How Keylogger Chrome Extensions Work: A Deep Dive into Browser Security
This isn’t theoretical. Several high-profile extensions have been caught keylogging: keylogger chrome extension work
Captured data is temporarily stored in the extension's local storage and then periodically sent to an attacker-controlled command-and-control (C&C) server, often using the How Keylogger Chrome Extensions Work: A Deep Dive
Chrome extensions are essentially small web applications running inside your browser. They have access to special APIs (Application Programming Interfaces) that standard websites do not. Case B: The Corporate Spy An IT administrator
An IT administrator installed a custom "productivity tracker" extension on 500 company Chromebooks. The extension's manifest requested host_permissions for *://*/*. The official Chrome Web Store policy forbids this for private extensions, but the admin forced it via Group Policy. The extension logged every email typed in Gmail and every ticket typed in Zendesk. The data was exfiltrated to a company-owned AWS S3 bucket. This was technically legal (corporate monitoring) but ethically gray.