C# Selenium WebDriver - FirefoxDriver error: Failed to start up socket within 45000
I had the same problem and solved it with updating my Selenium packages with NuGet.
I would recommend you add NuGet to Visual Studio and add the Selenium packages that way, and it will probably solve the problem for you.
I also had the similar problems with Chrome and IE drivers for Selenium, which are not available through NuGet and I solved the problems here by downloading the latest versions from the Selenium site.
You need to use the matching version of Firefox with selenium IDE.
You probably need to downgrade Firefox ot upgrade selenium IDE such as Arran comment's.
I had the same problem because I had selenium 1.9 and Firefox 17 but this version of the ide has to be release :
1.10.0 (to be released)New - Added support for Firefox 16 & 17
1.9.1New - Added support for Firefox 15
1.9.0New - Added support for Firefox 14
The problem can be solved if all selenium components (RC, Support, WebDriver, WebDriverBackedSelenium) are uninstalled through NuGet and installed again through NuGet.