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。
Changes in Opera 9.50 Build 10034 Beta:
WARNING: These are development snapshots: they contain the latest changes, but they also have severe known issues, including crashes and data loss situations. In fact, they may not work at all.
Known issues: * Dragonfly does not work when JavaScript is disabled.
Changelog: * Downloads should work better now * Fixed bug where you could not open attachments in mail with unknown MIME type * Rendering improvements to CJK text * Reduced memory usage * Fixed a print preview crash * Fetching feeds now times out correctly * Importing mail from mbs files no longer creates tons of filters on Windows * Improved display of unselectable IMAP mailboxes * No longer expunge mail marked as read in trash * Added ability to use favicon for Dragonfly * Polishing the integrated Dragonfly * Fixed crash when having user CSS and using Dragonfly * Added bookmark title and URL to the address bar auto-completion * Improved matching of URLs in the address bar drop-down * Fixed downloading of ISO files from FTP servers * Fixed Wand logins where the submit button was initially
