PayPal has announced its intention to block users from its payment service site if they are using browsers it considers unsafe because of increased phishing attacks against PayPal customers. To be considered 'safe', browsers must have anti-phishing technology embedded and offer support of the new Extended Valuation Secure Socket Layer certificates (EV SSL). In support of the announcement, PayPal said allowing users to continue using browsers without the new security features was akin to car makers allowing buyers to purchase cars without seatbelts. The PayPal spokesman only singled out older versions of IE, but the move could result in excluding Safari browsers completely as well as older versions of Firefox. IE7 supports EV SSL and indicates sites using the new certificates with a green background in the address bar. Both Firefox and Opera have announced intentions to support the new security features in the near future.