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 155.0, firefox 154.0, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
2:0;4:131072;5:16384;6:16384|12517377|0|m,p,a,s | 1 |
TCP SYN (p0f)
TCP SYN (JA4T)
QUIC transport params
| fingerprint | co-occurrences |
|---|---|
q12_022106b74856 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 27 |
q13_29150affcbde Match?Exact match in Thumbprint's published controlled catalog captures: firefox 151.0.3, firefox 132.0, firefox 151.0.4, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 23 |
SE · Sweden | 19 |
HR · Croatia | 4 |
CY · Cyprus | 4 |
LV · Latvia | 3 |
JP · Japan | 1 |
GB · United Kingdom | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS8473 · Bahnhof AB | 19 |
AS9009 · M247 Europe SRL | 5 |
AS57169 · EDIS GmbH | 4 |
AS701 · Verizon Business | 4 |
AS6128 · Cablevision Systems Corp. | 4 |
AS15994 · A1 Hrvatska d.o.o. | 4 |
AS7018 · AT&T Enterprises, LLC | 3 |
AS59967 · SIA EVOLUTION LATVIA | 3 |
AS19165 · Webpass Inc. | 3 |
AS30633 · Leaseweb USA, Inc. | 2 |
Cross-transport links
TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).