Firefox webdriver opens first run page all the time

To turn off this annoying start page:

More protection. The most privacy. Mozilla Firefox firstrun screen

in C# with Selenium 2.48 I found the following solution:

FirefoxProfile prof = new FirefoxProfile();
prof.SetPreference("browser.startup.homepage_override.mstone", "ignore");
prof.SetPreference("startup.homepage_welcome_url.additional",  "about:blank");
Driver = new FirefoxDriver(prof);

…and it will never bother you again.

Note: One of these settings alone will also work. I use them together to make it bullet-proof.

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