Features of Firefox 4 Beta include Firefox sync, so that browsing history, bookmarks, tabs, and passwords are synced across your mobile and desktop devices.

Be ta版火狐4包含火狐同步特性，以致于您浏览的历史记录、书签、标签和密码等信息将在您的移动和桌面设备之间同步。

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With Firefox Sync, you can take your browsing history, bookmarks, tabs, passwords and form-fill data with you anywhere so you never have to retype passwords or long URLs again.

有了火狐同步，你可以随身带上你的浏览有历史记录、书签、标签、密码以及表单数据，再也不用再输入密码或长URL了。

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In fact, it's what we used to sync Firefox extensions across the Internet.

实际上，你可以通过互联网同步火狐浏览器的扩展插件。

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Feature-wise, preferences and other desktop settings imported easily with Firefox Sync's shared password system, and the unfortunately named "Awesome Screen" is the new home page shown above, from which it's fairly simple to launch your preferred sites.

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