Opera为来自挪威的一个极为出色的浏览器，具有速度快、节省系统资源、订制能力强、安全性高以及体积小等特点，目前已经是最受欢迎的浏览器之一。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Opera5.4.html">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 11.50 beta发行日志：
New and improved features
Code name
Opera 11.50 beta uses "Swordfish" as its code name.
Opera Presto 2.8 rendering engine
Opera 11.50 beta uses the latest version of the Opera Presto 2.8 rendering engine.
Opera Next
Opera Next is a stand-alone installation of the Opera desktop browser intended for testing the development of new features, technologies, and improvements.
Important note: Pre-release builds may be unstable and include known issues, such as crashes or data loss situations. See: What is Opera Next?
Opera Link: Password synchronization
The most requested feature for Opera Link is password synchronization.
You can enable it when you set up link for the first time or in the Synchronization Options dialog.
Speed Dial extensions
Speed Dial extensions are like small web pages embedded in your Speed Dial powered by Opera's extension framework.
They allow developers to make live previews of web pages or other nice decorations for your Speed Dial. The Add Speed Dial dialog now promotes Speed Dial extensions, and the way Speed Dial extensions are shown in the extensions manager has been improved. You can also install the same Speed Dial extension
more than once. See: Opera Extensions API: Speed Dial guide See: Creating Opera Speed Dial Extensions See: Extensions - in Speed Dial!
Web specifications support
Opera 11.50 beta incorporates web specifications added up to and including Opera Presto 2.8 core-integration-point 158. For further reference please see:
Web specifications support in OperaCSS Improved deep nesting of the quotes property. See: W3C CSS 2.1 Section 12.3: Quotation marksDOM event handling Updated the list of DOM events visible on window, document and element objects. Events supported by Opera and part of the Window interface of the HTML standard are now exposed on the window object. Events supported by Opera and part of the HTMLDocument interface are now exposed on the HTML document object. onstorage has been removed. Events supported by Opera and part of the HTMLElement interface are exposed on all elements, unless the events are form specific, in
which case they remain visible only on form elements. See: HTML5 elements, attributes, and APIs support in Opera Presto 2.8 See: W3C HTML5 Section 3.1.1: Documents in the DOM See: W3C HTML5 Section 3.2.2: Elements in the DOM See: W3C HTML5 Section 5.2: The Window objectHTML5 dataset attribute Added support for the dataset attribute on elements which exposes data-* attributes on an element. See: Dev.Opera: An Introduction to Datasets See: HTML5 elements, attributes, and APIs support in Opera Presto 2.8 See: W3C HTML5 Section 3.2.3.8: Embedding custom non-visible data with the data-* attributesHTML5 Session history and navigation Added support for the history interface. See: HTML5 Session History and Navigation support in Opera Presto 2.8 See: W3C HTML5 Section 5.4: Session history and navigationHTML5 and
SVG classList attribute Enabled the classList attribute for HTML and SVG elements. See: HTML5 elements, attributes, and APIs support in Opera Presto 2.8 See: W3C HTML5 Section 3.2.3.6: The class attributeHTML5 <time> element Implemented the HTML5 <time> element. See: W3C HTML5 Section 4.6.10: The time element. See: W3C HTML5 Section 10.4.17: The time elementOpera Widgets specification Default widget size has been overridden from 100x100 to 300x300. See: Opera Widgets specificationSelectors API Implemented Element.oMatchesSelector. Prefixed implementation of the Element interface .matchesSelector method with "o". Note: The refNodes parameter is not supported. See: W3C Selectors API Level 2.
下载地址：http://get.geo.opera.com/pub/opera/win/1150b1/int/Opera_Next_1150b1_int_Setup.exe