Opera 是來自挪威的一個極為出色的網絡瀏覽套件，具有速度快、節省系統資源、定制能力強、安全性高以及體積小等特點，目前已經是廣受歡迎的瀏覽器之一。多文檔接口 (MDI)、方便的縮放功能、整合搜索引擎、快捷鍵與鼠標手勢、瀏覽歷史記憶、防止 惡意彈出窗口、全屏模式、對 HTML 標準的支持、整合電子郵件與新聞群組以及讓用戶自定義按鈕、皮膚、工具欄等等，都使 Opera 多年來倍受喜愛。

Opera，世界上歷史最悠久的瀏覽器公司，用了 15 年時間，版本終于突破兩位數。桌面版Opera 10 Alpha 測試版今天發布.。全新 Opera 10 Alpha 測試版使用新版 Presto 渲染引擎，性能提速 30%，Acid 3 得分 100/100，增加自動更新，富文本郵件以及加強 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 細節更新：

引擎升級
Opera 10 使用最新的 Presto 引擎 2.2 版本，更快，更安全。
新的 Presto 2.2 引擎還將用于其他設備上的 Opera，比如 Opera Mobile。

真實網絡提速 30%
Presto 2.2 引擎為真實的網絡進行提速，尤其在 Gmail, Facebook 這類復雜的頁面上。

更標準，最標準！
Opera 10 率先 100/100 通過 ACID 3 測試，實現網絡字體支持，RGBA/HSLA 顏色和 SVG 支持。Opera 10 alpha 已經完全為下一代網絡應用武裝到牙齒。

拼寫檢查
能寫單詞的地方都不會拼錯，實時檢查糾正錯誤。

自動更新
Opera 10 讓您能夠方便的更新 Opera 到最新版，以保護您的安全。

多彩郵件
新的郵件客戶端提供完整的 HTML 格式支持，從此讓您的郵件變得多姿多彩。
純文本郵件，HTML 多媒體郵件，想用什么格式，Opera 全支持！

網絡字體和 SVG
網站上字樣永遠不一樣。使用 Presto 2.2 引擎，您可以在網頁上使用網絡字體 - 包括SVG字體文件。

RGBA 及 HSLA 透明
最新透明度支持。使用 Presto 2.2，頁面元素透明更容易，只需對 RGB/HSL模型加入 alpha 透明度參數。

進化中的 Opera 蜻蜓
Opera Dragonfly 功能更強大，允許編輯 DOM 和 HTTP Header。

Opera 10.0 Build 1219 Beta下載地址
Classic：http://snapshot.opera.com/windows/o100s_1219.exe
Windows：http://snapshot.opera.com/windows/o100s_1219m.exe