多文件接口(MDI)、方便的缩放功能、整合搜索引擎、键盘截径与鼠标浏览功能、当机时下次可以从上次浏览进度开始、防止pop-up、Fullscreen、对HTML标准的支持、整合电子邮件与新闻群组以及让使用者自订接口按钮、skin、工具列等的排列方式，都是Opera多年来备受喜爱的特殊功能。对于对互联网技术有进一步研究的用户，Opera也是一个不可多得的好工具，包括HTML的标准验证、支持WML(WAP)、可以创建关连窗口、显示窗口尺寸等功能，对于设计网页的工作者助益很大。而Opera精心为视障用户设计的一系列功能，也是一个特点。另外值得一提的是，Opera除了在Windows外，也支持Linux、Mac等桌面操作系统，值得拭目以待。另外在欧美推出的Nokia 9210i当中，也内建的Opera在Symbian操作系统的浏览器，足见Opera在浏览器技术的实力。
Opera is known as the fastest and smallest full-featured browser, a first choice for people using older PCs and Windows 95 and a brilliant alternative to the default IE from Microsoft. This new version has a chance to actually beat IE hands-down because it has a truckload of new and exciting features. It complies to all the current web-page standards, it has a completely new interface (you can choose from single window and multi-window view), built-in search, a download manager, an advanced mail/news reader, print preview, a huge bookmark collection and much more in a 2Mb free package! Well, the free package also includes banner ads, but Opera is believed to be completely free of spyware, unlike some of its competitors. It’s lightning fast as well as stable and it looks gorgeous. It’s simply perfect! For a complete list of features check out the official website, there’s vastly more to discover.
Opera, first of all, is client World Wide Web, that is the program for extraction of the information from WWW as the documents created with help HyperText Markup Language (language of a marking of hypertext HTML).
Low requirements to resources of system. Opera will work even on 386 computer about 6 Mb of operative memory. MDI the interface. You can open without special expenses of memory any quantity of windows inside one working window, having chosen thus a tabulared or cascade mode.
Known issues:
• Wand doesn't save anymore.
• Yahoo mail beta might crash Opera.
• Some UNIX packages are missing.
• Won't work on Win98/95
Changelog:
• [272376] Cursor in source viewer positioned at the end
• [277681] Some order lists are displayed as unordered lists
• [279302] Line wrapping does not work correctly in some cases, causing overly long lines of text and horizontal scrollbars; often seen at Wikipedia
• [280678] Files are often saved with the incorrect file extension
• [281550] Setting an external source viewer does not work
• [267842] View bar is available in the customization dialog again
• [274676] Original text color (inside tables) not reverted when closing content blocker dialog
• [267859] Numbers (and borders) not shown in configured speed dial entries
• [273030] Text squished/mashed together after removing thumbnail
• [273822] Link focused by inline find cannot be activated (Enter doesn't work after spatnav)
• [281879] Show cached images randomly breaks
• [282003] Lots of unread messages and drafts after upgrade
• APNG 1.0 support added. Will work as animated gifs on webpages and skins
• Select custom application when downloading files
• Added multithreading to mail for improved performance
• Added x button on notifiers
• Fixed IE bookmark folder import
• General stability fixes
• Tons of layout/js fixes
Windows specific:
• Greatly improved performance with alpha transparency (animations, scrolling)
Mac specific:
• Further tweaking of tabs in native skin
• Removed page loading spinner from Address bar
• Rounded edges on many dialog Title bars
• Fixed application window focus/activation problems
• Fixed problems with Flash problems with wmode=opaque and CSS hover
• Prevent some start-up freezes
• Pulsing progress bar
官网：http://www.opera.com
v9.50 Build 9523 Alpha For Windows (Classic Installer) English
v9.50 Build 9523 Alpha For Windows (MSI Installer) International
v9.50 Build 4417Alpha For Macintosh
v9.50 Build 1581Alpha For Unix Systems
v9.23 Build 8808 Final For Windows (MSI Installer) International
其它下载：http://www.opera.com/download/index.dml