Opera 是来自挪威的一个极为出色的网络浏览套件，具有速度快、节省系统资源、定制能力强、安全性高以及体积小等特点，目前已经是广受欢迎的浏览器之一。多文档接口 (MDI)、方便的缩放功能、整合搜索引擎、快捷键与鼠标手势、浏览历史记忆、防止 恶意弹出窗口、全屏模式、对 HTML 标准的支持、整合电子邮件与新闻群组以及让用户自定义按钮、皮肤、工具栏等等，都使 Opera 多年来倍受喜爱。
Opera，世界上历史最悠久的浏览器公司，用了 15 年时间，版本终于突破两位数。桌面版Opera 10 Alpha 测试版今天发布.。全新 Opera 10 Alpha 测试版使用新版 Presto 渲染引擎，性能提速 30%，Acid 3 得分 100/100，增加自动更新，富文本邮件以及加强 Linux Widget 支持。
Discover the new standard in Web browsing! Opera lets you surf the Internet in a safer, faster, and easier way. One of the most full-featured Internet power tools on the market, it includes pop-up blocking, tabbed browsing, integrated searches, and advanced functions like Opera's groundbreaking E-mail program, RSS Newsfeeds and IRC chat. You can customize the look and content of your browser with a few clicks of the mouse.
Opera started out as a research project in Norway's largest telecom company, Telenor, in 1994, and branched out into an independent development company named Opera Software ASA in 1995. Opera Software develops the Opera Web browser, a high-quality, multi-platform product for a wide range of platforms, operating systems and embedded Internet products.
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. 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.
Changes in Opera 10.0 Build 1219 Beta:
# Several backend improvements to autoupdate
# Made content filter rules with a whitespace at the end work
# All languages are now included but not all are completed. Do not file bugs on text in English where you expect
# Made spellchecking work on contenteditable elements
# Switching between html and plain text mail composition works better now
# Added option to doubleclick a tab to close it opera:config#UserPrefs|DoubleclicktoCloseTab
# Fixed crash when undeleting and running a widget
# Improved stability in the search engine which indexes webpages and mail
# Plus tons of behind the scenes changes, the low level changelog is more than 1000 lines.
# Mac: Fixed startup crash on Mac OS X 10.3/Panther
# Mac: Fixed the mail/chat counter background
# Mac: Fixed low framerate on fullscreen YouTube videos
Opera v10.0 细节更新：
引擎升级
Opera 10 使用最新的 Presto 引擎 2.2 版本，更快，更安全。
新的 Presto 2.2 引擎还将用于其他设备上的 Opera，比如 Opera Mobile。
真实网络提速 30%
Presto 2.2 引擎为真实的网络进行提速，尤其在 Gmail, Facebook 这类复杂的页面上。
更标准，最标准！
Opera 10 率先 100/100 通过 ACID 3 测试，实现网络字体支持，RGBA/HSLA 颜色和 SVG 支持。Opera 10 alpha 已经完全为下一代网络应用武装到牙齿。
拼写检查
能写单词的地方都不会拼错，实时检查纠正错误。
自动更新
Opera 10 让您能够方便的更新 Opera 到最新版，以保护您的安全。
多彩邮件
新的邮件客户端提供完整的 HTML 格式支持，从此让您的邮件变得多姿多彩。
纯文本邮件，HTML 多媒体邮件，想用什么格式，Opera 全支持！
网络字体和 SVG
网站上字样永远不一样。使用 Presto 2.2 引擎，您可以在网页上使用网络字体 - 包括SVG字体文件。
RGBA 及 HSLA 透明
最新透明度支持。使用 Presto 2.2，页面元素透明更容易，只需对 RGB/HSL模型加入 alpha 透明度参数。
进化中的 Opera 蜻蜓
Opera Dragonfly 功能更强大，允许编辑 DOM 和 HTTP Header。
Opera 10.0 Build 1219 Beta下载地址
Classic：http://snapshot.opera.com/windows/o100s_1219.exe
Windows：http://snapshot.opera.com/windows/o100s_1219m.exe