If you want to install opera web browser you need to download the latest version from here you can select which version of ubuntu (Dapper,Edgy etc) you are using and click on download It is designed to be fast and highly customizable.
Opera includes pop-up blocking, tabbed browsing, integrated searches, and advanced functions like a password manager, mouse gestures, native Scalable Vector Graphics (SVG) support, an email program, RSS newsfeeds, and IRC chat. Opera is a full-featured Internet tool, most notably a fully standard conforming Web browser.
