A later independent study conducted by Carnegie Mellon University CyLab titled "Phinding Phish: An Evaluation of Anti-Phishing Toolbars" and released November 13, 2006 tested the ability of ten anti-phishing solutions to block or warn about known phishing sites and not block or warn about legitimate sites (not exhibit false-positives), as well as the usability of each solution. Of the solutions tested, Netcraft Toolbar, EarthLink ScamBlocker and SpoofGuard were able to correctly identify over 75% of the sites tested, with Netcraft Toolbar receiving the highest score without incorrectly identifying legitimate sites as phishing. Severe problems were however discovered using SpoofGuard, and it incorrectly identified 38% of the tested legitimate sites as phishing, leading to the conclusion that "such inaccuracies might nullify the benefits SpoofGuard offers in identifying phishing sites." Google Safe Browsing (which has since been built into Firefox) and Internet Explorer both performed well, but when testing ability to detect fresh phishes Netcraft Toolbar scored as high as 96%, while Google Safe Browsing scored as low as 0%, possibly due to technical problems with Google Safe Browsing. The testing was performed using phishing data obtained from Anti-Phishing Working Group, PhishTank, and an unnamed email filtering vendor.