Trustwave SecureBrowsing

Trustwave SecureBrowsing makes it safer to search, surf and socialize online. This browser plug-in displays security icons next to links on search engines such as Google and Bing; in web-based email like Gmail and Yahoo; and on social networking sites like Facebook, Twitter and LinkedIn.

Secure Browsing even works on HTTPS version of these sites, so you'll know which pages are safe and which ones to avoid.