Opera has been around since 1994 and has yet to really grab a large user base. It has always been a relatively solid choice of a web browser but is overshadowed by Firefox, Internet Explorer, and Chrome. Opera and Internet Explorer 9 have a similar feature which is that they will try and navigate you away from harmful websites and content. Opera also sports extended validation. Extended validation is a type of certificate which is issued only after strict criteria has been met. Extended validation makes sure a website is who they say they are. Opera also has top of the line 256-bit encryption to help guarantee security. Opera is a valid alternative to the other major browsers, but to be quite honest I would just stay with Chrome or Firefox.