How to Enable Firebug in the Mozilla session started by Webdriver

Download the firebug xpi file from mozilla and start the profile as follows:

   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);

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