There were multiple suggestions to use FirefoxProfile or DesireCapabilities to accomplish that. Those also never work for me. What did is the answer from a brilliant SO user @alecxe. See this
Luckily, there are people who do some great work for us so we can take the benefit. Use this add-on and that will solve your problem. And configuring that is real simple. Just right click on the Add to Firefox button and Save link as that will give you the option to save the .xpi. Then, configure the the Firefox profiler as follows.
FirefoxProfile profile = new FirefoxProfile();
profile.AddExtension(@"D:\Users\Saifur\Desktop\noScript.xpi");
IWebDriver driver = new FirefoxDriver(profile);
driver.Navigate().GoToUrl("https://stackoverflow.com/");
And, just to show you it's working I did a Scrrencast