I've been seeing this extension all over and wasn't sure exactly what folks were doing. Turns out, they weren't doing anything. Claude for Desktop is secretly installing this thing that activates when one of three other extensions are also present.
https://www.thatprivacyguy.com/blog/anthropic-spyware/
Taggart :ifin:
npub1yg…tccz0
2026-04-20 13:20:58 UTC
Author Public Key
npub1yg8lnapwc8yyd0m32jcfdp7k28hwmsvtsqc59rsj6d6d0m3mynqs7tccz0Seen on
wss://relay.momostr.pinkPublished at
2026-04-20 13:20:58 UTCEvent JSON
{
"id": "5b7c4644f95585b901dc170c19b3ef9e21b9851f8217490a3f5f7a2e7d43a847",
"pubkey": "220ff9f42ec1c846bf7154b09687d651eeedc18b8031428e12d374d7ee3b24c1",
"created_at": 1776691258,
"kind": 1,
"tags": [
[
"proxy",
"https://infosec.exchange/@mttaggart/116437238312293535",
"web"
],
[
"proxy",
"https://infosec.exchange/users/mttaggart/statuses/116437238312293535",
"activitypub"
],
[
"L",
"pink.momostr"
],
[
"l",
"pink.momostr.activitypub:https://infosec.exchange/users/mttaggart/statuses/116437238312293535",
"pink.momostr"
],
[
"-"
]
],
"content": "I've been seeing this extension all over and wasn't sure exactly what folks were doing. Turns out, they weren't doing anything. Claude for Desktop is secretly installing this thing that activates when one of three other extensions are also present.\n\nhttps://www.thatprivacyguy.com/blog/anthropic-spyware/",
"sig": "239cd2a51aa3e109e002d5d13cc2177ac4929704d1bde63e64417a1732b573cfa46c03289f77819c5b8422d4044192c89d494f759ea3b158aea79065cdb2a57b"
}