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File file = new File("firebug-1.8.1.xpi"); FirefoxProfile firefoxProfile = new FirefoxProfile(); firefoxProfile.addExtension(file); firefoxProfile.setPreference("extensions.firebug.currentVersion", "1.8.1"); // Avoid startup screen WebDriver driver = new FirefoxDriver(firefoxProfile);
原文：http://www.cnblogs.com/lgm1999/p/5638436.html