Hi Priya,

Hope you are doing good.

The issue which you are facing is because of the incompatibility of Web Driver with Mozilla Firefox Version.

Please uninstall the Mozilla Firefox Browser from your System, download the Firefox 40.0 from the below link and install it:


Now, try to execute the Selenium Code. Please try this and let us know if the issue persist.

Also, regarding your Second Query - Yes, if you want to use the IE Browser then you need IE Driver. Please download the same from the below link:

Please feel free to revert if you need any further help.

I will wait for your response.