You'll have to install a plugin from their site.

您需要从他们的网站上安装一个插件。

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To install a plugin, the following are the general directions to follow.

安装一个插件，以下是一个需要遵循的总体指导。

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However, like with most video-chat services, users will need to install a plugin before they can use it.

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You'll have to install a browser plugin to get your hit of pop-up cartography, but Google Earth addicts should be suitably impressed.

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On Thursday, Oracle released an update for its ubiquitous Java plugin that patches a serious set of security issues, ones that allowed cybercriminals to install malware through invisible downloads when users visited rigged websites.

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