Most often, exploits, trojans, and other forms of Javascript attacks are aimed squarely at holes in other browsers. The surfer is protected from these problems simply by using Opera. There have been hundreds of reports around the net of very serious problems with these scripts. If you do run IE, you should turn off these scripts and only enable for trusted sites. Opera gives you more choices to control cookies than all other browsers combined.
Opera is the only major browser to support the blocking of referral strings.
Those holes don't exist in Opera. Many of the email born viruii are also aimed at problems with other email clients. Never open an untrusted program attachment you weren't expecting. Safe Surfing With Opera Opera gives the user a wide array of tools to prevent security problems. The main controls involved in security are found on the preferences dialogs under, privacy , Security , and Plugins .