Mozilla removed today 23 Firefox add-ons that snooped on users and sent data to remote servers, a Mozilla engineer has told Bleeping Computer today.

The list of blocked add-ons includes "Web Security," a security-centric Firefox add-on with over 220,000 users, which was at the center of a controversy this week after it was caught sending users' browsing histories to a server located in Germany.

https://www.bleepingcomputer.com/news/security/mozilla-removes-23-firefox-add-ons-that-snooped-on-users/