Opera Software announced the latest release of its popular Web browser, Opera 9.1, which includes a new Fraud Protection feature. The protection includes technology from GeoTrust and PhishTank. GeoTrust, which was acquired by Verisign in September 2006, is the world's second largest digital certificate provider and also the maker of the TrustWatch toolbar and search extension that helps alert users to potentially malicious Web sites. PhishTank is a collaborative effort that acts as clearing house for information about phishing sites.

A spokesperson for Opera Software said that "Fraud Protection extends the original anti-phishing capability in Opera. Opera 8 introduced the security information field to help determine if a phishing site was masquerading as a trusted and verified site. Fraud Protection adds a new level of online safety by working in real-time to protect Opera users from the latest phishing attacks."

The company offers Opera Web browserfree of charge for Windows users along with the option of paid support. Opera Software also offers paid versions of the browser for various mobile devices, including phones based on Windows Mobile, Symbian OS, Nokia S60, and mobile Linux varieties.