Mozilla Corp.'s next update to Firefox will sport several new safer surfing features, the company's chief of security said Wednesday, but users won't see the most important changes.

On track and expected to make it into the final version of Firefox 3.0 when it ships later this year is a tool that would automatically block sites suspected of harbouring malware. The Web browser will also offer support for the extended validation Secure Sockets Layer (EV SSL) certificates, said Window Snyder, Mozilla's chief security officer.