Web Defender - extension for Google Chrome™
Real-time protection for your browser
Can block malicious domains, malicious URLs, phishing websites.
Contains expanded database of malicious domains and URLs.
Contains integrated module "Smart Phishing Detector" for accurate detection of phishing websites.
It's absolutely free!
"Thats why we've designed a service to catalogue and database extensions doing malicious things. In addition we've created an extension that can help you scan your computer for these potentially unwanted extensions. "