It is a demonstration of the power of XUL, but it is also very open for extension using XUL.

它演示了XUL的强大功能，但也支持使用XUL构建的扩展。

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Tweak CSS instantly? In this article, learn to use Firebug, a free, open source extension for the Firefox browser that provides many useful developer features and tools.

在本文中，了解如何使用 Firefox 浏览器的免费开源扩展 Firebug，它提供了很多有用的开发特性和工具。

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The browser will accept it as an unknown file type and then prompt the user to open it based on the registered program for that file extension.

该浏览器将接受它作为一个未知的文件类型，然后提示用户根据注册的程序为文件扩展名打开它。

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Did he suggest at all that he would be open to a temporary extension of the tax cuts for the wealthy?

WHITEHOUSE: Press Briefing

The free, open-source plug-in, an extension for Firefox, checks a library of scraped terms of service and privacy policies from dozens of major sites that updates every three hours.

FORBES: Firefox Privacy Plug-In Reads The Fine Print So You Don't Have To

Announcing the failure of the latest trial Tuesday, the two companies said they would halt development of Dimebon for all indications and cease an ongoing open-label extension study in Alzheimer's disease.

WSJ: Medivation, Pfizer Alzheimer's Drug Fails to Meet Study Goals