Web browsers are massive, in many ways becoming a new operating system we use to access data, watch videos, and manage professional services. Following that, browser extensions have quietly become one of the most overlooked risks in enterprise security. And as the recent revelations about the campaign make clear, attackers increasingly understand that the easiest way into an organization might be through the small, trusted extensions that users install without a second thought.

This article breaks down what happened, why it matters, and why organizations subject to security frameworks need to treat browser extensions as a first-class part of their threat models.