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When you set proxy server parameter in the code below if your proxy server requires authentication then FireFox will bring Authentication dialog and basically you can't fill it in automatically. So is there is anyway to set USERNAME and PASSWORD ?

FirefoxProfile profile = new FirefoxProfile();
String PROXY = "192.168.1.100:8080";
OpenQA.Selenium.Proxy proxy = new OpenQA.Selenium.Proxy();
proxy.HttpProxy=PROXY;
proxy.FtpProxy=PROXY;
proxy.SslProxy=PROXY;
profile.SetProxyPreferences(proxy);
FirefoxDriver driver = new FirefoxDriver(profile);

If you try to format proxy string to something like that http://username:pass@192.168.1.1:8080 You get error that string is invalid. So I wonder there is must be a way of achieving this.

Any help would be appreciated.

Answers

What you can do is to create a profile and save the authentication data in it. If your profile is called "webdriver" you can select it from your code in the initialization:

ProfilesIni allProfiles = new ProfilesIni(); 
FirefoxProfile profile = allProfiles.getProfile("WebDriver"); 
profile.setPreferences("foo.bar",23);
WebDriver driver = new FirefoxDriver(profile);