User-Agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.17) Gecko/20100101 Firefox/133.17; compatible; meta-externalagent/1.1; +https://developers.facebook.com/docs/sharing/webmasters/crawler

first seen 2026-09-05 21:08 · last seen 2026-09-05 21:08 · 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 133.17
Operating systemWindows 10.0
Device classbot
Declared URLhttps://developers.facebook.com/docs/sharing/webmasters/crawler
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
t13d131200_f57a46bbacb6_9249cab70c771

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr060000_6f1c3d56a901_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:55+9:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
42600_2-4-8-1-3_1420_91

Country

fingerprintco-occurrences
US · United States1

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC1